Fatal error call to undefined function session_id

fatal error call to undefined function session_id

make sure that the save_path is right. if there is no session section, please install the php72-session module (72 is the version) whereis php72. I get this error: "Fatal error: Call to undefined function session_id() in /home/marvelfiles/marvelfiles.com/libraries/joomla/session/session.php on line. I am running SuSE 9.1 with Apache 2.0.49, PHP 4.3.4-26, and squirrelmail receive the error: Fatal error: Call to undefined function: session_id() in.

Apologise: Fatal error call to undefined function session_id

Fatal error call to undefined function session_id
Fatal error call to undefined function session_id
Fatal error call to undefined function session_id
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hello,

i have tried follow instructions upgrade website joomla 2.5, not able our admin page. error.

fatal error: call undefined function session_id() in /home/marion2014/marionffwb.com/libraries/joomla/session/session.php on line 96

if appreciate it.

thanks.
this makes no sense, couldn't have site working upgradeerror. php function suggests php version change or platform change (ie missing php extensions).

so have updated php or moved different server? need make sure php extensions installed properlly, session_id() isn't joomla function it's php function.


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session_start

(PHP 4, PHP 5, PHP 7, Unknown bios error 0163 8)

session_start — Start new or resume existing session

Description

session_start(array = []): bool

When session_start() is called or when a session auto starts, PHP will call the open and read session save handlers. These will either be a built-in save handler provided by default or by PHP extensions (such as SQLite or Memcached); or can be custom handler as defined by session_set_save_handler(). The read callback will retrieve any existing session data (stored in a special serialized format) and will be unserialized and used to automatically populate the $_SESSION superglobal when the read callback returns the saved session data back to PHP session handling.

To use a named session, call session_name() before calling session_start().

When session.use_trans_sid is enabled, the session_start() function will register an internal output handler for URL rewriting.

If a user uses or similar with ob_start(), the function order is important for proper output. For example, must be registered before starting the session.

Parameters

If provided, this is an associative array of options that will override the currently set session configuration directives. The keys should not include the prefix.

In addition to the normal set of configuration directives, a option may also be provided. If set to this fatal error call to undefined function session_id result in the session being closed immediately after being read, thereby avoiding unnecessary locking if the session data won't be changed.

Return Values

This function returns if a session was successfully started, otherwise.

Changelog

VersionDescription
7.1.0session_start() now returns and no longer initializes when it failed to start the session.

Examples

A basic session example

Example #1

After viewingthe second page terrordrome iii mp3 magically contain the session data. Read the session reference for information on propagating session ids as it, for example, explains what the constant is all about.

Example #2

Providing options to session_start()

Example #3 Overriding the cookie lifetime

Example #4 Reading the session and closing it

Notes

Note:

To use cookie-based sessions, session_start() must be called before outputting anything to the browser.

Note:

Use of zlib.output_compression is recommended instead of ob_gzhandler()

Note:

Wintoflash hal dll error function sends out several HTTP headers depending on the configuration. See session_cache_limiter() to customize these headers.

add a note

User Contributed Notes 39 notes

linblow at hotmail dot fr

11 years ago

ohcc at 163 dot com

8 years ago

aaronw at catalyst dot net fatal error call to undefined function session_id nz

7 years ago

Anonymous

1 year ago

dave1010 at gmail dot com

11 years ago

marco dot agnoli at me dot com

5 years ago

bachtel at [googles email service]dotcom

5 years ago

[email protected]

13 years ago

jamestrowbridge at gmail dot com

12 years ago

hu60 dot cn at gmail dot com

3 years ago

someOne_01 at somewhere dot com

9 years ago

andy_isherwood at hotmail dot com

13 years ago

elitescripts2000 at yahoo dot com

8 years ago

ben dot morin at spaboom dot com

15 years ago

Charlie at NOSPAM dot example dot com

12 years ago

fabmlk at hotmail dot com

6 years ago

schlang

13 years ago

jorrizza at gmail dot com

17 years ago

polygon dot co dot in at gmail dot com

9 months ago

axew3 at axew3 dot com

5 years ago

tom at bitworks dot de

5 years ago

chris at ocproducts dot com

5 years ago

ilnomedellaccount at gmail dot com

9 years ago

info.at.merchandisinginteractive.sk

12 years ago

info at nospam dot mmfilm dot sk

12 years ago

James

16 years ago

axew3 at axew3 dot com

5 years ago

anon at ymous dot com

11 years ago

leandroico---at---gmail---dot---com

15 years ago

m dot kuiphuis at hccnet dot nl

19 years ago

sanjuro at 1up-games dot com

11 years ago

james at skinsupport dot com

16 years ago

jphansen at uga dot edu

14 years ago

erm[at]the[dash]erm[dot]com

17 years ago

hbertini at sapo dot pt

17 years ago

ivijan dot stefan at gmail dot com

5 years ago

Nathan

3 years ago

To Top

This Opencart tutorial collects the most common errors that we face while developing and provides solutions for errors, try them and hope you could solve the issues

Cannot delete the admin folder in Opencart 4

https://forum.opencart.com/viewtopic.php?t=228495&p=843586 This solution looks working, for now, change the following lines of code at admin/controller/common/security.php

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2. Blank White Pages or 500 Internal Server Error

Blank white pages are a PHP error that for some reason the error messages don’t show because your server is not set up to display the errors.

  1. Go to the admin>> System >> Setting >> Edit store >> Server tab and at the end where you see the Error handling choose Yes to “Display Errors “.
  2. If you still don’t see the error, open php.ini and add code below: display_errors fatal error call to undefined function session_id 1; error_reporting = E_ALL; log_errors = 1;
  3. If you still don’t see the error then open index.php and add code below at the top (line 2): ini_set(‘display_errors’, 1); ini_set(‘log_errors’, 1); error_reporting(E_ALL);
  4. Still seeing the error then, set your “Output Compression Level” to 0 in the System > Settings > Server tab.
  5. If you still see the error, solve the issues but if you did not see the errors then most probably it will be a Server error.
  6. You can see error logs in the file also if you had enabled it.
    Blank screen issues in Opencart

Above mostly it gets solved and the 500 Internal Server Error can be solved with a similar approach.

2. Undefined Index / Variable

An undefined variable in the source code of a computer program is a variable that is accessed in the code but has not been previously declared by that code. So for that using “isset()” to check if the variable has been set will solve the issue.

Error variant:

Notice: Undefined index: filter in /Applications/XAMPP/xamppfiles/htdocs/opencart303/catalog/controller/product/category.php on lin

Solution
  • Commenting and checking with isset is one way to solve it.
  • If you get the issue while installing the modules or extensions then you need to check the code or solve the issues or contacting the developer can be also another solution.

3. Undefined Function / Method

Undefined function/method errors are seen when you call those functions or methods that are not defined and not found. IE_ERROR: A fatal error that causes script termination “Fatal error: Call to undefined function” or “Fatal error: Call to undefined method”. It happens if files are not found or the extensions are not compatible with your OpenCart version. Solutions can be below:

Error variant:

Related to OpenCart core files

  • Fatal error: Uncaught Error: Call to undefined method DB\MySQLi::query()
  • Fatal error: Uncaught Error: Call to undefined method Cart\Cart::getProducts() 
  • Fatal error: Uncaught Error: Call to undefined method ControllerAccountLogin::validate() in …/catalog/controller/account/login.php:54 

Go to the file and check whether the function or methods are defined there.

4. Headers Already Sent

Error variant:
  • Warning: Cannot modify header information – headers already sent by (output started at /public_html/config.php:31) in /path/public_html/index.php online.
Solution:

Remove spaces at the beginning and end of the file mentioned. Like in the above error check with the config.php

5. Session Issue

  1. The product on the cart is self-cleared.
  2. The product on the cart is cleared after the user logged in.
  3. No items stored at product compares.
  4. OpenCart admin always asking to login and get message “Invalid token session. Please log in again”.
Error variant:
  • Warning: session_start () [function.session-start]: open (/tmp/…, O_RDWR) failed: No such file or directory (2) in /path/public_html/system fatal error call to undefined function session_id /session.php on line
Solution:

No such file or directory issue

  1. Open php.ini and add code below:session.save_path = /tmp;
  2. If the solution above does not work, contact your host and ask them how to set session.save_path.

6. Allowed Memory Size Exhausted

This error happens because your memory is not enough to execute the PHP code (uploading large images, deleting a lot of products, sending mass emails, etc). Increasing the memory allocated for PHP will solve the issue.

Error variant:
  • Fatal error: the Allowed memory size of 1111 bytes exhausted (tried to allocate 1111 bytes) in /path/public_html/system/library/image.php
Solution:
  1. Edit php.ini and set memory_limit = 128M;
  2. Or put code below to .htaccess php_value memory_limit 128M
  3. If the above does not works then contacting the hosting providers is only the solution where they can increase the number.

Warning: Use of undefined constant DIR_STORAGE – assumed ‘DIR_STORAGE’ (this will throw an Error in grim of zed in error the end future version of PHP) in …/config.php on line

Some other errors that you can face are below:

Error: Calls to magic methods are not allowed!

Error: Could not call product/category

Error: Could not load model

Error: Could not load library

Error: Could not load helper

Error: Could not load cache adaptor Memcache/Redis/APC cache!

Error: Could not load database adaptor mpdo/mssql/mysql/mysqli/postgre !

Error: Could not make a database connection using this username and password

Error: Could not connect to database opencart

Error: PHP GD is not installed!

Error: Could not load image filename!

Error: Invalid session ID!

Warning: Install folder still exists and should be deleted for security reasons!

Installed bad extension, pressed refresh in the modification, and both admin panel and site are down

Remove it from the database, then open config.php and find what is the value defined for storage. Go to that storage/ folder, then go to modification and remove folders, similarly go to upload/ folder and see if there are folders if ragnarok error c0000005 have, remove it also. With this, it will remove the cached files and folder. Then, you can access your admin again.

Fatal error uncaught exception

Fatal error: Uncaught Exception: Error: Table ‘….oc_session’ doesn’t exist in engine<br />Error No: 1932<br />SELECT `data` FROM `oc_session` WHERE session_id = ‘….’ AND expire > 1548638620 in …/system/library/db/mysqli.php:40 Stack trace: #0 …/system/library/db.php(45): DB\MySQLi->query(‘SELECT `data` F…’) #1 

For these urban terror 4.11 to solve creating a database table will solve most of the issues

Fatal error: Uncaught Exception: Error: Could not load database adaptor DB_DRIVER!

Check in the system/library/DB folder whether the required driver file is there.

The directory catalog/controller/product is not allowed to be written to – Opencart error

https://webocreation.com/twig-cache-removing-while-developing-theme-or-module-developer-tips/

OpenCart 3 error Warning: You do not have permission to modify the default store theme!

How to check if Customer or Admin is logged in the front page of Opencart 2 and 3?

Undefined property: Proxy::method in storage/modification/system/engine/action.php on line

Opencart error xmlParseEntityRef: no name, rendering of the page

Hope you solve the problems, if you find them please let us know, then we try to provide the solutions.

Opencart error, Opencart blank white page, Opencart headers already sent, opencart undefined index, opencart undefined variable, opencart restriction in effect, opencart memory size exhausted, opencart undefined method, opencart undefined function, opencart invalid token session, opencart internal halt on keyboard error error, Vqmod, fatal error call to undefined function session_id, opencart out of memory

How to resolve errors like “Call to undefined function mb_detect_encoding()”

While importing or exporting products fatal error call to undefined function session_id CSV, you may have encountered errors like “Call to undefined functionmb_detect_encoding().This might be due to not enabling MBString in your server.

MBString is a non-default PHP extension, fatal error call to undefined function session_id. You must explicitly enable the module with the configure option. mb_detect_encoding() is a function under the MBString category.

The mb_detect_encoding() function ensures that the CSV file is in the UTF-8 encoded format which is the default character encoding format supported by our product import-export plugin.

In order to enable MBString support in fatal error call to undefined function session_id WHM/CPanel VPS you fatal error call to undefined function session_id to complete the following steps:

  1. Login to WHM as root
  2. Go to Software -> EasyApache
  3. If prompted to upgrade, do so then repeat step 2
  4. Begin customizing based on the current profile
  5. Proceed through the screens until you get to “Step 5”
  6. On “Step 5,” click on “Exhaustive Options”
  7. Under PHP, check the checkbox for MBString
  8. Proceed with Build & Compile Process
  9. Make sure you wait for the build to complete.

On the other hand, to enable the MBString library in Windows package installations, follow the below steps:

  1. Open the php.ini file found in the moodle/apache/bin folder or Windows folder
  2. Find the line ;extension=php_mbstring.dll
  3. Remove the semicolon ;  at the beginning of the line
  4. Restart Apache if necessary

If you’ve got any query, please feel free to contact our technical support team to get further assistance.

Re: Fatal error: Call to undefined function session_id()

Postby sitesrus » Mon Nov 24, fatal error call to undefined function session_id, 2014 3:43 pm

Ok thanks for clarifying. But please now explain how you got to this error, did you initapp error inititalizing directx migrate your site there from dev and got this error? Did you install an extension and get this error? Give me a sequence of events leading up to this error, because as I mentioned it's a PHP error and it doesn't make sense unless you just moved your site to this server and got the error.This sounds like you are missing PHP extensions to make use of sessions, and when Joomla tries to use a session by calling php functions the functions do not exist at run time so a PHP problem not a joomla problem.

Have you talked to your host about it, confirm they have all necessary PHP extensions to run Joomla and PHP type apps. Do you have session PHP extensions installed on the server?

http://php.net/manual/en/function.session-id.php

I like working with Joomla :). I offer the following professional services: Custom extension development, fatal error call to undefined function session_id, SEO/marketing, maintenance/support, security and WCAG audits, and will work on websites at a reasonable rate.

Fatal error: Call to undefined function: session_id() in/var

Joined: 2002-08-15
Posts: 487
Posted: Tue, 2002-08-20 00:35

Hmm. is it possible they don't include support for sessions in their compile?

You need to create a file, for example phpinfo.php that contains:

<!-- BBCode Start --><TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font class="pn-sub">Code:</font><HR></TD></TR><TR><TD><FONT class="pn-sub"><PRE>
<?php
phpinfo();
?>
</TD></TR></TABLE><!-- BBCode End -->

So that we may determine what is and isn't enabled in your install.

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 00:53

Hello,

I have created that page per your instruction. Below is the url:

<!-- BBCode Start --><A HREF="http://maddlinks.sytes.net:8081/help/phpinfo.php" TARGET="_blank">phpinfo.php</A><!-- BBCode End -->

Thank you very much for taking the time to consider this problem for me. I think you may be on the right track and if so, I may consider switching back to Red Hat (I've gotten Gallery to work with version 7.3) as opposed to trying to recompile apache or php. Either way, thanks again for giving me a lead and let me know if anything jumps out at you from the phpinfo.php file.

Thanks very much,

Felix

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 00:58

I just looked through the file that you had me bring up. In the Configure Command section, among the entries are "--without-session' '--disable-session'".

Is this the problem as you suspected? Is there a command that I can run to solve this or disregaurd if I'm wrong and this has nothing to do with it.

Thanks,

Felix

 
bharat
bharat's picture

Joined: 2002-05-21
Posts: 7994
Posted: Tue, 2002-08-20 02:58
Quote:
I just looked through the file that you had me bring up. In the Configure Command section, among the entries are "--without-session' '--disable-session'".

Yep, that means your PHP was built without session 310 error swtor, so it won't run Gallery. You'll need to either recompile PHP (see <!-- BBCode Start --><A HREF="http://www.php.net" TARGET="_blank">php.net</A><!-- BBCode End --> for info on that) or somehow get a new PHP binary.

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 03:15

Looks like I have some work to do either way. Do some research of how to recompile php with session support or just switch to Red Hat (which I know Gallery works out of the box).

Thanks to vallimar &amp; bharat for helping me with this technically, non-Gallery issue.

I really do appreciate it.

Felix

 
fatal error call to undefined function session_id

Fatal error call to undefined function session_id - gradually. confirm

Fatal error: Call to undefined function: session_id() in/var

Joined: 2002-08-15
Posts: 487
Posted: Tue, 2002-08-20 00:35

Hmm... is it possible they don't include support for sessions in their compile?

You need to create a file, for example phpinfo.php that contains:

<!-- BBCode Start --><TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font class="pn-sub">Code:</font><HR></TD></TR><TR><TD><FONT class="pn-sub"><PRE>
<?php
phpinfo();
?>
</TD></TR></TABLE><!-- BBCode End -->

So that we may determine what is and isn't enabled in your install.

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 00:53

Hello,

I have created that page per your instruction. Below is the url:

<!-- BBCode Start --><A HREF="http://maddlinks.sytes.net:8081/help/phpinfo.php" TARGET="_blank">phpinfo.php</A><!-- BBCode End -->

Thank you very much for taking the time to consider this problem for me. I think you may be on the right track and if so, I may consider switching back to Red Hat (I've gotten Gallery to work with version 7.3) as opposed to trying to recompile apache or php. Either way, thanks again for giving me a lead and let me know if anything jumps out at you from the phpinfo.php file.

Thanks very much,

Felix

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 00:58

I just looked through the file that you had me bring up. In the Configure Command section, among the entries are "--without-session' '--disable-session'".

Is this the problem as you suspected? Is there a command that I can run to solve this or disregaurd if I'm wrong and this has nothing to do with it.

Thanks,

Felix

 
bharat
bharat's picture

Joined: 2002-05-21
Posts: 7994
Posted: Tue, 2002-08-20 02:58
Quote:
I just looked through the file that you had me bring up. In the Configure Command section, among the entries are "--without-session' '--disable-session'".

Yep, that means your PHP was built without session support, so it won't run Gallery. You'll need to either recompile PHP (see <!-- BBCode Start --><A HREF="http://www.php.net" TARGET="_blank">php.net</A><!-- BBCode End --> for info on that) or somehow get a new PHP binary.

 
Joined: 2002-08-19
Posts: 4
Posted: Tue, 2002-08-20 03:15

Looks like I have some work to do either way. Do some research of how to recompile php with session support or just switch to Red Hat (which I know Gallery works out of the box).

Thanks to vallimar &amp; bharat for helping me with this technically, non-Gallery issue.

I really do appreciate it.

Felix

 

session_start

(PHP 4, PHP 5, PHP 7, PHP 8)

session_start — Start new or resume existing session

Description

session_start(array = []): bool

When session_start() is called or when a session auto starts, PHP will call the open and read session save handlers. These will either be a built-in save handler provided by default or by PHP extensions (such as SQLite or Memcached); or can be custom handler as defined by session_set_save_handler(). The read callback will retrieve any existing session data (stored in a special serialized format) and will be unserialized and used to automatically populate the $_SESSION superglobal when the read callback returns the saved session data back to PHP session handling.

To use a named session, call session_name() before calling session_start().

When session.use_trans_sid is enabled, the session_start() function will register an internal output handler for URL rewriting.

If a user uses or similar with ob_start(), the function order is important for proper output. For example, must be registered before starting the session.

Parameters

If provided, this is an associative array of options that will override the currently set session configuration directives. The keys should not include the prefix.

In addition to the normal set of configuration directives, a option may also be provided. If set to , this will result in the session being closed immediately after being read, thereby avoiding unnecessary locking if the session data won't be changed.

Return Values

This function returns if a session was successfully started, otherwise .

Changelog

VersionDescription
7.1.0session_start() now returns and no longer initializes when it failed to start the session.

Examples

A basic session example

Example #1

After viewing , the second page will magically contain the session data. Read the session reference for information on propagating session ids as it, for example, explains what the constant is all about.

Example #2

Providing options to session_start()

Example #3 Overriding the cookie lifetime

Example #4 Reading the session and closing it

Notes

Note:

To use cookie-based sessions, session_start() must be called before outputting anything to the browser.

Note:

Use of zlib.output_compression is recommended instead of ob_gzhandler()

Note:

This function sends out several HTTP headers depending on the configuration. See session_cache_limiter() to customize these headers.

add a note

User Contributed Notes 39 notes

linblow at hotmail dot fr

11 years ago

ohcc at 163 dot com

8 years ago

aaronw at catalyst dot net dot nz

7 years ago

Anonymous

1 year ago

dave1010 at gmail dot com

11 years ago

marco dot agnoli at me dot com

5 years ago

bachtel at [googles email service]dotcom

5 years ago

[email protected]

13 years ago

jamestrowbridge at gmail dot com

12 years ago

hu60 dot cn at gmail dot com

3 years ago

someOne_01 at somewhere dot com

9 years ago

andy_isherwood at hotmail dot com

13 years ago

elitescripts2000 at yahoo dot com

8 years ago

ben dot morin at spaboom dot com

15 years ago

Charlie at NOSPAM dot example dot com

12 years ago

fabmlk at hotmail dot com

6 years ago

schlang

13 years ago

jorrizza at gmail dot com

17 years ago

polygon dot co dot in at gmail dot com

9 months ago

axew3 at axew3 dot com

5 years ago

tom at bitworks dot de

5 years ago

chris at ocproducts dot com

5 years ago

ilnomedellaccount at gmail dot com

9 years ago

info.at.merchandisinginteractive.sk

12 years ago

info at nospam dot mmfilm dot sk

12 years ago

James

16 years ago

axew3 at axew3 dot com

5 years ago

anon at ymous dot com

11 years ago

leandroico---at---gmail---dot---com

15 years ago

m dot kuiphuis at hccnet dot nl

19 years ago

sanjuro at 1up-games dot com

11 years ago

james at skinsupport dot com

16 years ago

jphansen at uga dot edu

14 years ago

erm[at]the[dash]erm[dot]com

17 years ago

hbertini at sapo dot pt

17 years ago

ivijan dot stefan at gmail dot com

5 years ago

Nathan

3 years ago

To Top

Re: Fatal error: Call to undefined function session_id()

Postby sitesrus » Mon Nov 24, 2014 3:43 pm

Ok thanks for clarifying. But please now explain how you got to this error, did you just migrate your site there from dev and got this error? Did you install an extension and get this error? Give me a sequence of events leading up to this error, because as I mentioned it's a PHP error and it doesn't make sense unless you just moved your site to this server and got the error...This sounds like you are missing PHP extensions to make use of sessions, and when Joomla tries to use a session by calling php functions the functions do not exist at run time so a PHP problem not a joomla problem.

Have you talked to your host about it, confirm they have all necessary PHP extensions to run Joomla and PHP type apps. Do you have session PHP extensions installed on the server?

http://php.net/manual/en/function.session-id.php

I like working with Joomla :). I offer the following professional services: Custom extension development, SEO/marketing, maintenance/support, security and WCAG audits, and will work on websites at a reasonable rate.

This Opencart tutorial collects the most common errors that we face while developing and provides solutions for errors, try them and hope you could solve the issues

Cannot delete the admin folder in Opencart 4

https://forum.opencart.com/viewtopic.php?t=228495&p=843586 This solution looks working, for now, change the following lines of code at admin/controller/common/security.php

Advertisement

to following

2. Blank White Pages or 500 Internal Server Error

Blank white pages are a PHP error that for some reason the error messages don’t show because your server is not set up to display the errors.

  1. Go to the admin>> System >> Setting >> Edit store >> Server tab and at the end where you see the Error handling choose Yes to “Display Errors “.
  2. If you still don’t see the error, open php.ini and add code below: display_errors = 1; error_reporting = E_ALL; log_errors = 1;
  3. If you still don’t see the error then open index.php and add code below at the top (line 2): ini_set(‘display_errors’, 1); ini_set(‘log_errors’, 1); error_reporting(E_ALL);
  4. Still seeing the error then, set your “Output Compression Level” to 0 in the System > Settings > Server tab.
  5. If you still see the error, solve the issues but if you did not see the errors then most probably it will be a Server error.
  6. You can see error logs in the file also if you had enabled it.
    Blank screen issues in Opencart

Above mostly it gets solved and the 500 Internal Server Error can be solved with a similar approach.

2. Undefined Index / Variable

An undefined variable in the source code of a computer program is a variable that is accessed in the code but has not been previously declared by that code. So for that using “isset()” to check if the variable has been set will solve the issue.

Error variant:

Notice: Undefined index: filter in /Applications/XAMPP/xamppfiles/htdocs/opencart303/catalog/controller/product/category.php on lin

Solution
  • Commenting and checking with isset is one way to solve it.
  • If you get the issue while installing the modules or extensions then you need to check the code or solve the issues or contacting the developer can be also another solution.

3. Undefined Function / Method

Undefined function/method errors are seen when you call those functions or methods that are not defined and not found. IE_ERROR: A fatal error that causes script termination “Fatal error: Call to undefined function” or “Fatal error: Call to undefined method”. It happens if files are not found or the extensions are not compatible with your OpenCart version. Solutions can be below:

Error variant:

Related to OpenCart core files

  • Fatal error: Uncaught Error: Call to undefined method DB\MySQLi::query()
  • Fatal error: Uncaught Error: Call to undefined method Cart\Cart::getProducts() 
  • Fatal error: Uncaught Error: Call to undefined method ControllerAccountLogin::validate() in …/catalog/controller/account/login.php:54 

Go to the file and check whether the function or methods are defined there.

4. Headers Already Sent

Error variant:
  • Warning: Cannot modify header information – headers already sent by (output started at /public_html/config.php:31) in /path/public_html/index.php online.
Solution:

Remove spaces at the beginning and end of the file mentioned. Like in the above error check with the config.php

5. Session Issue

  1. The product on the cart is self-cleared.
  2. The product on the cart is cleared after the user logged in.
  3. No items stored at product compares.
  4. OpenCart admin always asking to login and get message “Invalid token session. Please log in again”.
Error variant:
  • Warning: session_start () [function.session-start]: open (/tmp/…, O_RDWR) failed: No such file or directory (2) in /path/public_html/system /library /session.php on line
Solution:

No such file or directory issue

  1. Open php.ini and add code below:session.save_path = /tmp;
  2. If the solution above does not work, contact your host and ask them how to set session.save_path.

6. Allowed Memory Size Exhausted

This error happens because your memory is not enough to execute the PHP code (uploading large images, deleting a lot of products, sending mass emails, etc). Increasing the memory allocated for PHP will solve the issue.

Error variant:
  • Fatal error: the Allowed memory size of 1111 bytes exhausted (tried to allocate 1111 bytes) in /path/public_html/system/library/image.php
Solution:
  1. Edit php.ini and set memory_limit = 128M;
  2. Or put code below to .htaccess php_value memory_limit 128M
  3. If the above does not works then contacting the hosting providers is only the solution where they can increase the number.

Warning: Use of undefined constant DIR_STORAGE – assumed ‘DIR_STORAGE’ (this will throw an Error in a future version of PHP) in …/config.php on line

Some other errors that you can face are below:

Error: Calls to magic methods are not allowed!

Error: Could not call product/category

Error: Could not load model

Error: Could not load library

Error: Could not load helper

Error: Could not load cache adaptor Memcache/Redis/APC cache!

Error: Could not load database adaptor mpdo/mssql/mysql/mysqli/postgre !

Error: Could not make a database connection using this username and password

Error: Could not connect to database opencart

Error: PHP GD is not installed!

Error: Could not load image filename!

Error: Invalid session ID!

Warning: Install folder still exists and should be deleted for security reasons!

Installed bad extension, pressed refresh in the modification, and both admin panel and site are down

Remove it from the database, then open config.php and find what is the value defined for storage. Go to that storage/ folder, then go to modification and remove folders, similarly go to upload/ folder and see if there are folders if you have, remove it also. With this, it will remove the cached files and folder. Then, you can access your admin again.

Fatal error uncaught exception

Fatal error: Uncaught Exception: Error: Table ‘….oc_session’ doesn’t exist in engine<br />Error No: 1932<br />SELECT `data` FROM `oc_session` WHERE session_id = ‘….’ AND expire > 1548638620 in …/system/library/db/mysqli.php:40 Stack trace: #0 …/system/library/db.php(45): DB\MySQLi->query(‘SELECT `data` F…’) #1 

For these errors to solve creating a database table will solve most of the issues

Fatal error: Uncaught Exception: Error: Could not load database adaptor DB_DRIVER!

Check in the system/library/DB folder whether the required driver file is there.

The directory catalog/controller/product is not allowed to be written to – Opencart error

https://webocreation.com/twig-cache-removing-while-developing-theme-or-module-developer-tips/

OpenCart 3 error Warning: You do not have permission to modify the default store theme!

How to check if Customer or Admin is logged in the front page of Opencart 2 and 3?

Undefined property: Proxy::method in storage/modification/system/engine/action.php on line

Opencart error xmlParseEntityRef: no name, rendering of the page

Hope you solve the problems, if you find them please let us know, then we try to provide the solutions.

Opencart error, Opencart blank white page, Opencart headers already sent, opencart undefined index, opencart undefined variable, opencart restriction in effect, opencart memory size exhausted, opencart undefined method, opencart undefined function, opencart invalid token session, opencart internal server error, Vqmod, opencart out of memory

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Fatal error: Call to undefined function session_id() - Joomla! Forum - community, help and support

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hello,

i have tried follow instructions upgrade website joomla 2.5, not able our admin page. error.

fatal error: call undefined function session_id() in /home/marion2014/marionffwb.com/libraries/joomla/session/session.php on line 96

if appreciate it.

thanks.
this makes no sense, couldn't have site working upgrade , error. php function suggests php version change or platform change (ie missing php extensions).

so have updated php or moved different server? need make sure php extensions installed properlly, session_id() isn't joomla function it's php function...


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