[wp-trac] [WordPress Trac] #57876: class WP_Fatal_Error_Handler can not handle memory limit errors

[WordPress Trac]

#57876: class WP_Fatal_Error_Handler can not handle memory limit errors
----------------------------+------------------------------
 Reporter:  amisiewicz      |       Owner:  (none)
     Type:  enhancement     |      Status:  new
 Priority:  normal          |   Milestone:  Awaiting Review
Component:  Bootstrap/Load  |     Version:  trunk
 Severity:  minor           |  Resolution:
 Keywords:  close           |     Focuses:  performance
----------------------------+------------------------------
Changes (by amisiewicz):

 * keywords:  dev-feedback => close


Comment:

 I couldn't find any information on that topic. I just tested it out
 manually with this simple script:

 {{{#!php
 <?php
 // Set the memory limit to a low value for testing purposes
 ini_set('memory_limit', '5M');
 // Disable error display
 ini_set('display_errors', 'Off');

 // Define the shutdown function
 function shutdown_function() {
     $error = error_get_last();
     // still works in php5.6
     $some_more_memory = range(1, 2000);
     // do not work in php5.6
     // $some_more_memory = range(1, 3000);
     // still works in php7.4 and php8.1
     // $some_more_memory = range(1, 60000);
     // do not work in php7.4 and php8.1
     // $some_more_memory = range(1, 70000);

     if ($error !== null) {
         $message = "The script has been shut down due to an error:
 {$error['message']}\n";
     }
     echo $message;
 }

 // Register the shutdown function
 register_shutdown_function('shutdown_function');

 // Allocate an array that exceeds the memory limit
 $large_array = range(1, 1000000);
 }}}

 My conclusion is that this is not a problem. We can still assign some
 variables (less memory to assign in php5.6, more in php7 and above), but
 php can still do it. I'm not sure why the monolog library does what it
 does.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57876#comment:2>
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