How Can I Catch PHP Fatal Errors Using `register_shutdown_function()`?

Catching PHP Fatal Errors

PHP's set_error_handler() often falls short when attempting to capture fatal errors (E_ERROR). This becomes especially problematic when working with non-existent function calls or other instances that trigger fatal errors.

To work around this limitation, you can utilize PHP's register_shutdown_function() for versions 5.2 . The following code snippet demonstrates its implementation:

register_shutdown_function("fatal_handler");

function fatal_handler() {
    $errfile = "unknown file";
    $errstr = "shutdown";
    $errno = E_CORE_ERROR;
    $errline = 0;

    $error = error_get_last();

    if ($error !== NULL) {
        $errno = $error["type"];
        $errfile = $error["file"];
        $errline = $error["line"];
        $errstr = $error["message"];

        error_mail(format_error($errno, $errstr, $errfile, $errline));
    }
}

To complete the solution, define the error_mail and format_error functions. Here's an example:

function format_error($errno, $errstr, $errfile, $errline) {
    // Code to format and display error information goes here
}

Consider employing Swift Mailer for the error_mail functionality.

For additional reference, explore the following resources:

• $php_errormsg
• Predefined Constants

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