Stop script execution upon notice/warning

Question

Is it possible to have PHP stop execution upon a notice/warning, globally?

We run a development server with a lot of sites on, but want to force our developers to fi

Answer 1

The other solutions implement a custom error handler which overrides the default error logging mechanism. That means when we set a custom error handler, the notice / warning is not printed anymore in the default way, so we change more than just "stop script execution upon notice / warning".

However, I needed a way to still print the message - in my case in PHP CLI - since the output is then parsed by another program. So I didn't want to print the message in some way but in the exact same way than PHP usually does it. I just wanted to stop the PHP CLI process with an exit code of != 0 right after a notice / warning was printed, and do not change anything else.

Unfortunately, there does not seem to be a default way of exiting the script without changing the whole error handling. So I needed to reimplement the default error handler (which is implemented in C) in PHP.

For this, I looked into the default error printing mechanism in PHP's source code and ported the relevant pieces from C to PHP to get the following error handler, which I want to share with you in case you need something similar:

set_error_handler(
    function($errNo, $errStr, $errFile, $errLine) {
        $error_type_str = 'Error';
        // Source of the switch logic: default error handler in PHP's main.c
        switch ($errNo) {
            case E_ERROR:
            case E_CORE_ERROR:
            case E_COMPILE_ERROR:
            case E_USER_ERROR:
                $error_type_str = "Fatal error";
                break;
            case E_RECOVERABLE_ERROR:
                $error_type_str = "Recoverable fatal error";
                break;
            case E_WARNING:
            case E_CORE_WARNING:
            case E_COMPILE_WARNING:
            case E_USER_WARNING:
                $error_type_str = "Warning";
                break;
            case E_PARSE:
                $error_type_str = "Parse error";
                break;
            case E_NOTICE:
            case E_USER_NOTICE:
                $error_type_str = "Notice";
                break;
            case E_STRICT:
                $error_type_str = "Strict Standards";
                break;
            case E_DEPRECATED:
            case E_USER_DEPRECATED:
                $error_type_str = "Deprecated";
                break;
            default:
                $error_type_str = "Unknown error";
                break;
        }
        fwrite(STDERR, "PHP $error_type_str:  $errStr in $errFile on line $errLine\n");
        exit(1);
    },
    E_ALL
);