PHP Error Handling Closure

php_error_handling_closure.php

<?php

// A closure to store error information in an array

$errors = array();

$errorCallback = function($severity, $message, $file = null, $line = null, $context = null) use (&$errors) {

    $normalizeSeverity = function() use ($severity) {
        $severityMap = array(
            E_WARNING => 'E_WARNING',
            E_NOTICE => 'E_NOTICE',
            E_USER_ERROR => 'E_USER_ERROR',
            E_USER_WARNING => 'E_USER_WARNING',
            E_USER_NOTICE => 'E_USER_NOTICE',
            E_USER_DEPRECATED => 'E_USER_DEPRECATED',
            E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
            E_DEPRECATED => 'E_DEPRECATED'
        );
        if (\array_key_exists($severity, $severityMap)) {
            return $severityMap[$severity];
        }
        return 'E_UNKOWN_SEVERITY';
    };

    $index = \count($errors);
    $errors[$index]['severity'] = $normalizeSeverity();
    $errors[$index]['message'] = $message;
    $errors[$index]['file'] = $file;
    $errors[$index]['line'] = $line;

    // here to return an error if improper type hints are passed
    $unhandledSeverity = array(E_RECOVERABLE_ERROR);
    if (\in_array($severity, $unhandledSeverity)) {
        return false;
    }

};

\set_error_handler($errorCallback);