PHP error reporting decoder

phperrorreporting

#!/usr/bin/env php                                                                                                                                                                                                                                           
<?php

// Found: https://stackoverflow.com/a/4678125
                                                                                                                                                                                                                                                             
if (!isset($argv[1])) {                                                                                                                                                                                                                                      
    echo <<<EXAMPLE                                                                                                                                                                                                                                          
There is error reporting provided.

    Usage: phperrorreporting 22527


EXAMPLE;

    exit(2);
}

$error_reporting_value = trim($argv[1]);


if (!is_numeric($error_reporting_value)) {
    echo <<<EXAMPLE
Invalid error reporting.

EXAMPLE;

    exit(3);
}

$error_reporting_value = (int)$error_reporting_value;


if ($error_reporting_value < 0) {
    echo <<<EXAMPLE
Invalid error reporting.

EXAMPLE;

    exit(4);
}

$constants = array(
    "E_ERROR",
    "E_WARNING",
    "E_PARSE",
    "E_NOTICE",
    "E_CORE_ERROR",
    "E_CORE_WARNING",
    "E_COMPILE_ERROR",
    "E_COMPILE_WARNING",
    "E_USER_ERROR",
    "E_USER_WARNING",
    "E_USER_NOTICE",
    "E_STRICT",
    "E_RECOVERABLE_ERROR",
    "E_DEPRECATED",
    "E_USER_DEPRECATED",
    "E_ALL"
);
$included = array();
$excluded = array();
foreach ($constants as $constant) {
    $value = constant($constant);
    if (($error_reporting_value & $value) === $value) {
        $included[] = $constant;
    } else {
        $excluded[] = $constant;
    }
}
echo "error reporting " . $error_reporting_value . PHP_EOL;
echo "includes " . implode(", ", $included) . PHP_EOL;
echo "excludes " . implode(", ", $excluded) . PHP_EOL;