View PHP server-related global variables from command line or browser

view_globals.php

<?php

/**
 * Author: Anthony Vipond
 * Tested on: PHP 5.5
 */

$global_indexes = ['SERVER', 'ENV', 'SESSION', 'REQUEST', 'COOKIE', 'GET', 'POST', 'FILES'];

if (php_sapi_name() !== 'cli') { 
    echo "<pre>"; 
}

foreach ($global_indexes as $index) {
    if (isset($GLOBALS['_' . $index])) {
        $global = $GLOBALS['_' . $index];
    } else {
        $global = '$GLOBAL["' . $index . '"] is not set';
    }

    print '$_' . $index . ': ' . PHP_EOL;
    
    print_r($global);

    if (php_sapi_name() !== 'cli') { 
        echo "<hr/>"; 
    } else {
        print "---------\n";
    }
}