isDrupalReady.php

<?php

function val($x) {
    if($x === true) { return 'on'; }
    elseif($x === false) { return 'off'; }
    else { return (string)$x; }
}


function isDrupalReady() {
    $result = true;
    $errors = array();

    $required_exts = array(
        array('mysql', 'mysqli', 'pdo_mysql'),
        'curl',
        'gd',
        'json',
        'mbstring',
        'openssl',
        'pcre',
        'pdo',
        'SimpleXML',
        'xml',
        'xmlrpc',
    );

    $required_ini = array(
        'mbstring.http_input' => array('pass', ''),
        'magic_quotes_gpc' => array(false, NULL, ''),
        'safe_mode' => array(false, NULL, ''),
        'register_globals' => array(false, NULL, ''),
        'session.auto_start' => 0,
        'session.cache_limiter' => 'nocache',

    );

    foreach($required_exts as $ext) {
        if(!is_array($ext)) {
            if(!extension_loaded($ext)) {
                $result = false;
                $errors[] = "Missing PHP extension $ext";
            }
        } else {
            $found = 0;
            foreach($ext as $i) {
                if(extension_loaded($i)) { $found++; }
            }
            if($found == 0) {
                $result = false;
                $errors[] = "One of the following extensions should be present: " . implode(',', $ext);
            }
        }
    }

    foreach($required_ini as $ini => $val) {
        $current = ini_get($ini);

        if(!is_array($val)) {
            if(is_numeric($val)) {
                if($current < $val) {
                    $result = false;
                    $errors[] = sprintf("Drupal.org recommends %s to set minimum %s", $ini, $val);
                }
            } else {
                if($current !== $val) {
                    $result = false;
                    $errors[] = sprintf("Drupal.org recommends %s to set %s value", $ini, val($val));
                }
            }
        } else {
            if(!in_array($current, $val)) {
                $result = false;
                $errors[] = sprintf("Drupal.org recommends %s to be set one of these values: %s", $ini, join(', ', $val));
            }
        }
    }

    return array('result' => $result, 'errors' => $errors);
}

$readiness = isDrupalReady();
$php_version = phpversion();

if($readiness['result'] == true) {
    echo "Your PHP {$php_version} installation is Drupal-ready!" . PHP_EOL;
} else {
    echo "Your PHP {$php_version} installation does not follow Drupal.org recommendations, please fix following problems:" . PHP_EOL;
    foreach($readiness['errors'] as $error) {
        echo "  >> {$error}" . PHP_EOL;
    }
}

TODO:

• Add PHP version check
• Refine for Drupal-version specific checks (e.g. D6 does not run correctly above PHP 5.6, but potentially requires ereg extension)
• Support wider database engine checks
• ImageMagick?
• Support XDebug if installed
• Check APC if applicable
• Support error_reporting leveling (for prod and dev)
• Support ini checks false-off-0