PHP Requirements Checker

A PHP library to check the current environment against a set of defined requirements. Currently it supports checking for PHP version, OS, extensions, php.ini values, functions, classes, apache modules and local files and folders.

Install via composer

composer require mirazmac/php-requirements-checker

Manual Install

Download the latest release. Extract and require src/Checker.php in your code. But it's highly recommended to use Composer.

require 'src/Checker.php';

Usage

use MirazMac\Requirements\Checker;

$checker = new Checker;

// Define requirements
$checker->requirePhpVersion('>=5.6')
        ->requirePhpExtensions(['ffmpeg', 'mbstring'])
        ->requireFunctions(['random_bytes'])
        ->requireFile('../composer.json', Checker::CHECK_FILE_EXISTS)
        ->requireDirectory('../src', Checker::CHECK_IS_READABLE)
        ->requireIniValues([
            'allow_url_fopen' => true,
            'short_open_tag' => true,
            'memory_limit'  => '>=64M',
        ]);

// Runs the check and returns parsed requirements as an array
// Contains parsed requirements with state of the current values
// and their comparison result
$output = $checker->check();

// Should be called after running check() to see if requirements has met or not
$satisfied = $checker->isSatisfied();

if ($satisfied) {
    echo "Requirements are met.";
} else {
    echo join(', ', $checker->getErrors());
}

Supported Requirement Checks

Every supported requirements check begins with the word require. They return the class instance that means they're chain-able. These are the supported checks:

requirePhpVersion(string $version);

You can check if current PHP version matches your desired version using this method. The parameter $version should be a string containing your desired PHP version. Comparison operators can be prepended at the very beginning of the string.

$checker->requirePhpVersion('7.0.0');

// Note the comparison operator
// Supports comparison operators: <, >, =, >=
$checker->requirePhpVersion('>=7.0.0');

requireOS(string $os);

You can check if current OS matches with your desired operating system. The parameter $os must have one of the following values: Checker::OS_UNIX, Checker::OS_DOS

$checker->requireOS(Checker::OS_UNIX);

requireIniValues(array $values)

Use this to validate a set of php.ini config values to compare against your provided values. The parameter $values should be an array as key => value fashion, where the key would contain the php.ini config var and the value should be the desired value. Like requirePhpVersion(); comparison operators can be prepended at the very beginning of the value. To keep things simple and neat, use boolean instead of using On/1/Off/0 for the check.

$checker->requireIniValues([
    // Will check if file_uploads is enabled or not
    // Notice the usage of boolean instead of On/Off/1/0
    'file_uploads' => true,

    // Note the comparison operator > before the desired value
    // This means the library will check if post_max_size is greater than 2M or not
    'post_max_size' => '>2M',

    // Set a value to `NULL` to just skip the check for that value
    // Useful when you don't wanna compare but want to fetch the
    // current value on the parsed requirements array
    'safe_mode'   => null,
]);

requirePhpExtensions(array $extensions)

To make sure provided extensions are loaded. Parameter $extenstions should be an array with the extension names.

$checker->requirePhpExtensions([
    'openssl', 'mbstring', 'curl'
]);

requireFunctions(array $functions)

To make sure provided functions are loaded. Parameter $functions should be an array with the function names.

$checker->requireFunctions([
    'apcu_fetch', 'mb_substr', 'curl_init'
]);

requireClasses(array $classes)

To make sure provided classes are loaded. Parameter $classes should be an array with the class names (namespaced or global namespace will be used).

$checker->requireClasses([
    'PDO', 'finfo', 'stdClass'
]);

requireApacheModules(array $modules)

To make sure provided modules are loaded. Parameter $modules should be an array with the module names. NOTE: This check will only run if current server is Apache.

$checker->requireApacheModules([
    'mod_rewrite', 'mod_mime'
]);

requireFile(string $path, string $check = self::CHECK_FILE_EXISTS)

To check permissions and existence of certain files and directories. The parameter $path should be path to any file or directory. The parameter $check is the check name that would be performed on the path. The supported values are:

• Checker::CHECK_IS_FILE - Runs is_file() on the path.

• Checker::CHECK_IS_DIR Runs is_dir() on the path.

• Checker::CHECK_IS_READABLE Runs is_readable() on the path.

• Checker::CHECK_IS_WRITABLE Runs is_writable() on the path.

• Checker::CHECK_FILE_EXISTS Runs file_exists() on the path.

NOTE: requireDirectory() is an alias of this method.

$checker->requireFile('app/config.ini', Checker::CHECK_IS_FILE)
        ->requireFile('app/cache', Checker::CHECK_IS_WRITABLE);
        ->requireDirectory('app/cache', Checker::CHECK_IS_DIR);

Todos

• Write tests
• Write extended docs