depcheck.php

<?php
/**
 * Testing for all dependencies StartupAPI has
 * http://startupapi.org/Startup_API/Installation#Prerequisites
 */
$required_php_version = '5.3.0';
$required_extensions = array('mysqli', 'mcrypt', 'curl', 'mbstring', 'json');

$current_php_version = phpversion();
if (version_compare($current_php_version, $required_php_version, '>=')) {
	echo "Using PHP version $current_php_version ... OK\n";
} else {
	echo("[Missing Dependency] You're using PHP version lower then required $required_php_version");
	exit(1);
}

$current_php_extensions = get_loaded_extensions();

foreach ($required_extensions as $extension) {
	if (in_array($extension, $current_php_extensions)) {
		echo "PHP $extension extension is loaded ... OK\n";
	} else {
		echo("[Missing Dependency] You're using PHP installation which does not have '$extension' extension enabled\n");
		exit(1);
	}
}