silverstripe-environmentcheck/_config.php

<?php

// // These power dev/health, which can be used by load balancers and other such systems
// EnvironmentCheckSuite::register('health', 'DatabaseCheck');

// // These power dev/check, which is used for diagnostics and for deployment
// EnvironmentCheckSuite::register('check', 'DatabaseCheck("Member")', "Is the database accessible?");
// EnvironmentCheckSuite::register('check', 'URLCheck("")', "Is the homepage accessible?");

// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("curl_init")', "Does PHP have CURL support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("imagecreatetruecolor")', "Does PHP have GD2 support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("xml_set_object")', "Does PHP have XML support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("token_get_all")', "Does PHP have tokenizer support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("iconv")', "Does PHP have iconv support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("hash")', "Does PHP have hash support?");
// EnvironmentCheckSuite::register('check', 'HasFunctionCheck("session_start")', "Does PHP have session support?");
// EnvironmentCheckSuite::register('check', 'HasClassCheck("DOMDocument")', "Does PHP have DOMDocument support?");

// EnvironmentCheckSuite::register('check', 'FileWriteableCheck("assets")', "Is assets/ writeable?");
// EnvironmentCheckSuite::register('check', 'FileWriteableCheck("' . TEMP_FOLDER . '")', "Is the temp folder writeable?");

// Ensure compatibility with PHP 7.2 ("object" is a reserved word),
// with SilverStripe 3.6 (using Object) and SilverStripe 3.7 (using SS_Object)
if (!class_exists('SS_Object')) {
    class_alias('Object', 'SS_Object');
}