PhabricatorExtensionsSetupCheck.php
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	<?php

	final class PhabricatorExtensionsSetupCheck extends PhabricatorSetupCheck {

	public function getDefaultGroup() {
	return self::GROUP_PHP;
	}

	public function getExecutionOrder() {
	return 0;
	}

	protected function executeChecks() {
	// TODO: Make 'mbstring' and 'iconv' soft requirements.
	// TODO: Make 'curl' a soft requirement.

	$required = array(
	'hash',
	'json',
	'openssl',
	'mbstring',
	'iconv',
	'ctype',

	// There is a chance we might not need this, but some configurations (like
	// OAuth or Amazon SES) will require it. Just mark it 'required' since
	// it's widely available and relatively core.
	'curl',
	);

	$need = array();
	foreach ($required as $extension) {
	if (!extension_loaded($extension)) {
	$need[] = $extension;
	}
	}

	if (!extension_loaded('mysqli') && !extension_loaded('mysql')) {
	$need[] = 'mysqli or mysql';
	}

	if (!$need) {
	return;
	}

	$message = pht('Required PHP extensions are not installed.');

	$issue = $this->newIssue('php.extensions')
	->setIsFatal(true)
	->setName(pht('Missing Required Extensions'))
	->setMessage($message);

	foreach ($need as $extension) {
	$issue->addPHPExtension($extension);
	}
	}
	}