cleanup quotes

zimbraAddressAvailable.php

@@ -19,12 +19,12 @@ if($pos===false) {
  * Requires this PHP api to make soap calls and parse responses
  */
 require_once(__DIR__ . '/../../../init.php');
-require_once("api/Zm/Auth.php");
-require_once("api/Zm/Account.php");
+require_once('api/Zm/Auth.php');
+require_once('api/Zm/Account.php');
 use WHMCS\Database\Capsule;
 
 $whmcs = App::self();
-$accountName = $_GET['name'] . "@" .  $_GET['domain'];
+$accountName = $_GET['name'] . '@' .  $_GET['domain'];
 $productID = $_GET['pid'];
 $accessData = array('zimbraServer' => '', 'adminUser' => '', 'adminPass' => '');
 $serverGroupIDObj = Capsule::table('tblproducts')
@@ -49,14 +49,14 @@ $adminPassDecrypt = localAPI('DecryptPassword', array('password2' => $adminPassC
 if ($adminPassDecrypt['result'] == 'success') {
 	$accessData['adminPass'] = $adminPassDecrypt['password'];
 }
-$api = new Zm_Auth($accessData['zimbraServer'], $accessData['adminUser'], $accessData['adminPass'], "admin");
+$api = new Zm_Auth($accessData['zimbraServer'], $accessData['adminUser'], $accessData['adminPass'], 'admin');
 $login = $api->login();
-if(is_a($login, "Exception")) {
+if(is_a($login, 'Exception')) {
 	logModuleCall(
 		'zimbrasingle',
 		__FUNCTION__,
 		$accessData,
-		"Error: cannot login to " . $accessData['zimbraServer'],
+		'Error: cannot login to ' . $accessData['zimbraServer'],
 		$login->getMessage()
 	);
 	exit();