#30 - add e-mail syntax check

Author: technicalguru

src/TgUtils/Utils.php

@@ -121,6 +121,15 @@ public static function isEmpty($s) {
 		return strlen(trim($s)) == 0;
 	}
 
+	/**
+	 * Tests whether string is a valid email syntax.
+	 * @param string $s - string to be tested
+	 * @return boolean TRUE when string is an email.
+	 */
+	public static function isEmail($s) {
+		return filter_var($s, FILTER_VALIDATE_EMAIL);
+	}
+
 	/**
 	 * Checks whether an array is associative or not.
 	 * @param array $arr - the array to be tested