note 59262 added to function.count

You can find an average from an array using this and array_sum. <?php //array average( array input ) function average($input) { return array_sum($input) / count($input); } ?> You can also do a method of form validation that involves putting all errors into an array and letting count() do the key part. <?php if(isset($_POST['submit'])) { $errors = array(); if(empty($_POST['message'])) $errors[] = "Empty message field"; if(!preg_match('/[a-z0-9.]@[a-z0-9].[a-z]/i', $_POST['email']) { $errors[] = "Bad email address"; } if(count($errors) == 0) { //process form... } } ?> ---- Manual Page -- http://www.php.net/manual/en/function.count.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59262 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59262&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59262&report=yes Search -- http://master.php.net/manage/user-notes.php