如何使用jQuery“捕获”具有不同表单ID的多个表单？

$(\"form\").submit(function() {
});

$(\"#form1,#form2,#form3\").submit(function() {
});

<form id=\"form1\" class=\"formClass\"></form>
<form id=\"form2\" class=\"formClass\"></form>
<form id=\"form3\" class=\"formClass\"></form>
<form id=\"form4\" class=\"formClass\"></form>


$(\".formClass\").submit();

<?php
var_dump($_POST);

error_log(var_export($_POST, true));

[error] [client 192.168.9.1] array (\\n  \'field1\' => \'1\',\\n), referer: http://fiddle.jshell.net/_display/