form表单提交数据,'0X'变为'Ox'(已解决)

<form id="infoform" name="myform" method="post" target="supportiframe" action="" autocomplete="off" enctype="multipart/form-data" class="layui-form">
    <input type="text" size="45" id="credit_code" name="credit_code" value="91410100MA45RH790X" lay-verify="required" class="layui-input"/>
</form>

var_dump($_POST);
//结果:91410100MA45RH79Ox

请教各位解决思路