php validation help to match email and password

[ms115]

<?php

if (isset($_POST['submit'])){
    $error = array()


if (empty($_POST['mail'])) {
        $error[] = 'Please Enter your Email and also confirm your mail';
    } else {


        if (preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/", $_POST['mail'])) {
            $Email = $_POST['mail'];
        } else {
             $error[] = 'Your Email Address is Invalid  ';
        }

    }

if (empty($_POST['pass'])) {
        $error[] = 'Please Enter your password';
    } else {

        if (preg_match("/^[- a-z0-9,<>@()&\%$#!~`]{5,9}$/i", $_POST['pass'])) {
      
            $Password1 = $_POST['pass'];
        } else {
             $error[] = 'Your password must be between 5 and 9 characters';
       
		} else {

			if ($Password1!=$conpass trim($_POST['conpass']){
		
		$error[] = 'Your passwords do not match';

    }

	}

?>

<form action= "" >
<table>
<tr>
    <td width="117">Password</td>
    <td width="237"><input type="password" name="pass" size="18">*</td>
    <td width="120">Confirm Password</td>``
    <td width="241">
	<input type="password" name="conpass" size="18"></td>
    <td width="25">&nbsp;</td>
    <td width="38">&nbsp;</td>
  </tr>
</table>
</form>