PHP Script to password validation

<h3>PHP Script to password validation, accept only fix format such as alpha numeric</h3>

Here we are writing php code of accepting password and checking password is in formatted form or not, you can also called applying validation on password using php.

PHP code for password validation
<?php
error_reporting(0);
if(isset($_REQUEST['submit']))
{
$pwd=$_REQUEST['pwd'];
$rpwd=$_REQUEST['rpwd'];
$pwd=trim($pwd);
$flag="1";
if($flag=="1")
{
if($pwd=="")
{
$pwd_err="Please enter the Password";
$flag="0";
}
else if(strlen( $pwd) < 8)
{
$pwd_err="Password must be 8 character and above!";
$flag="0";
}
else if(!preg_match( '/[^&%$#A-Za-z0-9]+/', $pwd))
{
$pwd_err="Password must be alpha numeric!";
$flag="0";
}
}
if($flag=="1")
{
if($rpwd=="")
{
$rpwd_err="Please re-enter the Password";
$flag="0";
}
}
if($flag=="1")
{
if($pwd!=$rpwd)
{
$rpwd_err="Password not matched!";
$flag="0";
}
}

}

if(isset($_REQUEST["reset"]))
{
$pwd="";
$rpwd="";
}

?>
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
<form method="post" name="form" enctype="multipart/form-data" style="/* [disabled]margin-left:500px; */ margin-top: 10px;">

password:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<input type="password" name="pwd"
value="
<?php if(strlen( $pwd) < 8){echo "";} else if(!preg_match( '/[^&%$#A-Za-z0-9]+/', $pwd)) {echo "";} else{echo $pwd;} ?/>" />
< ?php echo $pwd_err;?><br /><br />

Re-enter password:&nbsp;
<input type="password" name="rpwd" value="<?php if($rpwd==$pwd){echo $rpwd;} else{echo "";} ?/>" />< ?php echo $rpwd_err;?><br /><br />

</form>
</body>
</html>

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