php validation for password in php - php

Question

Php validation in php for passord:
How to create retype password validation:
help me friends for retype pass validation in php:
$errorMsg = "";
if((!$email) || (!$password)){
$errorMsg = "You did not submit the following required information!<br /><br />";
if(!$email){
$errorMsg .= "--- Email Address";
}
else if(!$password){
$errorMsg .= "--- Password";
}
}
else {
echo"send to email activation";}
This is my form for registration
<tr>
<td><div align="right">Email: </div></td>
<td><input name="email" type="text" value="<?php echo "$email"; ?>" /></td>
</tr>
<tr>
<td><div align="right"> Password: </div></td>
<td><input name="password1" type="password" value="<?php echo "$password"; ?>" />
<font size="-2" color="#006600">(letters or numbers only, no spaces no symbols)</font></td>
</tr>
<tr>
<td><div align="right"> Retype Password: </div></td>
<td><input name="password" type="password" value="<?php echo "$password"; ?>" />
</tr>
<tr>
<td><div align="right"></div></td>
<td><input type="submit" name="Submit" value="Submit Form" /></td>
</tr>

Answer 1

you can check if $password and $password are same
if($_POST['password '] == $_POST['password1']) echo ' Password Matches';

Answer 2

Try this
<?php
$errorMsg = "";
if((!$email) || (!$password)){
$errorMsg = "You did not submit the following required information!<br /><br />";
if(!$email){
$errorMsg .= "--- Email Address";
}
else if(!$password){
$errorMsg .= "--- Password";
}
}
else {
if($_POST['password1']!=$_POST['password']){
$errorMsg .= "Passwords mismatches";
}
else{
echo"send to email activation";
}
}
?>

Answer 3

If you check only the equalness of two passwords, the empty == empty will true, so lets check them in one expression.
Suggestion
define min length of typed password e.g. 5
use isset because in $_POST the variable with 'password' or 'password1' key might be missing, and you'll receive notice message.
now check
...
if(isset($_POST['password']) && isset($_POST['password1']) && strlen($_POST['password']) >=5 && $_POST['password'] === $_POST['password1']) {
// password validated
}
...
also use trim() function getting email, but not password, because whitespaces can be part of password.
so $email = trim($_POST['email']); // removing whitespaces from left and right