PHP – Password Hash & Password Verify with Example

In this tutorial, we are going to see how to authenticate a user using PDO and password_verify().

First, make sure your passwords are stored in the database using password_hash() function.

If you are a “newbie” you should know how to connect to a MySQL database before using the code below. You cannot authenticate a user if you are not logged in.

Suppose the user’s credentials come from a POST request, try the following code:
 
 

Example: Authenticate a user using PDO and password_verify()

<?php

$query = $pdo->prepare("SELECT * FROM users WHERE email = ?");
$query->execute([$_POST['email']]);
$user = $query->fetch();

if ($user && password_verify($_POST['pass'], $user['pass']))
{
    echo "Valid ID!";
} else {
    echo "Invalid ID!";
}
?>

• In the first line, we create a PDO prepared statement, from a query in which the data is replaced with a question mark (?).
• In the second line, we run the query.
• And the third line, we get a row from a table.
• The next line, we check both if our query returned data, if it did! We check the password.

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