LDAP Authentication Using PHP

Authentication through LDAP in PHP should be easier after reading my post. Isn’t it?

Simply you will have to follow below steps:

1 : Enable LDAP extension over Apache.

2: create a Login Page and connect through LDAP on login form and search using user-provided settings.

Below snippet will help you to achieve your objective:

 * Created by Anoop Sharma of anoopkumarsharma.com
if(isset($_POST['username']) && isset($_POST['password'])){

    $adServer = "ldap://Host.com";

    $ldap = ldap_connect($adServer);
    $username = $_POST['username'];
    $password = $_POST['password'];

    $ldaprdn = 'Host' . "\\" . $username;

    ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
    ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);

    $bind = @ldap_bind($ldap, $ldaprdn, $password);

    if ($bind) {
        $result = ldap_search($ldap,"dc=Host,dc=Host",$filter);  //LDAP DC Info
        $info = ldap_get_entries($ldap, $result);
        for ($i=0; $i<$info["count"]; $i++)
            if($info['count'] > 1)
            echo "<p>You are accessing <strong> ". $info[$i]["sn"][0] .", " . $info[$i]["givenname"][0] ."</strong><br /> (" . $info[$i]["samaccountname"][0] .")</p>\n";
            echo '<pre>';
            echo '</pre>';
            $userDn = $info[$i]["distinguishedname"][0];
    } else {
        $msg = "Invalid email address / password";
        echo $msg;

    <form action="#" method="POST">
        <label for="username">Username: </label><input id="username" type="text" name="username" />
        <label for="password">Password: </label><input id="password" type="password" name="password" />        <input type="submit" name="submit" value="Submit" />
<?php } ?>

Looking forward for your queries and feedback 🙂

Happy Coding!

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