(PHP 4, PHP 5)
ldap_bind — Bind to LDAP directory
$link_identifier
   [, string $bind_rdn = NULL
   [, string $bind_password = NULL
  ]] )Binds to the LDAP directory with specified RDN and password.
link_identifierAn LDAP link identifier, returned by ldap_connect().
bind_rdn
bind_password
   If bind_rdn and bind_password
   are not specified, an anonymous bind is attempted.
  
   Returns TRUE on success or FALSE on failure.
  
Example #1 Using LDAP Bind
<?php
// using ldap bind
$ldaprdn  = 'uname';     // ldap rdn or dn
$ldappass = 'password';  // associated password
// connect to ldap server
$ldapconn = ldap_connect("ldap.example.com")
    or die("Could not connect to LDAP server.");
if ($ldapconn) {
    // binding to ldap server
    $ldapbind = ldap_bind($ldapconn, $ldaprdn, $ldappass);
    // verify binding
    if ($ldapbind) {
        echo "LDAP bind successful...";
    } else {
        echo "LDAP bind failed...";
    }
}
?>
Example #2 Using LDAP Bind Anonymously
<?php
//using ldap bind anonymously
// connect to ldap server
$ldapconn = ldap_connect("ldap.example.com")
    or die("Could not connect to LDAP server.");
if ($ldapconn) {
    // binding anonymously
    $ldapbind = ldap_bind($ldapconn);
    if ($ldapbind) {
        echo "LDAP bind anonymous successful...";
    } else {
        echo "LDAP bind anonymous failed...";
    }
}
?>