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Connect to an LDAP server (PHP 4, PHP 5)
resource ldap_connect ( [string hostname [, int port]] )

Establishes a connection to a LDAP server on a specified hostname and port.



If you are using OpenLDAP 2.x.x you can specify a URL instead of the hostname. To use LDAP with SSL, compile OpenLDAP 2.x.x with SSL support, configure PHP with SSL, and set this parameter as ldaps://hostname/.


The port to connect to. Not used when using URLs. Defaults to 389.

Return Values

Returns a positive LDAP link identifier on success, or FALSE on error. When OpenLDAP 2.x.x is used, ldap_connect() will always return a resource as it does not actually connect but just initializes the connecting parameters. The actual connect happens with the next calls to ldap_* funcs, usually with ldap_bind().

If no arguments are specified then the link identifier of the already opened link will be returned.


4.0.4 URL and SSL support was added.


Example 1114. Example of connecting to LDAP server.


// LDAP variables
$ldaphost = "";  // your ldap servers
$ldapport = 389;                 // your ldap server's port number

// Connecting to LDAP
$ldapconn = ldap_connect($ldaphost, $ldapport)
         or die(
"Could not connect to $ldaphost");


Example 1115. Example of connecting securely to LDAP server.


// make sure your host is the correct one
// that you issued your secure certificate to
$ldaphost = "ldaps://";

// Connecting to LDAP
$ldapconn = ldap_connect($ldaphost)
         or die(
"Could not connect to {$ldaphost}");


See Also