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(PHP 4, PHP 5)

ldap_connectConnect to an LDAP server


resource ldap_connect ([ string $hostname = NULL [, int $port = 389 ]] )

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.


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.


版本 说明
4.0.4 URL and SSL support was added.


Example #1 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 #2 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}");



  • ldap_8859_to_t61
  • ldap_add
  • ldap_bind
  • ldap_close
  • ldap_compare
  • ldap_connect
  • ldap_count_entries
  • ldap_delete
  • ldap_dn2ufn
  • ldap_err2str
  • ldap_errno
  • ldap_error
  • ldap_explode_dn
  • ldap_first_attribute
  • ldap_first_entry
  • ldap_first_reference
  • ldap_free_result
  • ldap_get_attributes
  • ldap_get_dn
  • ldap_get_entries
  • ldap_get_option
  • ldap_get_values
  • ldap_get_values_len
  • ldap_list
  • ldap_modify
  • ldap_mod_add
  • ldap_mod_del
  • ldap_mod_replace
  • ldap_next_attribute
  • ldap_next_entry
  • ldap_next_reference
  • ldap_parse_reference
  • ldap_parse_result
  • ldap_read
  • ldap_rename
  • ldap_sasl_bind
  • ldap_search
  • ldap_set_option
  • ldap_set_rebind_proc
  • ldap_sort
  • ldap_start_tls
  • ldap_t61_to_8859
  • ldap_unbind
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