Description
bool 
ldap_bind ( resource link_identifier [, string bind_rdn [, string bind_password]] )
     Binds to the LDAP directory with specified RDN and
     password. 如果成功则返回 TRUE,失败则返回 FALSE。
  
     ldap_bind() does a bind operation on the
     directory. bind_rdn and
     bind_password are optional. If not
     specified, anonymous bind is attempted.
    
例子 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...";     }          }
  ?>
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例子 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...";     }   }      ?>
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