PHP is associated with LDAP login (Win 2008 R2 Server Domain Controller)

code is as follows

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$ds =LDAP_ Connect ("172.16.80.233", "389"); Must be a valid LDAP server!   $username = ' Administrator@zb.com ';   $username = ' 123456 ';   if ($ds) {   if ($bind = Ldap_bind ($ds, $username, $password))   {  //Login Success   Session_Start ();   Header ("Location:index.php");//Jump to index.php page   ldap_close ($ds);  } &nbs 　　　　P Else   {   echo "Login failed";   echo "<script type= ' text/javascript ' >alert (' Account or password error 　　　　');</script> "; Ldap_close ($DS);  }  }   Else   {   echo cannot connect to domain;  }