PHP 脚本中的 PHP LDAP 调试输出

我想在PHP脚本（Windows环境）中获取ldap连接的调试信息。要激活调试输出，您必须使用ldap_set_option调用ldap_connect：

ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);

并且有必要运行 from 命令行。否则，您将无法获得调试输出。在请求中，不显示此调试输出。

<?php
// Set the ldap server
$ldapurl = "foo.bar";
// Set debugging
ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
// connect to ldap server
$ldapconn = ldap_connect($ldapurl) or die ("Couldn't connect"); 
// binding to ldap server
$ldapbind = ldap_bind($ldapconn, $ldapuser, $ldappass);
?>

命令行的结果：

C:'>C:'Apache'php'php-cgi.exe -f C:'Apache'htdocs'ldap_debug.php
    ldap_url_parse_ext(ldap://localhost/)
    ldap_init: trying c:'openldap'sysconf'ldap.conf
    ldap_init: HOME env is NULL
    ldap_init: trying ldaprc
    ldap_init: LDAPCONF env is NULL
    ldap_init: LDAPRC env is NULL
    ldap_create
    ldap_bind_s
    ldap_simple_bind_s
    ldap_sasl_bind_s
    ldap_sasl_bind
    ldap_send_initial_request
    ldap_new_connection 1 1 0
    ldap_int_open_connection
    ldap_connect_to_host: TCP foo.bar:389
    ldap_new_socket: 776
    ldap_prepare_socket: 776
    ldap_connect_to_host: Trying 192.168.42.20:389
    ldap_pvt_connect: fd: 776 tm: -1 async: 0
    ldap_open_defconn: successful
    ldap_send_server_request
    ldap_result ld 091BAC10 msgid 1
    wait4msg ld 091BAC10 msgid 1 (infinite timeout)
    wait4msg continue ld 091BAC10 msgid 1 all 1
    ** ld 091BAC10 Connections:
    * host: foo.bar  port: 389  (default)
      refcnt: 2  status: Connected
      last used: Mon Dec 15 09:16:49 2014

    ** ld 091BAC10 Outstanding Requests:
     * msgid 1,  origid 1, status InProgress
       outstanding referrals 0, parent count 0
      ld 091BAC10 request count 1 (abandoned 0)
    ** ld 091BAC10 Response Queue:
       Empty
      ld 091BAC10 response count 0
    ldap_chkResponseList ld 091BAC10 msgid 1 all 1
    ldap_chkResponseList returns ld 091BAC10 NULL
    ldap_int_select
    read1msg: ld 091BAC10 msgid 1 all 1
    read1msg: ld 091BAC10 msgid 1 message type bind
    read1msg: ld 091BAC10 0 new referrals
    read1msg:  mark request completed, ld 091BAC10 msgid 1
    request done: ld 091BAC10 msgid 1
    res_errno: 0, res_error: <>, res_matched: <>
    ldap_free_request (origid 1, msgid 1)
    ldap_parse_result
    ldap_msgfree
    ldap_free_connection 1 1
    ldap_send_unbind
    ldap_free_connection: actually freed

现在我想在请求中执行此操作（http://localhost/ldap_debug.php?cmd）：

<?php
if (isset($_REQUEST['cmd']))
{
    $aOutput = array();
    $sCmdLine = "C:''Apache''php''php-cgi.exe -f ".__FILE__;
    exec($sCmdLine, $aOutput);
    print_r($aOutput);
    exit;
}
// Set the ldap server
$ldapurl = "foo.bar";
// Set debugging
ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
// connect to ldap server
$ldapconn = ldap_connect($ldapurl) or die ("Couldn't connect"); 
// binding to ldap server
$ldapbind = ldap_bind($ldapconn, $ldapuser, $ldappass);
?>

但是结果数组$aOutput为空。有什么提示吗？