如果我运行命令行我得到预期的结果在下面的PHP代码：更新：Apache的扼流圈上的PHP ldap_connect（）调用

php -r 'var_dump(ldap_connect("ldaps://ldaps.example.com", 636));' 
resource(4) of type (ldap link)

但是如果我把这个PHP脚本

<?php ldap_connect("ldaps://ldaps.example.com", 636); ?>

阿帕奇断开连接，例如这是卷曲的回报，如果我打的脚本命令行：

curl http://example.com/ldap_test.php 
curl: (52) Empty reply from server

Apache access_log永远不会显示该页面的命中，并且error_log为空。

我知道LDAP服务器正在工作，因为我已经在另外两台服务器上测试过了。我正在开发一个运行PHP 5.2.9和Apache的Joyent加速器。任何人都知道为什么Apache会因此而窒息？

更新：

今天我在运行问题脚本时使用GDB调试Apache。当脚本命中ldap_connect（）行我得到了GDB如下：

Program received signal SIGSEGV, Segmentation fault. 
0xfe94b8bb in _free_unlocked() from /lib/libc.so.1

我不知道是什么原因造成的段错误还，但至少我知道，Apache的实际崩溃。

以下是完整的回溯：

Breakpoint 1, 0x08094417 in ap_process_request() 
(gdb) c 
Continuing. 

Program received signal SIGSEGV, Segmentation fault. 
0xfe94b8bb in _free_unlocked() from /lib/libc.so.1 
(gdb) where 
#0 0xfe94b8bb in _free_unlocked() from /lib/libc.so.1 
#1 0xfe94b86f in free() from /lib/libc.so.1 
#2 0xfde2d7e8 in ldap_x_free() from /usr/lib/libldap.so.5 
#3 0xfde3f78b in ldap_free_urldesc() from /usr/lib/libldap.so.5 
#4 0xfd0943d9 in ldap_free_urllist() from /opt/local/lib/libldap-2.4.so.2 
#5 0xfd087191 in ldap_ld_free() from /opt/local/lib/libldap-2.4.so.2 
#6 0xfd07ce8f in ldap_initialize() from /opt/local/lib/libldap-2.4.so.2 
#7 0xfd3831a1 in zif_ldap_connect() from /opt/local/lib/php/20040412/ldap.so 
#8 0xfcbda874 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#9 0xfcbe1a23 in ZEND_DO_FCALL_SPEC_CONST_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#10 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#11 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#12 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#13 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#14 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#15 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#16 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
---Type <return> to continue, or q <return> to quit--- 
#17 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#18 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#19 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#20 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#21 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#22 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#23 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#24 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#25 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#26 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#27 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#28 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#29 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#30 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
---Type <return> to continue, or q <return> to quit--- 
    from /opt/local/lib/httpd/mod_php5.so 
#31 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#32 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#33 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#34 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#35 0xfcbda985 in zend_do_fcall_common_helper_SPEC() 
    from /opt/local/lib/httpd/mod_php5.so 
#36 0xfcbdad65 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER() 
    from /opt/local/lib/httpd/mod_php5.so 
#37 0xfcbd9e99 in execute() from /opt/local/lib/httpd/mod_php5.so 
#38 0xfcbbebaa in zend_execute_scripts() from /opt/local/lib/httpd/mod_php5.so 
#39 0xfcb7f40e in php_execute_script() from /opt/local/lib/httpd/mod_php5.so 
#40 0xfcc509ca in php_handler() from /opt/local/lib/httpd/mod_php5.so 
#41 0x08085c2a in ap_run_handler() 
#42 0x0808638e in ap_invoke_handler() 
#43 0x08094ca7 in ap_internal_redirect() 
#44 0xfe48c232 in handler_redirect() from /opt/local/lib/httpd/mod_rewrite.so 
#45 0x08085c2a in ap_run_handler() 
#46 0x0808638e in ap_invoke_handler() 
#47 0x08094471 in ap_process_request() 
#48 0x0809177c in ap_process_http_connection() 
---Type <return> to continue, or q <return> to quit--- 
#49 0x0808d426 in ap_run_process_connection() 
#50 0x0808d858 in ap_process_connection() 
#51 0x08099e89 in child_main() 
#52 0x08099f65 in make_child() 
#53 0x0809a472 in ap_mpm_run() 
#54 0x080709ab in main() 
(gdb)

更新2：

从我可以告诉这两个函数的问题开始呼吁：

#3 0xfde3f78b in ldap_free_urldesc() from /usr/lib/libldap.so.5 
#4 0xfd0943d9 in ldap_free_urllist() from /opt/local/lib/libldap-2.4.so.2

＃4中的作用（ldap_free_urllist）是从/opt/local/lib/libldap-2.4.so.2中的库调用的，＃3是从/usr/lib/libldap.so.5中的库调用的。我不知道是否是正常的，但我会认为它不正常。所以不知怎么，这些LDAP库都被加载了。

来源

2010-09-27 macinjosh

我得到以下错误：不能联系LDAP服务器，当我不使用ldaps：// – macinjosh 2010-09-27 04:50:35

我相信ldap_connect（）只是返回一个资源，而不建立连接，直到你调用下一个函数（例如ldap_bind），你打电话给什么更多的ldap_x函数？编辑：对不起，删除我的评论以上:) – Scuzzy 2010-09-27 04:51:03

我不会在我的测试脚本中调用其他任何东西。我从字面上只调用ldap_connect（）。这只是我在问题中的代码行。 – macinjosh 2010-09-27 04:52:04

我看到你通过升级包修正了自己的问题，但如果你需要进一步调试发生了什么事情，您可以启用前的ldap_connect()像这样调试输出：

ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);

这应该填写的error.log与库调用

来源

2011-06-06 09:50:01

更新：Apache的扼流圈上的PHP ldap_connect（）调用

更新：

更新2：

回答

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