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$ldap[‘user’] = ‘uname’;<br>
$ldap[‘pass’] = ‘password’;<br>
$ldap[‘host’] = ‘ldap.example.com’;<br>
$ldap[‘port’] = 389;<br>
$ldap[‘dn’] = ‘cn’.$ldap[‘user’].’,ou=Department,o=Company Name’;<br>
$ldap[‘base’] = ‘’;<br>
<br>
// connecting to ldap<br>
$ldap[‘conn’] = ldap_connect( $ldap[‘host’], $ldap[‘port’] )<br>
or die( “Could not connect to server {$ldap[‘host’]} );<br>
<br>
// binding to ldap<br>
$ldap[‘bind’] = ldap_bind( $ldap[‘conn’], $ldap[‘dn’], $ldap[‘pass’] );<br>
<br>
if( !$ldap[‘bind’] )<br>
{<br>
echo ldap_error( $ldap[‘conn’] );<br>
exit;<br>
}<br>
<br>
?><br>
<br>
中,我向脚本中添加了ldap_error函数,如果绑定到LDAP服务器的用户身份没有得到确认,那么代码将退出运行。该函数返回一个字符串,该字符串包含了发送到LDAP服务器的最后一条指令产生的错误信息。如果你按给定用户名和口令的绑定没有成功登录,那么错误信息将包含这对无效的用户名和口令。<br>
<br>
在我们的最后一个例子中<br>
<br>
<?php<br>
// LDAP variables<br>
$ldap[‘user’] = ‘uname’;<br>
$ldap[‘pass’] = ‘password’;<br>
$ldap[‘host’] = ‘ldap.example.com’;<br>
$ldap[‘port’] = 389;<br>
$ldap[‘dn’] = ‘cn’.$ldap[‘user’].’,ou=Department,o=Company Name’;<br>
$ldap[‘base’] = ‘’;<br>
<br>
// connecting to ldap<br>
$ldap[‘conn’] = ldap_connect( $ldap[‘host’], $ldap[‘port’] )<br>
or die( “Could not connect to server {$ldap[‘host’]} );<br>
<br>
// binding to ldap<br>
$ldap[‘bind’] = ldap_bind( $ldap[‘conn’], $ldap[‘dn’], $ldap[‘pass’] );<br>
<br>
if( !$ldap[‘bind’] )<br>
{<br>
echo ldap_error( $ldap[‘conn’] );<br>
exit;<br>
}<br>
<br>
// search for the user on the ldap server and return all<br>
// the user information<br>
$ldap[‘result’] = ldap_search( $ldap[‘conn’], $ldap[‘base’], ‘uid=’.$ldap[‘user’] );<br>
<br>
<br>
<br>
<br>
if( $ldap[‘result’] )<br>
{<br>
// retrieve all the entries from the search result<br>
$ldap[‘info’] = ldap_get_entries( $ldap[‘conn’], $ldap[‘result’] );<br>
}<br>
else<br>
{<br>
echo ldap_error( $ldap[‘conn’] );<br>
exit;<br>
<br>
}<br>
<br>
if( $ldap[‘info’] )<br>
{<br>
// Add the user’s department name and email address<br>
// to the session<br>
$_SESSION[‘userdept’] = $ldap[‘info’][0][‘department’][0];<br>
$_SESSION[‘usermail’] = $ldap[‘info’][0][‘mail’][0];<br>
}<br>
else<br>
{<br>
echo ldap_error( $ldap[‘conn’] );<br>
exit;<br>
}<br>
<br>
// close connection to ldap server<br>
$ldap_close( $ldap[‘conn’] );<br>
<br>
?><br>
<br>
我同时使用了上述函数清单中的最后列出的三个函数:: ldap_search、ldap_get_entries以及ldap_close.<br>
<br>
当代码清单D中调用过ldap_bind函数后,我通过调用ldap_search函数来搜索服务器以获得我需要的信息。ldap_search函数有多个参数,不过,我们这里只使用了前三个参数。我向搜索函数传递了ldap connection、search base和filter参数,这样该函数就会正确用户名下以及支持的搜索范围和过滤条件下对服务器进行搜索。简而言之,就是我指定uid来指示用户名说明搜索的用户。这样LDAP服务器就会过滤搜索结果,仅仅返回该用户自己的LDAP信息。<br>
<br>
学习过程<br>
当我第一次开始用PHP的LDAP扩展时候,我对ldap_search函数只返回资源而不是一个数组或者字符串而迷惑不解。当我学会用ldap_get_entries函数来获取搜索的实际结果时,我才明白过来。ldap_get_entries函数的一个优点就是它把搜索结果作为一个多维数组来返回。就是说,我把搜索结果存到一个名为$ldap[‘info’]的数组中,这看起来挺让人迷惑的。<br>
<br>
由于在多维数组中有我搜索的结果,我可以任意处理这些数据。我把用户的部门和电子邮件地址保存到session变量中,以便在本次session的稍后时候用上。<br>
<br>
当这些事情都做完之后,我用ldap_close函数关闭连接。关闭函数可以释放连接资源。该函数还有一个别名ldap_unbind,它们实际上是同一个函数。<br>
<br>
一个很好的出发点<br>
尽管我对LDAP扩展中的其它函数有很多接触,我列出的函数对你初学LDAP身份认证来说已经够用了。PHP和LDAP的联合为基于Web的应用程序提供了一种通用的验证用户身份的方法。LDAP服务器允许管理员对用户授权访问许可,它也可以允许或者拒绝应用程序对数据的访问。<br>
<br>
写得不好,欢迎大家讨论
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