Question

我收到这种错误信息，知道第9行的代码有什么问题吗？基本上，代码是从表单中搜索用户输入，然后从ldap中搜索用户名。

PHP注意：未定义的索引：第9行的C：\ inetpub \ wwwroot \ LDAP \ New3 \ search2.php中的用户名

<?php
$ds = @ldap_connect("ldap.xxxxx.my");

if (!$ds) {
    die("Unable to connect to test server.");
}

$res = @ldap_bind($ds);         # Anonymous bind
$userid = $_POST['username']; // User key their userid or email

$srch = @ldap_search($ds,
    "o=company, o=CompanyNet",
    "uid=$userid",          # Search on username

    array('uid'), # We want username
    0,              # We want values and types (see docs)
    10              # We want, at most, 10 results

);


if (ldap_errno($ds) == 4) {     # Error code for "too many results"
    print "<B>More than 10 results were returned.  Only 10 displayed.</B><BR>\n";
}

if ($srch) {
    $results = @ldap_get_entries($ds, $srch);    # Retrieve all results
    for ($i = 0; $i < $results["count"]; $i++) { # Iterate over all results
        print "<B>".$results[$i]["uid"][0]."</B> exist in directory "."<BR>\n";
    }
}
else {
    print "<B>Directory lookup failed: ".ldap_error($ds)."</B><BR>\n";
}

@ldap_close($ds);           # Close off my connection
?>

<html>
<head>
</head>
<body>
<form action="search.php" method="POST">
<input type="text" name="username" length="30">
<input type="submit" name="submit" value = "Search">
</form>
</body>
</html>

Answer 1

您收到错误是因为您希望在加载页面时设置$_POST数组。

事实并非如此。它只会在提交表单时设置，因此您可以通过添加此if条件来处理：

if(isset($_POST['submit'])) {
    $ds = @ldap_connect("ldap.xxxxx.my");

    if (!$ds) {
       die("Unable to connect to test server.");
    }

    $res = @ldap_bind($ds);         # Anonymous bind
    $userid = (!empty($_POST['username'])) ? $_POST['username'] : ''; // User key their userid or email

    // ... the rest of your code
}

正如弗雷德在评论中所说，你可能希望通过使用php的内置函数来确保username不为空 - empty()

PHP注意：未定义索引：用户名

1 个答案: