# ldap_errno

(PHP 4, PHP 5, PHP 7, PHP 8)

ldap_errno — Return the LDAP error number of the last LDAP command

### 说明

ldap_errno(LDAP\Connection `$ldap`): int

Returns the standardized error number returned by the last LDAP command. This number can be converted into a textual error message using ldap_err2str().

### 参数

`ldap`

  通过 ldap_connect() 返回的 LDAP\Connection 实例。

### 返回值

Return the LDAP error number of the last LDAP command for this link.

### 更新日志

版本 | 说明
--- | ---
8.1.0 | 现在 `ldap` 参数接受 LDAP\Connection 实例，之前接受有效的 `ldap link` resource。

### 示例

Unless you lower your warning level in your php.ini sufficiently or prefix your LDAP commands with @ (at) characters to suppress warning output, the errors generated will also show up in your HTML output.

示例 #1 Generating and catching an error

`<?php
// This example contains an error, which we will catch.
$ld = ldap_connect("localhost");
$bind = ldap_bind($ld);
// syntax error in filter expression (errno 87),
// must be "objectclass=*" to work.
$res = @ldap_search($ld, "o=Myorg, c=DE", "objectclass");
if (!$res) {
echo "LDAP-Errno: " . ldap_errno($ld) . "<br />\n";
echo "LDAP-Error: " . ldap_error($ld) . "<br />\n";
die("Argh!<br />\n");
}
$info = ldap_get_entries($ld, $res);
echo $info["count"] . " matching entries.<br />\n";
?>`

### 参见

- ldap_err2str() - Convert LDAP error number into string error message
- ldap_error() - Return the LDAP error message of the last LDAP command

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