Return first attribute

# ldap_first_attribute

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

ldap_first_attribute — Return first attribute

### 说明

function ldap_first_attribute(LDAP\Connection `$ldap`, LDAP\ResultEntry `$entry`): string|false

Gets the first attribute in the given entry. Remaining attributes are retrieved by calling ldap_next_attribute() successively.

Similar to reading entries, attributes are also read one by one from a particular entry.

### 参数

`ldap`

  通过 ldap_connect() 返回的 LDAP\Connection 实例。

`entry`

  LDAP\ResultEntry 实例。

### 返回值

Returns the first attribute in the entry on success and `false` on error.

### 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。
8.1.0 | The `entry` parameter expects an LDAP\ResultEntry instance now; previously, a valid `ldap result entry` resource was expected.
8.0.0 | The unused third parameter `ber_identifier` is no longer accepted.

### 参见

- ldap_next_attribute() - Get the next attribute in result
- ldap_get_attributes() - Get attributes from a search result entry

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