chdir
(PHP 4, PHP 5, PHP 7, PHP 8)
chdir — 改變目錄
說明
chdir(string
$directory): bool
將 PHP 的當前目錄改為
directory。
參數
-
directory -
新的當前目錄
返回值
成功時返回 true， 或者在失敗時返回 false。
錯誤／異常
Throws an error of level E_WARNING on failure.
範例
示例 #1 chdir() 例子
<?php
// current directory
echo getcwd() . "\n";
chdir('public_html');
// current directory
echo getcwd() . "\n";
?>
以上例程的輸出類似於：
/home/vincent /home/vincent/public_html
註釋
警告
If the PHP interpreter has been built with ZTS (Zend Thread Safety) enabled,
any changes to the current directory made through chdir()
will be invisible to the operating system. All built-in PHP functions will
still respect the change in current directory; but external library
functions called using FFI will not. You
can tell whether your copy of PHP was built with ZTS enabled using
php -i or the built-in constant
PHP_ZTS.