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(PHP 4, PHP 5, PHP 7, PHP 8)
chdir — 改变目录
$directory): bool
将 PHP 的当前目录改为
directory。
directory
新的当前目录
成功时返回 true， 或者在失败时返回 false。
Throws an error of level E_WARNING on failure.
示例 #1 chdir() 例子
<?php
// current directory
echo getcwd() . "\n";
chdir('public_html');
// current directory
echo getcwd() . "\n";
?>
以上例程的输出类似于：
/home/vincent /home/vincent/public_html
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.
