(PHP 4, PHP 5, PHP 7)
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.
Example #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
Note: 当启用 安全模式时， PHP 会在执行脚本时检查被脚本操作的目录是否与被执行的脚本有相同的 UID（所有者）。
When changing dir's under windows environments:
<?php
$path="c:\temp"';
chdir($path);
/* getcwd() gives you back "c:\temp" */
$path="c:\temp\"';
chdir($path);
/* getcwd() gives you back "c:\temp\" */
?>
to work around this inconsistency
doing a chdir('.') after the chdir always gives back "c:\temp"
When using PHP safe mode and trying to change to a dir that is not accessible due to the safe mode restrictions, the function simply fails without generating any kind of error message.
(Tested in PHP 4.3.10-16, Debian Sarge default)