Remember to use if(fileowner(...) === FALSE) instead of if(!fileowner()) or if(fileowner() == FLASE) because if the owner was "root" it would return 0.
(PHP 4, PHP 5, PHP 7, PHP 8)
fileowner — 取得文件的所有者
filename文件的路径。
返回文件所有的用户 ID，如果出错则返回 false。用户
ID 以数字格式返回，用
posix_getpwuid() 来将其解析为用户名。
失败时抛出 E_WARNING 警告。
示例 #1 找到文件的所有者
<?php
$filename = 'index.php';
print_r(posix_getpwuid(fileowner($filename)));
?>注意: 此函数的结果会被缓存。参见 clearstatcache() 以获得更多细节。
自 PHP 5.0.0 起, 此函数也用于某些 URL 包装器。请参见 支持的协议和封装协议以获得支持 stat() 系列函数功能的包装器列表。
Remember to use if(fileowner(...) === FALSE) instead of if(!fileowner()) or if(fileowner() == FLASE) because if the owner was "root" it would return 0.Small note: the function resolves symbolic links. That is, if the link is created by user 999 and maps to a file owned by user 666, this function returns 666 :(This function will always return 0 on Windows, because Windows does not support numeric user IDs.