(PHP 4, PHP 5)
is_readable — Tells whether the filename is readable
Tells whether the filename is readable.
Path to the file.
Returns TRUE if the file or directory specified by filename exists and is readable, FALSE otherwise.
Example #1 is_readable() example
<?php
$filename = 'test.txt';
if (is_readable($filename)) {
echo 'The file is readable';
} else {
echo 'The file is not readable';
}
?>
Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not taken into account before PHP 5.1.5.
Note: 이 함수의 결과는 캐시에 저장합니다. 자세한 설명은 clearstatcache()를 참고하십시오.
PHP 5.0.0부터 이 함수는 몇몇 URL 래퍼를 사용할 수 있습니다. 기능적으로 stat() 패밀리를 지원하는 래퍼 목록은 지원 프로토콜/래퍼 목록를 참고하십시오.
Note: The check is done using the real UID/GID instead of the effective one.