(PHP 4, PHP 5, PHP 7, PHP 8)
is_file — Tells whether the filename is a regular file
$filename): boolTells whether the given file is a regular file.
filenamePath to the file.
Returns true if the filename exists and is a regular file, false
otherwise.
Note: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB.
Upon failure, an E_WARNING is emitted.
Example #1 is_file() example
<?php
var_dump(is_file('a_file.txt')) . "\n";
var_dump(is_file('/usr/bin/')) . "\n";
?>
The above example will output:
bool(true) bool(false)
Note: The results of this function are cached. See clearstatcache() for more details.
As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to Supported Protocols and Wrappers to determine which wrappers support stat() family of functionality.