is_executable
is_link
Filesystem Functions
PHP Manual

# is_file

Tells whether the filename is a regular file

### Description

bool is_file ( string `$filename` )

Tells whether the given file is a regular file.

### Parameters

`filename`

  Path to the file.

### Return Values

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.

### Examples

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)

### Errors/Exceptions

Upon failure, an `E_WARNING` is emitted.

### Notes

> Note: The results of this function are cached. See clearstatcache for more details.

Tip

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.

### See Also

- is_dir
- is_link