Tells whether the filename is a regular file

# is_file

(PHP 4, PHP 5, PHP 7, PHP 8)

is_file — Tells whether the filename is a regular file

### Description

is_file(string `$filename`): bool

Tells whether the given file is a regular file. If `filename` is a symbolic link, it will resolve the symlink and will give information about the referred 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.

### Errors/Exceptions

Upon failure, an `E_WARNING` is emitted.

### 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)

### 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() - Tells whether the filename is a directory
- is_link() - Tells whether the filename is a symbolic link
- SplFileInfo

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