The finfo_file Function

The finfo_file function determines the MIME type of file contents. Its first parameter accepts a resource returned by the finfo_open function, and the second - the path to the file. The function returns a string with the MIME type or false on error.

Syntax

finfo_file(
	resource $finfo,
	string $filename,
	int $options = FILEINFO_NONE,
	resource $context = null
): string|false

Example

Let's determine the MIME type of the file 'image.png':

<?php
	$finfo = finfo_open(FILEINFO_MIME_TYPE);
	$res = finfo_file($finfo, 'image.png');
	finfo_close($finfo);
	echo $res;
?>

Code execution result:

'image/png'

Example

Let's try to determine the type of a non-existent file:

<?php
	$finfo = finfo_open(FILEINFO_MIME_TYPE);
	$res = finfo_file($finfo, 'nonexistent.file');
	finfo_close($finfo);
	var_dump($res);
?>

Code execution result:

false

Example

Let's determine the MIME type of a text file:

<?php
	$finfo = finfo_open(FILEINFO_MIME_TYPE);
	$res = finfo_file($finfo, 'document.txt');
	finfo_close($finfo);
	echo $res;
?>

Code execution result:

'text/plain'

The finfo_file Function

Syntax

Example

Example

Example

See Also