PHP finfo_file() Function

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The finfo_file() function is an inbuilt function in PHP that is used for getting information about a file.

Syntax:

Procedural Style:

public finfo_file(
    string $filename, 
    int $flags = FILEINFO_NONE, 
    ?resource $context = null
): string|false

Object-Oriented Style:

public finfo::file(
    string $filename, 
    int $flags = FILEINFO_NONE, 
    ?resource $context = null
): string|false

Parameters: This function accept four parameters that are described below:

finfo: It specifies an instance for finfo, which returns by finfo_open().
filename: It specifies the name of the file that we want to check.
flags: This is file info constants.
context: By default, this null is assigned for a description of contexts.

Return Value: This function returns the textual description of the content of file, or false if an error occurred

Example 1: In the below example, we will print the file information using the finfo_file() function.

PHP

<?php 
$finfoinstance = finfo_open(FILEINFO_MIME,null);  
  
if(!($finfoinstance)){ 
    echo "Opening file data is failed" ; 
    exit() ; 
} 
  
// Return file MIME 
$filename = "./text.txt"; 
echo finfo_file($finfoinstance,$filename); 
finfo_close($finfoinstance) ; 
?>

Output:

application/x-empty; charset=binary

Example 2: In the below example, we will print the file information using finfo_file() functions.

PHP

<?php 
$finfo = finfo_open(FILEINFO_MIME_TYPE);  
foreach (glob("*") as $filename) { 
    echo finfo_file($finfo,$filename) . "\n"; 
} 
finfo_close($finfo); 
?>