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PHP filegroup() Function

Last Updated : 24 Apr, 2025

The filegroup() is an inbuilt function in PHP that returns the filegroup. This function returns a group id that can resolve using posix_getgrigid() to a name.

Syntax:

filegroup(string $filename): int|false

Parameter: This function has only one parameter.

filename: A name of the file or path of the file

Return value: This function returns the numerical group id if the function is successful otherwise the function will return “false”. Group id can resolve using the posix_getgrgid() function.

Example 1: The following code demonstrates the filegroup() function.

PHP

<?php 
  
$file = 'text.txt'; 
$group_id = filegroup($file); 
  
// ID of the group we want to check for 
$expected_group_id = 1000;  
  
if ($group_id === $expected_group_id) { 
    echo "The file $file is owned by the expected group."; 
} else { 
    echo "The file $file is not owned by the expected group."; 
} 
  
?>

Output:

The file text.txt is owned by the expected group.

Example 2: In this program, we will print the group id of the file.

PHP

<?php 
  
$fileName = 'text.txt' ; 
  
print_r(filegroup($fileName)); 
  
?>

Note: Output will be different according to your system.

Output:

Reference: https://www.php.net/manual/en/function.filegroup.php

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