PHP

php get file extension from filename

$ext = pathinfo($filename, PATHINFO_EXTENSION);

php get uploaded file extension

$ext = pathinfo($_FILES["file"]["name"], PATHINFO_EXTENSION);

get extension from filename php

// your file
$file = 'image.jpg';
$info = pathinfo($file);
// Before PHP 5.2
$file_name =  basename($file, '.'.$info['extension']);
// After PHP 5.2
$file_name =  $info['filename'];

php file extension

$ext=pathinfo($file, PATHINFO_EXTENSION);

Get File Extension PHP

//Get File Extension
function getFileExtension($fileName)
{
    return '.' . strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
}