Check if Two Videos are the Same using php - php

Question

I have search many time but i did not find any solution so in this case i can not post any code. sorry for this.
I have faced a problem that how can i check that 2 or more video same like i have media folder and many video upload in this folder then when i upload new video then need to check that video already exit or not.
1. if i have video demo.mp4 then when i will try to upload same video then give error
2. if i change video name like demo.mp4 to demo1.mp4 then i will give same error cause video name different but video content same
3. if i upload video demo5.mp4 then show me no error
i already checked image compare using
include('compareImages.php');
$new_image_name = $uploadfile_temp;
$compareMachine = new compareImages($new_image_name);
$image1Hash = $compareMachine->getHasString();
$files = glob("uploads/*.*");
$check_image_duplicate = 0;
for ($i = 0; $i < count($files); $i++) {
$filename = $files[$i];
$image2Hash = $compareMachine->hasStringImage($filename);
$diff = $compareMachine->compareHash($image2Hash);
if($diff < 10){
$check_image_duplicate = 1;
//unlink($new_image_name);
break;
}
}
but i can not compare video. someone help me

Answer 1

Tested and works fine, code taken from :http://php.net/manual/en/function.md5-file.php#94494 not mine.
<?php
define('READ_LEN', 4096);
if(files_identical('demo.mp4', 'demo1.mp4'))
echo 'files identical';
else
echo 'files not identical';
// pass two file names
// returns TRUE if files are the same, FALSE otherwise
function files_identical($fn1, $fn2) {
if(filetype($fn1) !== filetype($fn2))
return FALSE;
if(filesize($fn1) !== filesize($fn2))
return FALSE;
if(!$fp1 = fopen($fn1, 'rb'))
return FALSE;
if(!$fp2 = fopen($fn2, 'rb')) {
fclose($fp1);
return FALSE;
}
$same = TRUE;
while (!feof($fp1) and !feof($fp2))
if(fread($fp1, READ_LEN) !== fread($fp2, READ_LEN)) {
$same = FALSE;
break;
}
if(feof($fp1) !== feof($fp2))
$same = FALSE;
fclose($fp1);
fclose($fp2);
return $same;
}
?>