Search value within Google url

Question

I would like to know how to search and make appear only the values of the URL of Google video, seeking a specific value. In this case I have this code below, with everything not getting the value 0B7fH_c8_hjWVY1pQQVc3dGgxOWs between the /d/ and the /preview.

How can I resolve this so that the result of The item value is 0B7fH_c8_hjWVY1pQQVc3dGgxOWs:

<?php // Retorna um valor na posição 2 pegando o dominio do item como base pra retirar o ID
function buscarID ($urlGeral, $dominio) {
preg_match("/^.*($dominio\/)(\d+)-*/", $urlGeral, $valores);
return $valores[2];
}

echo 'O valor do item e '.buscarID('https://docs.google.com/file/d/0B7fH_c8_hjWVY1pQQVc3dGgxOWs/preview', "docs.google.com"); ?>

Answer 1

Try using regex like this:

preg_match('file\/d\/(.*?)\/preview', $urlGeral, $valores);

Also, remember that using the "$variavel" PHP, PHP puts exactly what the variable has into the string. That is, your Regex would look like this:

^.*(docs.google.com\/)(\d+)-*

But that doesn’t add up to anything $urlGeral.

A great tool to test regex is regex., that shows you exactly what is being found.