php regex for this number to detacted

please any php expert can write regex for below code
Thanks

\n\n(\n\n46320\n\n)
\n\n(\n\n52556\n\n)
\n\n(\n\n46320\n\n)

 

preg_replace("/\D/","", $input); 

PHP:

The "D" is just for "D"igits.

 

or even just 5 digits

<?php


$string = '

\n\n(\n\n46320\n\n)
\n\n(\n\n52556\n\n)
\n\n(\n\n46320\n\n)

';

$do_this = preg_match_all("/(\d{5})/", $string, $match);
foreach ($match[1] as $ht){
  echo $ht . "<br />";
}
?>

PHP:

 

Thanks MyVodaFone can you please convert into php function ?

 

Ah, nicely done. Anyway: function

function number($input) {
  $do_this = preg_match_all("/(\d{5})/", $input, $match);
    foreach ($match[1] as $ht){
    echo $ht . "<br />";
  } 
 }

echo number('    \n\n(\n\n46320\n\n)
        \n\n(\n\n52556\n\n)
        \n\n(\n\n46320\n\n)
        
    ');

PHP: