How to remove everything from a string except for the number and put these in an array?

Question

How to remove everything from a string except for the number and put these in an array?

["103","109","110"]

has to be a string with just the numbers.

I am using smarty and tried this.

{assign downloadCats $aMenu.aMenuvars.downloads|ltrim:'['|rtrim:']'}

{','|explode:$downloadCats}
{var_dump($downloadCats)}

Answer 1

You could use regular expressions for this:

preg_match_all("/[0-9]+/", $input, $findings, PREG_SET_ORDER);
foreach ($findings as $value) {
  // do something with the value
}