<?php
$re = '~{{[^|]*\|([^|]*)\|[^|]*}}~';
$str = "{{ai|Perseverance|Garen}} is no longer removed by combat dehancing effects such as {{ai|Blood Scent|Warwick}}";
echo $result;
PD9waHAKCiRyZSA9ICd+e3tbXnxdKlx8KFtefF0qKVx8W158XSp9fX4nOyAKJHN0ciA9ICJ7e2FpfFBlcnNldmVyYW5jZXxHYXJlbn19IGlzIG5vIGxvbmdlciByZW1vdmVkIGJ5IGNvbWJhdCBkZWhhbmNpbmcgZWZmZWN0cyBzdWNoIGFzIHt7YWl8Qmxvb2QgU2NlbnR8V2Fyd2lja319IjsgCiRyZXN1bHQgPSBwcmVnX3JlcGxhY2UoJHJlLCAnXDEnLCAkc3RyKTsKZWNobyAkcmVzdWx0Ow==