- var_dump: documentation ( source)
- parse_url: documentation ( source)
<?php
$href = 'http://ambulatoriy.ru/nashi-yslugi/profosmotryi.html?&utm_medium=cpc&utm_source=ambulatoriy_yadir&utm_campaign=ambulatoriy&utm_content=proyti_predvaritel&utm_term={keyword}';
$parsed_url = parse_url($href);
unset($parsed_url['scheme']);
$href = http_build_url($parsed_url);
var_dump($href);