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<?php $url = 'https://example.com/sign-up?utm_tag_one=1&utm_tag_two=2'; var_dump(explode('=',explode('&', parse_url($url, PHP_URL_QUERY))));
based on tukne
Output for 5.6.30, hhvm-3.18.5 - 3.21.3, 7.0.30 - 7.3.0rc3
Warning: explode() expects parameter 2 to be string, array given in /in/qeTaj on line 5 NULL
Output for hhvm-3.22.0
Warning: explode() expects parameter 2 to be string, array given in /in/qeTaj on line -1 NULL