- var_dump: documentation ( source)
- filter_var: documentation ( source)
<?php
var_dump(filter_var("https://www.google.ca", FILTER_VALIDATE_URL));
var_dump(filter_var("https://ruserious.www.google.ca", FILTER_VALIDATE_URL));
var_dump(filter_var("http://geriatricmedicine.pulseinfoframe.com/patients", FILTER_VALIDATE_URL));