- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
var_dump(preg_match("//u", "\xE38182", $matches));
var_dump($matches);
var_dump(preg_match("//u", "\xE4B880", $matches));
var_dump($matches);
var_dump(preg_match("//u", "\xF0A0808B", $matches));
var_dump($matches);
var_dump(preg_match("//u", "𠀋", $matches));
var_dump($matches);