- var_dump: documentation ( source)
<?php
$c = 'déjà';
// skipped tests
var_dump('jà' === grapheme_substr($c, -2, 3));
var_dump("" === grapheme_substr($c, -1, 0) );
var_dump(false === grapheme_substr($c, 1, -4) );
// issued part
var_dump('à' === grapheme_substr('éà', 1, -2));