Description

The grapheme \u{34F} has a weird behavior with grapheme_stripos():

<?php

var_dump(grapheme_stripos("abcdef", "\u{34F}"));
var_dump(grapheme_stripos("abc\u{34F}def", "\u{34F}"));

Resulted in this output:

int(0)
int(0)

But I expected this output instead:

bool(false)
int(3)

Note that on the other hand the following code works as expected:

echo "abc\u{34F}def\n"; // "abcdef"
echo grapheme_strlen("abc\u{34F}def"); // "6"

see https://3v4l.org/vRVCR/rfc#vgit.master

PHP Version

used git.master in 3v4l.org

Operating System

No response