UTF8 mb_strpos问题

Question

I am facing realy strange problem i am trying to find a UTF-8 needle in UTF-8 haystack and it just dont want to work properly. Here is an example.

header('Content-Type: text/html; charset=utf-8');
mb_internal_encoding("UTF-8");

vardump(mb_strpos('Příkon', 'Příkon '));

It returns false

header('Content-Type: text/html; charset=utf-8');
mb_internal_encoding("UTF-8");

vardump(mb_strpos('Příkon', 'Příkon'));

this returns 0 (success)

Any ideas?

Answer 1

Well, yes. The error is correct. You've just swapped the $haystack and $needle when calling mb_strpos(string $haystack , string $needle) and so 'Příkon ' can not be found in 'Příkon'. Your call should look like

mb_strpos('Příkon ', 'Příkon');