It's quite annoying that PHP code completion complete also parameter for parameters which are already existing. You can take a look for better behavior into Java editor.

use case 1:
1, invoke CC on | place and confirm "stripos" function
<?php
    echo stripo|("hello", "e");
?>
2, you will get...
<?php
    echo stripos($haystack, $needle)("hello", "e");
?>


use case 2:
1, write this text into editor...
<?php
    echo stripos("hello", "e");
?>
2, doubleclick on "stripos" and write and chose from CC another method with allowed 2 strings as parameters

Expected code is just:
<?php
    echo stripos($haystack, $needle)("hello", "e");
?>