html - Weird result in php -


why output of code "true" ? 

<?php  if (preg_match("/^[Ī]+$/", "ê")) {     die("true"); } else {     die("false"); }  ?>

the result should false not true!

your strings unicode, if want preg_match work on unicode string should add u modifier:

if (preg_match("/^[Ī]+$/u", "ê")) {

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