<?php $x = ' U \yen X \checkmark r \circledR m \maltese p \ulcorner q \urcorner x \llcorner y \lrcorner 99K \dashrightarrow L99 \dashleftarrow \rightleftharpoons \ \angle ~ \hbar 0 \mho < \sqsubset = \sqsupset '; $x = array_filter(preg_split('/\s+/', $x)); usort($x, function ($a, $b) { return strcmp(strtolower($a), strtolower($b)); }); foreach ($x as $xx) { echo $xx, "\n"; }
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