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run code in 300+ PHP versions simultaneously
<?php function highlightString($highlightString,$string) { if(strlen($highlightString)>0 && strlen($string)>0) { $s = $highlightString; $rest = $string; $result = $string; do { $rest = stristr($rest,$s); $replace = substr($rest,0,strlen($s)); $result = str_replace($replace,"<span class='textHighlight'>{$replace}</span>",$result); $rest = substr($rest,strlen($s)); } while ($rest !== false); return $result; } return $string; } echo highlightString("M&ouml;hre","M&ouml;hre"); echo highlightString("R&ouml;mer","R&ouml;mer");

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33.21 ms | 402 KiB | 5 Q