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run code in 300+ PHP versions simultaneously
<?php $x = 'ciao </container> e <container tipo="autore"> ciao'; $string = preg_replace('#(\s)?([^\>\s]+)(\s?\<container tipo="autore"\>)#', '\1<autore-sep>\2</autore-sep>\3', $x); echo $string;

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32.75 ms | 402 KiB | 5 Q