Add / to the list of chars you want to keep
<?php $jurnalName = "TL 110/90-12 K93-N02 AHM+"; $name = htmlspecialchars(htmlentities($jurnalName)); $name = preg_replace('/[^A-Za-z0-9|\-\s\+\/]/', '', $name); var_dump($name);
(I also changed the space for \s and scaped the plus +, its optional here but I think its a good practice for characters that have spetial meaning inside regex
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