<?php $photos = [ 'photo-Bname_0333.jpg', 'photo-Bname_0222.jpg', 'photo-Aname_0333.jpg', 'photo-Cname_0111.jpg', 'photo-Cname_0222.jpg', 'photo-Aname_0112.jpg', ]; array_multisort(preg_replace('/.*_/', '', $photos), $photos); var_export($photos);
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