Online PHP editor | refs for dLfcf

<?php $artlit = '<ul> <li>Aliev BF.</li> <li>Zyzov IM, Gazhva SI.</li> <li>Mamedzade RE.</li> <li>Mitronin AV, Platonova ASh</li> <li>Nasirova HB.</li> </ul>'; $doi = '2129-8124-2022-3-81-7-12'; $i = 0; $str = ''; $artlit = str_replace(array('<ul>', '</ul>', '</li>'), array('<citation_list>', '</citation_list>', "</unstructured_citation>\n</citation>"), $artlit); $artlit = preg_replace_callback('/<li>/', function ($m) use ($doi, &$i) { return '<citation key="key-'. $doi .'-'. $i++ . '">' . "\n<unstructured_citation>"; }, $artlit); $str .= $artlit; echo $str;