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<?php $a = '[audio mp3="https://abcd.com/wp-content/uploads/sites/2/2020/03/classical-demo.mp3"][/audio]'; $b = str_replace("[","<",$a); $b = str_replace("]",">",$b); $b = str_replace("audio","a",$b); // you need to replace mp3=, not mp3, as you have 2 of it $b = str_replace("mp3=","href=",$b); // optional $b = str_replace("><",">link text<",$b); echo $b;
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
<a href="https://abcd.com/wp-content/uploads/sites/2/2020/03/classical-demo.mp3">link text</a>

preferences:
141.89 ms | 407 KiB | 5 Q