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  1. <?php
  2. $regex = '/(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])/';
  3. echo mb_strtolower(preg_replace($regex, '-', "HelloWorldThisIsATest"));
  4. echo "\n";
  5. echo mb_strtolower(preg_replace($regex, '-', "HelloWorldHTMLTest"));
Success #stdin #stdout 0.01s 20568KB
comments (?)
stdin 
Standard input is empty
stdout 
hello-world-this-is-a-test
hello-world-html-test
https://ideone.com/r1EqCY
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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