3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'Hello John, how are you John. John are you happy with your life John?'; $numberOfInstances = 2; echo implode('dude', explode('John', $string, $numberOfInstances + 1));
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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Hello dude, how are you dude. John are you happy with your life John?
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105.07 ms | 1497 KiB | 4 Q