3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str= "word1 word2 word3 word4 "; var_export(str_word_count($str, 1, '0..9'));
Output for 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 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
array ( 0 => 'word1', 1 => 'word2', 2 => 'word3', 3 => 'word4', )
preferences:
97.23 ms | 1405 KiB | 4 Q