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run code in 300+ PHP versions simultaneously
<?php var_export( preg_replace('/\d{3}\K(\d{2})(\d{3})(\d{3})/', ' $1 $2 $3 ', '90000800123987') );
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
'900 00 800 123 987'
preferences:
132.2 ms | 407 KiB | 5 Q