3v4l.org

run code in 300+ PHP versions simultaneously
<?php $content = '12345678 ciao come'; $start = 9; var_dump( strpos( $content, ' ', $start-1 ) ); var_dump( substr( $content, $start, 154 ) );
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(8) string(9) "ciao come"

preferences:
196.2 ms | 404 KiB | 237 Q