3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text1 = "prefix:"; $text2 = "prefix: The quick brown fox"; var_dump(substr($text1, 8)); var_dump(substr($text2, 8));
Output for 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
string(0) "" string(19) "The quick brown fox"
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
bool(false) string(19) "The quick brown fox"

preferences:
148.65 ms | 407 KiB | 5 Q