3v4l.org

run code in 300+ PHP versions simultaneously
<?php $r = strftime(str_repeat("x", 1025), time()); if (is_string($r)) { var_dump("string:" . strlen($r)); } else { var_dump($r); }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
string(11) "string:1025"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
bool(false)

preferences:
207.78 ms | 403 KiB | 325 Q