3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function test($a) { fwrite($a, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'); fseek($a, 0); fwrite($a, '1234567890'); fseek($a, 0); var_dump(fread($a, 1024)); fclose($a); } $a = fopen('php://temp', 'a+'); test($a); echo '-------------------' . PHP_EOL; $a = fopen(tempnam(sys_get_temp_dir(), 'hello'), 'a+'); test($a);
based on 6KlYg
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.28 - 7.2.11
string(26) "1234567890KLMNOPQRSTUVWXYZ" ------------------- string(36) "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"