3v4l.org

run code in 300+ PHP versions simultaneously
<?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);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
string(36) "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" ------------------- string(36) "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
string(26) "1234567890KLMNOPQRSTUVWXYZ" ------------------- string(36) "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
preferences:
93.84 ms | 407 KiB | 5 Q