3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set('zlib.output_compression', 'On'); $v = ini_get('zlib.output_compression'); header('Content-Type: image/svg+xml'); var_dump($v, ini_get('zlib.output_compression'));
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(2) "On" string(2) "On"
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
string(2) "On" string(1) "0"
preferences:
116.89 ms | 407 KiB | 5 Q