3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr=[ 'foo'=>"00XX" ]; var_dump(json_encode($arr,JSON_PARTIAL_OUTPUT_ON_ERROR));
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
string(14) "{"foo":"00XX"}"
preferences:
191.54 ms | 404 KiB | 223 Q