3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dec = json_decode('{"a":"A\u2028B"}'); print_r(json_encode($dec)); print_r(json_decode(json_encode($dec, JSON_UNESCAPED_UNICODE)));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
{"a":"A\u2028B"}stdClass Object ( [a] => A
B )
Output for 5.3.0 - 5.3.29
{"a":"A\u2028B"} Notice: Use of undefined constant JSON_UNESCAPED_UNICODE - assumed 'JSON_UNESCAPED_UNICODE' in /in/dcbW0 on line 5 Warning: json_encode() expects parameter 2 to be long, string given in /in/dcbW0 on line 5
Output for 5.2.0 - 5.2.17
{"a":"A\u2028B"} Notice: Use of undefined constant JSON_UNESCAPED_UNICODE - assumed 'JSON_UNESCAPED_UNICODE' in /in/dcbW0 on line 5 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/dcbW0 on line 5
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Call to undefined function json_decode() in /in/dcbW0 on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_decode() in /in/dcbW0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: json_decode() in /in/dcbW0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_decode() in /in/dcbW0 on line 3

preferences:
250.4 ms | 401 KiB | 352 Q