3v4l.org

run code in 300+ PHP versions simultaneously
<?php $buffer = <<<JSON { "format": { "rule": [ "matches", "/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\\d\\\d$/" ], "message": "Applications.submit_birthdate_format" } } JSON; var_dump($buffer, json_decode($buffer), json_last_error(), JSON_ERROR_SYNTAX);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 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 - 8.2.18, 8.3.0 - 8.3.7
string(218) "{ "format": { "rule": [ "matches", "/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\d\\d$/" ], "message": "Applications.submit_birthdate_format" } }" object(stdClass)#2 (1) { ["format"]=> object(stdClass)#1 (2) { ["rule"]=> array(2) { [0]=> string(7) "matches" [1]=> string(66) "/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$/" } ["message"]=> string(36) "Applications.submit_birthdate_format" } } int(0) int(4)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
string(218) "{ "format": { "rule": [ "matches", "/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\d\\d$/" ], "message": "Applications.submit_birthdate_format" } }" object(stdClass)#1 (1) { ["format"]=> object(stdClass)#2 (2) { ["rule"]=> array(2) { [0]=> string(7) "matches" [1]=> string(66) "/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$/" } ["message"]=> string(36) "Applications.submit_birthdate_format" } } int(0) int(4)

preferences:
160 ms | 403 KiB | 184 Q