3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Recursion implements JsonSerializable { public function __construct() { $this->cnt = 2048; } public function jsonSerialize() { if ($this->cnt < 1) { return null; } $this->cnt--; return array($this->cnt => $this); } } var_dump(json_encode(new Recursion(), 0, 2048));
based on DIeTU
Output for hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant  2048 - assumed ' 2048' in /in/K4KOb on line 18 Warning: json_encode() expects parameter 3 to be integer, string given in /in/K4KOb on line 18 NULL
Output for 5.5.0 - 5.6.28
Notice: Use of undefined constant  2048 - assumed ' 2048' in /in/K4KOb on line 18 Warning: json_encode() expects parameter 3 to be long, string given in /in/K4KOb on line 18 NULL
Output for 5.4.0 - 5.4.45
Notice: Use of undefined constant  2048 - assumed ' 2048' in /in/K4KOb on line 18 Warning: json_encode() expects at most 2 parameters, 3 given in /in/K4KOb on line 18 NULL
Output for 5.0.5 - 5.3.29
Fatal error: Interface 'JsonSerializable' not found in /in/K4KOb on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'JsonSerializable' not found in /in/K4KOb on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/K4KOb on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/K4KOb on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/K4KOb on line 3
Process exited with code 255.