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run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array('recursive'); $arr[] = & $arr; var_dump(json_encode($arr)); var_dump(json_last_error()); var_dump(PHP_VERSION_ID >= 50500 ? json_last_error_msg() : NULL);
Output for 5.5.0 - 7.1.0
bool(false) int(6) string(18) "Recursion detected"
Output for 5.3.0 - 5.4.45
Warning: json_encode(): recursion detected in /in/LCdJr on line 4 string(32) "["recursive",["recursive",null]]" int(0) NULL
Output for 5.2.0 - 5.2.17
Warning: json_encode(): recursion detected in /in/LCdJr on line 4 string(32) "["recursive",["recursive",null]]" Fatal error: Call to undefined function json_last_error() in /in/LCdJr on line 5
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/LCdJr on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/LCdJr on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/LCdJr on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/LCdJr on line 4