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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Recursion implements JsonSerializable { public function __construct() { $this->cnt = 500; } public function jsonSerialize() { if ($this->cnt < 1) { return null; } $this->cnt--; return array($this->cnt => $this); } } var_dump(json_encode(new Recursion()));
based on BFp1G
Output for 5.5.0 - 7.1.0
bool(false)
Output for 5.4.4 - 5.4.45
Warning: json_encode(): recursion detected in /in/ZuTti on line 18 string(20) "{"499":{"498":null}}"
Output for 5.4.0 - 5.4.3
string(3890) "{"499":{"498":{"497":{"496":{"495":{"494":{"493":{"492":{"491":{"490":{"489":{"488":{"487":{"486":{"485":{"484":{"483":{"482":{"481":{"480":{"479":{"478":{"477":{"476":{"475":{"474":{"473":{"472":{"471":{"470":{"469":{"468":{"467":{"466":{"465":{"464":{"463":{"462":{"461":{"460":{"459":{"458":{"457":{"456":{"455":{"454":{"453":{"452":{"451":{"450":{"449":{"448":{"447":{"446":{"445":{"444":{"443":{"442":{"441":{"440":{"439":{"438":{"437":{"436":{"435":{"434":{"433":{"432":{"431":{"430":{"429":{"428":{"427":{"426":{"425":{"424":{"423":{"422":{"421":{"420":{"419":{"418":{"417":{"416":{"415":{"414":{"413":{"412":{"411":{"410":{"409":{"408":{"407":{"406":{"405":{"404":{"403":{"402":{"401":{"400":{"399":{"398":{"397":{"396":{"395":{"394":{"393":{"392":{"391":{"390":{"389":{"388":{"387":{"386":{"385":{"384":{"383":{"382":{"381":{"380":{"379":{"378":{"377":{"376":{"375":{"374":{"373":{"372":{"371":{"370":{"369":{"368":{"367":{"366":{"365":{"364":{"363":{"362":{"361":{"360":{"359":{"358":{"357":{"356":{"355":{"354":{"353":{"352":{"351":{"350":{"349":{"348":{"347":{"346":{"345":{"344":{"343":{"342":{"341":{"340":{"339":{"338":{"337":{"336":{"335":{"334":{"333":{"332":{"331":{"330":{"329":{"328":{"327":{"326":{"325":{"324":{"323":{"322":{"321":{"320":{"319":{"318":{"317":{"316":{"315":{"314":{"313":{"312":{"311":{"310":{"309":{"308":{"307":{"306":{"305":{"304":{"303":{"302":{"301":{"300":{"299":{"298":{"297":{"296":{"295":{"294":{"293":{"292":{"291":{"290":{"289":{"288":{"287":{"286":{"285":{"284":{"283":{"282":{"281":{"280":{"279":{"278":{"277":{"276":{"275":{"274":{"273":{"272":{"271":{"270":{"269":{"268":{"267":{"266":{"265":{"264":{"263":{"262":{"261":{"260":{"259":{"258":{"257":{"256":{"255":{"254":{"253":{"252":{"251":{"250":{"249":{"248":{"247":{"246":{"245":{"244":{"243":{"242":{"241":{"240":{"239":{"238":{"237":{"236":{"235":{"234":{"233":{"232":{"231":{"230":{"229":{"228":{"227":{"226":{"225":{"224":{"223":{"222":{"221":{"220":{"219":{"218":{"217":{"216":{"215":{"214":{"213":{"212":{"211":{"210":{"209":{"208":{"207":{"206":{"205":{"204":{"203":{"202":{"201":{"200":{"199":{"198":{"197":{"196":{"195":{"194":{"193":{"192":{"191":{"190":{"189":{"188":{"187":{"186":{"185":{"184":{"183":{"182":{"181":{"180":{"179":{"178":{"177":{"176":{"175":{"174":{"173":{"172":{"171":{"170":{"169":{"168":{"167":{"166":{"165":{"164":{"163":{"162":{"161":{"160":{"159":{"158":{"157":{"156":{"155":{"154":{"153":{"152":{"151":{"150":{"149":{"148":{"147":{"146":{"145":{"144":{"143":{"142":{"141":{"140":{"139":{"138":{"137":{"136":{"135":{"134":{"133":{"132":{"131":{"130":{"129":{"128":{"127":{"126":{"125":{"124":{"123":{"122":{"121":{"120":{"119":{"118":{"117":{"116":{"115":{"114":{"113":{"112":{"111":{"110":{"109":{"108":{"107":{"106":{"105":{"104":{"103":{"102":{"101":{"100":{"99":{"98":{"97":{"96":{"95":{"94":{"93":{"92":{"91":{"90":{"89":{"88":{"87":{"86":{"85":{"84":{"83":{"82":{"81":{"80":{"79":{"78":{"77":{"76":{"75":{"74":{"73":{"72":{"71":{"70":{"69":{"68":{"67":{"66":{"65":{"64":{"63":{"62":{"61":{"60":{"59":{"58":{"57":{"56":{"55":{"54":{"53":{"52":{"51":{"50":{"49":{"48":{"47":{"46":{"45":{"44":{"43":{"42":{"41":{"40":{"39":{"38":{"37":{"36":{"35":{"34":{"33":{"32":{"31":{"30":{"29":{"28":{"27":{"26":{"25":{"24":{"23":{"22":{"21":{"20":{"19":{"18":{"17":{"16":{"15":{"14":{"13":{"12":{"11":{"10":{"9":{"8":{"7":{"6":{"5":{"4":{"3":{"2":{"1":[null]}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}"
Output for 5.0.5 - 5.3.29
Fatal error: Interface 'JsonSerializable' not found in /in/ZuTti on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'JsonSerializable' not found in /in/ZuTti 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/ZuTti 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/ZuTti on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/ZuTti on line 3
Process exited with code 255.