3v4l.org

run code in 300+ PHP versions simultaneously

@ 2015-08-17T22:52:34Z

<?php

// The JSON extension wasn't bundled with PHP until version 5.2.0
if (version_compare(PHP_VERSION, '5.1.6', '<=')) exit('PHP version not supported: json_decode() not available');

// Stop 3v4l.org from showing parse errors in old PHP versions without support for classes or interfaces
else {$_ = __COMPILER_HALT_OFFSET__; eval(substr(file_get_contents(__FILE__), $_ + 2));} __halt_compiler();?>

// Polyfill JsonSerializable
if (!interface_exists('JsonSerializable', FALSE)) {
    interface JsonSerializable {
        public function jsonSerialize();
    }
    function json_serialize(JsonSerializable $object) {
        return json_encode($object->jsonSerialize());
    }
}

interface JsonUnserializable extends JsonSerializable {
    public function jsonUnserialize($json);
}

class User implements JsonUnserializable {
    private $_name;
    public function __construct($name = NULL) {
        $this->setName($name);
    }
    public function setName($name) {
        $this->_name = $name;
    }
    public function getName() {
        return $this->_name;
    }
    public function jsonSerialize() {
        return array('name' => $this->getName());
    }
    public function jsonUnserialize($json) {
        $this->setName($json->name);
    }
}

function json_unserialize($json, $className) {
    if (version_compare(PHP_VERSION, '5.3.9', '>=')) {
        $isUnserializable = is_a($className, 'JsonUnserializable', TRUE);
    } else {
        $isUnserializable = new $className instanceof JsonUnserializable;
    }
    if ($isUnserializable) {
        $object = new $className;
        $object->jsonUnserialize(json_decode($json));
        return $object;
    } else {
        return FALSE;
    }
}

if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
    assert(json_encode(new User('Bar')) === '{"name":"Bar"}');
} else {
    assert(json_serialize(new User('Bar')) === '{"name":"Bar"}');
}

$user = json_unserialize('{"name":"Foo"}', 'User');
var_dump($user->getName());

Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
1 jumps found. (Code = 79) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vvv2g
function name:  (null)
number of ops:  19
compiled vars:  !0 = $_
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   INIT_FCALL                                               'version_compare'
          1        SEND_VAL                                                 '8.0.0'
          2        SEND_VAL                                                 '5.1.6'
          3        SEND_VAL                                                 '%3C%3D'
          4        DO_ICALL                                         $1      
          5      > JMPZ                                                     $1, ->8
          6    > > EXIT                                                     'PHP+version+not+supported%3A+json_decode%28%29+not+available'
          7*       JMP                                                      ->18
    7     8    >   ASSIGN                                                   !0, 399
          9        INIT_FCALL                                               'substr'
         10        INIT_FCALL                                               'file_get_contents'
         11        SEND_VAL                                                 '%2Fin%2Fvvv2g'
         12        DO_ICALL                                         $3      
         13        SEND_VAR                                                 $3
         14        ADD                                              ~4      !0, 2
         15        SEND_VAL                                                 ~4
         16        DO_ICALL                                         $5      
         17        INCLUDE_OR_EVAL                                          $5, EVAL
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0

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