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    $arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);
    echo json_encode($arr);

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{"a":1,"b":2,"c":3,"d":4,"e":5}

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    $obj->body      = 'another post';
    $obj->id       = 21;
    $obj->approved    = true;
    $obj->favorite_count = 1;
    $obj->status     = NULL;
    echo json_encode($obj);

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    {
    ¡¡¡¡¡¡¡¡"body":"another post",¡¡
    ¡¡¡¡¡¡¡¡"id":21,
    ¡¡¡¡¡¡¡¡"approved":true,
    ¡¡¡¡¡¡¡¡"favorite_count":1,
    ¡¡¡¡¡¡¡¡"status":null
    }

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    $arr = Array('one', 'two', 'three');
    echo json_encode($arr);

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["one","two","three"]

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    $arr = Array('1'=>'one', '2'=>'two', '3'=>'three');
    echo json_encode($arr);

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    {"1":"one","2":"two","3":"three"}

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    json_encode( (object)$arr );

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    json_encode ( $arr, JSON_FORCE_OBJECT );

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    class Foo {
    ¡¡¡¡¡¡¡¡const   ERROR_CODE = '404';
    ¡¡¡¡¡¡¡¡public  $public_ex = 'this is public';
    ¡¡¡¡¡¡¡¡private  $private_ex = 'this is private!';
    ¡¡¡¡¡¡¡¡protected $protected_ex = 'this should be protected';
    ¡¡¡¡¡¡¡¡public function getErrorCode() {
    ¡¡¡¡¡¡¡¡¡¡¡¡return self::ERROR_CODE;
    ¡¡¡¡¡¡¡¡}
    }

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    $foo = new Foo;
    $foo_json = json_encode($foo);
    echo $foo_json;

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{"public_ex":"this is public"}

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    $json = '{"foo": 12345}';¡¡¡¡
    $obj = json_decode($json);¡¡
    print $obj->{'foo'}; // 12345

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    $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';¡¡¡¡
    var_dump(json_decode($json));

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    object(stdClass)#1 (5) {
    ¡¡¡¡
    ¡¡¡¡¡¡¡¡["a"] => int(1)
    ¡¡¡¡¡¡¡¡["b"] => int(2)
    ¡¡¡¡¡¡¡¡["c"] => int(3)
    ¡¡¡¡¡¡¡¡["d"] => int(4)
    ¡¡¡¡¡¡¡¡["e"] => int(5)
    ¡¡¡¡
    }

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    $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
    var_dump(json_decode($json,true));

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    array(5) {
    ¡¡¡¡
    ¡¡¡¡ ¡¡¡¡["a"] => int(1)
    ¡¡¡¡ ¡¡¡¡["b"] => int(2)
    ¡¡¡¡ ¡¡¡¡["c"] => int(3)
    ¡¡¡¡ ¡¡¡¡["d"] => int(4)
    ¡¡¡¡ ¡¡¡¡["e"] => int(5)
    ¡¡¡¡
    }¡¡

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    $bad_json = "{ 'bar': 'baz' }";
    $bad_json = '{ bar: "baz" }';¡¡¡¡
    $bad_json = '{ "bar": "baz", }';

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ÁiÍa£¬jsonÖ»ÄÜÓÃÀ´±iʾ¶ÔÏo£¨object£(C)ºÍÊý×e£¨array£(C)£¬Èç¹u¶ÔÒ»¸o×Öu´®»oÊýֵʹÓÃjson_decode()£¬½«»aµ»Ønull¡£

    var_dump(json_decode("Hello World")); //null

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ÓÉÓÚ¿ª¢Ò»¸oajax file manager for web¿ªÔ´ÏiÄ¿,Êý¾Ý½»»»Ê¹ÓõÄjson¸ñʽ£¬ºoÀ´¢ÏÖÔڵͰae±¾µÄphpÉÏÔËÐлaÓÐÎÊÌa£¬×Ðϸµ÷ÊÔ¢ÏÖjson_decodeºÍjson_encodeÎÞ¨Õý³£¹¤×÷£¬ÓÚÊDzeÔÄ×ÊÁÏ£¬*¢ÏֵͰae±¾µÄphpûÓÐʵÏÖÕaÁ½¸oº¯Êý£¬ÎªÁ˼aeÈÝÐÔ£¬ÎÒÖ»ºÃ×Ô¼ºÊµÏÖÒ»¸ophp°aeµÄjson±aÂe½aÂe´uÂe£¬²¢±£Ö¤ºÍjson2.jsµÄÒ»Ö£¬²aÊÔµ÷ÊÔ²¢Í¨¹ý£¬ÏÖÔÚ½«Æa¹«²¼³oÀ´£¬¹(C)ÓÐÏaͬÐeÇoµÄͬѧʹÓãº

    <?php 
    /* * **************************************************************************** 
     * $base: $ 
     * 
     * $Author: $ 
     *   Berlin Qin 
     * 
     * $History: base.js $ 
     *   Berlin Qin  //     created 
     * 
     * $contacted 
     *   webfmt@gmail.com 
     *   www.webfmt.com 
     * 
     * *************************************************************************** */ 
    /* =========================================================================== 
     * license 
     * 
     * ¡¢Open Source Licenses 
     * webfmt is distributed under the GPL, LGPL and MPL open source licenses. 
     * This triple copyleft licensing model avoids incompatibility with other open source licenses. 
     * These Open Source licenses are specially indicated for: 
     *  Integrating webfmt into Open Source software; 
     *  Personal and educational use of webfmt; 
     *  Integrating webfmt in commercial software, 
     * taking care of satisfying the Open Source licenses terms, 
     *  while not able or interested on supporting webfmt and its development. 
     * 
     * ¡¢Commercial License ¨C fbis source Closed Distribution License - CDL 
     * For many companies and products, Open Source licenses are not an option. 
     * This is why the fbis source Closed Distribution License (CDL) has been introduced. 
     * It is a non-copyleft license which gives companies complete freedom 
     * when integrating webfmt into their products and web sites. 
     * This license offers a very flexible way to integrate webfmt in your commercial application. 
     * These are the main advantages it offers over an Open Source license: 
     *   Modifications and enhancements doesn't need to be released under an Open Source license; 
     *   There is no need to distribute any Open Source license terms alongside with your product 
     * and no reference to it have to be done; 
     *   No references to webfmt have to be done in any file distributed with your product; 
     *   The source code of webfmt doesn't have to be distributed alongside with your product; 
     *   You can remove any file from webfmt when integrating it with your product. 
     * The CDL is a lifetime license valid for all releases of webfmt published during 
     * and before the year following its purchase. 
     * It's valid for webfmt releases also. It includes year of personal e-mail support. 
     * 
     * ************************************************************************************************************************************************* */ 
    function jsonDecode($json) 
    { 
      $result = array(); 
      try 
      { 
        if (PHP_VERSION_ID > ) 
        { 
          $result = (array) json_decode($json); 
        } 
        else 
        { 
          $json = str_replace(array("\\\\", "\\\""), array("&#