{"id":134984,"date":"2020-07-09T05:51:51","date_gmt":"2020-07-08T21:51:51","guid":{"rendered":"http:\/\/4563.org\/?p=134984"},"modified":"2020-07-09T05:51:51","modified_gmt":"2020-07-08T21:51:51","slug":"php-%e9%87%8c-emptyobject%e6%98%af-false-%e8%bf%98%e6%98%af-true","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=134984","title":{"rendered":"PHP \u91cc empty((object)[])\u662f false \u8fd8\u662f true?"},"content":{"rendered":"
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PHP \u91cc empty((object)[])\u662f false \u8fd8\u662f true? <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/i> 18<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u8fd9\u4e48\u8bbe\u8ba1\u662f\u5426\u7b26\u5408\u76f4\u89c9? <\/div>\n
\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (32<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ksaa0096329 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    false
    \u6709\u65f6\u95f4\u6765\u95ee,\u65e9\u5c31\u6d4b\u8bd5\u51fa\u6765\u4e86.
    \u518d\u8bf4\u4e86 \u4f60\u8fd9\u79cd\u5199\u6cd5\u6709\u4ec0\u4e48\u610f\u4e49. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : iamverylovely <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7b26\u5408\u554a\uff0c\u4e0d\u7136\u53c8\u8981 emptyObject(); <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zarte <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    false \u4e00\u5b9a\u662f\u7528\u4e86\u90a3\u4e9b\u67e5\u8be2\u56de\u6765\u662f obj \u7684 orm \u4e86\u5427\uff0c\u54c8\u54c8\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lovecy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    empty\uff0c\u53ea\u9488\u5bf9
    0\uff0c\u7a7a string\uff0c\u7a7a\u6570\u7ec4\uff0cfalse\uff0c’0’\uff0cnull\uff0c\u672a\u5b9a\u4e49\u53d8\u91cf
    \u8fd9\u51e0\u79cd\u8fd4\u56de true\uff0c\u5176\u4ed6\u90fd\u662f false
    \u6bd5\u7adf object \u5224\u65ad\u662f\u6bd4\u8f83\u590d\u6742\u7684\uff0c\u9664\u975e\u65b0\u589e\u4e00\u4e2a__empty \u9b54\u672f\u65b9\u6cd5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jhdxr <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f5c\u4e3a\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5224\u65ad empty \u975e\u7a7a\uff0c\u6211\u89c9\u5f97\u6ca1\u5565\u4e0d\u7b26\u5408\u76f4\u89c9\u7684\u3002\u5927\u6982\u60f3\u4e86\u60f3\u597d\u50cf\u6ca1\u5565\u8bed\u8a00\u4f1a\u9ed8\u8ba4\u63d0\u4f9b\u4e00\u4e2a\u5224\u65ad object \u4e3a\u7a7a\u7684\u60c5\u51b5\uff1f<\/p>\n

    JSON.parse(‘{}’)==null
    false <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jhdxr <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u300e\u4e0d\u533a\u5206 map \u548c list\uff0c\u770b\u4f3c\u5f88\u7075\u6d3b\uff0c\u4f46\u540c\u65f6\u4e5f\u6709\u4e0d\u5c11\u5751\u300f\u8fd9\u53e5\u8bdd\u6211\u4e0d\u53cd\u5bf9\uff0c\u5728\u505a spread operator \u76f8\u5173\u7684\u4e1c\u897f\u7684\u65f6\u5019\u7684\u786e\u5c31\u6389\u8fdb\u53bb\u8fc7\u3002<\/p>\n

    \u4f46\u662f\u5c31\u4f60\u8fd9\u4e2a\u5e16\u5b50\uff0c\u4f60\u6df7\u6dc6\u4e86 map \u548c object <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @jhdxr \u56e0\u4e3a PHP \u4e2d\u60f3\u8981 json_encode \u4e4b\u540e\u5f97\u5230{}\u800c\u4e0d\u662f[]\uff0c\u6700\u7b80\u4fbf\u7684\u65b9\u5f0f\u5c31\u662f\u7528 object\uff0c\u4e0d\u7ba1\u662f(object)[]\u8fd8\u662f new stdClass \u6216 new class{}\uff0c\u7c7b\u578b\u5c31\u53d8\u6210\u4e86 array | object\uff0c\u57cb\u4e0b\u4e86\u4e00\u4e2a\u5751\u3002\u51e0\u5c42\u8c03\u7528\u4e4b\u540e\uff0c\u540e\u9762\u7684\u4eba\u5bb9\u6613\u5ffd\u89c6\u6389\u8fd9\u4e2a\u7ec6\u8282\u3002<\/p>\n

    \u67d0\u4e9b PHP \u9879\u76ee\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u9ebb\u70e6\uff0c\u5e72\u8106\u7ea6\u5b9a JSON \u4e2d\u6240\u6709\u503c\u4e3a[]\u6216{}\u7684\u5b57\u6bb5\u90fd\u4f20 null \u6216\u4e0d\u5305\u542b\u8fd9\u4e2a\u5b57\u6bb5\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jhdxr <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sagaxu \u5728\u6211\u7684\u7406\u89e3\u4e2d\uff0cjson_encode \u67d0\u79cd\u610f\u4e49\u4e0a\u4e5f\u5df2\u7ecf\u662f view \u5c42\u7684\u4e1c\u897f\uff0c\u90a3\u4e48\u6709\u8bf8\u5982\u67d0\u4e9b\u5b57\u6bb5\u5e94\u8be5\u662f map \u800c\u975e array \u8fd9\u79cd\u9650\u5236\u4e5f\u5e94\u8be5\u5728\u8fd9\u4e00\u5c42\u53bb\u505a\u6389\uff0c\u800c\u975e\u76f4\u63a5\u901a\u8fc7\u4fee\u6539\u539f\u59cb\u7684\u6570\u636e\u53bb\u5b9e\u73b0\u3002<\/p>\n

    \u4f20 null \u8fd9\u4e2a\u65b9\u6848\u4e2a\u4eba\u8ba4\u4e3a\u975e\u5e38\u4e0d\u59a5\uff0c\u4e24\u8005\u7684\u8bed\u4e49\u4e0d\u5b8c\u5168\u76f8\u540c <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : DavidNineRoc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3b\u8fd9\u79cd\u53ea\u4f20\u9012\u4e00\u4e2a {} \u6211\u662f\u6ca1\u770b\u61c2,\u4e3a\u4ec0\u4e48\u4f60\u7684\u8fd9\u4e2a\u8bed\u4e49\u5c31\u597d\u4e86.
    \u4e2a\u4eba\u8ba4\u4e3a\u6b63\u786e\u7684
    \/\/ \u6b63\u5e38
    {
    “data”: {
    “id”: 1,
    “name: “foo”
    }
    }<\/p>\n

    \/\/ \u7a7a\u5bf9\u8c61
    {
    “data”: {
    \/\/ \u540c\u7c7b\u578b
    “id”: null or -1,
    “name”: “”,
    }
    }<\/p>\n

    \/\/ \u4e3b\u7684, \u8fd9\u4e2a\u8ba9\u524d\u7aef\u600e\u4e48\u5224\u65ad, getAttribute \u4e4b\u524d\u5148 if exists ?
    {
    “data”: {<\/p>\n

    }
    }<\/p>\n

    \/\/ \u8fd8\u4e0d\u5982\u76f4\u63a5\u7ed9\u4e2a null, \u524d\u7aef\u77e5\u9053\u4e0d\u7528\u89e3\u6790\u4e86
    {
    “data”: null,
    }<\/p>\n

    \u4e0d\u8fc7\u6bcf\u79cd\u65b9\u6cd5\u90fd\u53ef\u4ee5,\u4e00\u5207\u6700\u91cd\u8981\u7684\u662f\u7ea6\u5b9a. <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : JJstyle <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf4\u767d\u4e86 php \u5c31\u662f\u5751\uff0c\uff5b\uff5d\u5728 json_decode \u4e4b\u540e\u4f1a\u53d8\u6210[]\uff0c\u6ca1\u5f97\u6d17\uff0c\u6240\u4ee5\u6709\u65f6\u5019\u6211\u4eec\u5bf9\u4e8e\u52a8\u6001\u7ed3\u6784\u7684 json \u90fd\u662f\u76f4\u63a5\u8fd4\u56de\u5b57\u7b26\u4e32\u7ed9\u524d\u7aef\uff0c\u8ba9\u4ed6\u4eec\u89e3\u6790 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @DavidNineRoc
    prop \u53ef\u80fd\u662f 0 \u4e2a\u4e5f\u53ef\u80fd\u662f\u51e0\u5341\u4e2a
    {
    prop1: value1,
    prop2: value2,
    …
    }\uff0c0 \u4e2a\u5c5e\u6027\uff0c\u7528{}\u662f\u5f88\u7b26\u5408\u9884\u671f\u7684
    \u53e6\u4e00\u79cd\u65b9\u5f0f\u6253\u6563\u6210 list
    [
    {name:prop1, value:value1},
    {name:prop2, value:value2},
    ]\uff0c\u7136\u540e\u7531\u8c03\u7528\u8005\u81ea\u5df1\u7ec4\u88c5\u6210 map \u6216 object \u4f7f\u7528\uff0c\u7136\u540e\u7528[]\u8868\u793a 0 \u4e2a
    @jhdxr \u6709\u65f6\u5019\u53ea\u662f\u8f6c\u53d1\u548c\u7b80\u5355\u7ef4\u62a4\uff0c\u6bd4\u5982\u67d0\u4e2a\u4e2d\u95f4\u4ef6\uff0c\u5bf9\u5177\u4f53\u6570\u636e\u7ed3\u6784\u662f\u4e0d\u77e5\u60c5\u7684\uff0c\u53ea\u77e5\u9053\u4e00\u4e9b common \u7684\u5b57\u6bb5\uff0cdecode \u540e\u7a0d\u5fae\u6539\u6539\u518d encode \u56de\u6765\uff0c\u78b0\u5230{}\u53d8[]\u7684\u60c5\u51b5\uff0c\u5c31\u4e0d\u80fd\u7b80\u5355\u5904\u7406\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : NjcyNzMzNDQ3 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sagaxu
    1 \u3001\u89e3\u51b3\u4e3b\u4e0d\u60f3\u8fd4\u56de NULL\uff0c\u4e0d\u7528\u4f60\u8d39\u529b empty\uff0c\u53e6\u5916 json \u91cc\u201c[]\uff0c{}\u201d\u4e0d\u5f71\u54cd\u524d\u7aef\u505a\u5224\u65ad<\/p>\n

    <?php<\/p>\n

    $linksArray = [1, 4, “0”, “V”, null, false, true, ‘true’, “N”];
    var_dump(json_encode(array_map(‘strval’, $linksArray)));<\/p>\n

    @JJstyle
    1 \u3001\uff5b\uff5d\u5728 json_decode \u4e4b\u540e\u4f1a\u53d8\u6210 []\uff0cemm\uff0cphp \u9ed8\u8ba4\u89e3\u6790 object \u7684
    2 \u3001\u52a8\u6001\u89e3\u6790\u7684 json \u76f4\u63a5\u8fd4\u56de\u5b57\u7b26\u4e32\uff0c\u8ba9\u524d\u7aef\u5224\u65ad\u662f\u5426\u662f\u5b57\u7b26\u4e32\u6216\u8005\u662f JSON\uff0c\u8fd9\u64cd\u4f5c\u771f\u662f\u770b\u4e0d\u61c2\u3002\u6211\u8ba4\u4e3a\u5728\u5236\u8ba2 API \u3001\u6570\u636e\u7ed3\u6784\u65f6\u5c31\u80fd\u89e3\u51b3\u8fd9\u4e9b\u5947\u602a\u7684\u95ee\u9898\u3002<\/p>\n

    <?php<\/p>\n

    \/\/ default object
    var_dump(json_decode(‘{}’)); \/\/ object(stdClass)#1 (0) { }<\/p>\n

    \/\/ array
    var_dump(json_decode(‘{}’, true)); \/\/ array(0) { }<\/p>\n

    \u6700\u540e\u8bf4\u4e00\u70b9\u8bed\u8a00\u90fd\u6709\u5b58\u5728\u7684\u9053\u7406\uff0c\u4e0d\u8981\u6367\u4e00\u4e2a\u8bed\u8a00\u8e29\u4e00\u4e2a\u8bed\u8a00\uff0c\u6211\u8ba4\u4e3a\u8fd9\u4e2a\u884c\u4e3a\u5f88 low <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : brader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @JJstyle \u4f60\u4ed4\u7ec6\u4e86\u89e3\u8fc7 php \u7684 json_encode \u51fd\u6570\u4e86\u5417\uff1f\u770b\u624b\u518c\u4e86\u5417\uff1f\u8fd9\u53e5\u8bdd\u4e5f\u9001\u7ed9\u4e0a\u7684\u4e00\u4e9b\u4eba\u3002
    \u9ebb\u70e6\u53bb\u770b\u770b json_encode \u7684 JSON_FORCE_OBJECT \u53c2\u6570\u597d\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @NjcyNzMzNDQ3 \u524d\u7aef\u4e0d\u4ec5\u4ec5\u662f js\uff0c\u8fd8\u6709\u5ba2\u6237\u7aef\uff0c\u7c7b\u578b\u4e0d\u5339\u914d\u89e3\u6790\u4f1a\u62a5\u9519 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : pinews <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3b\uff0c\u8bf4\u6e05\u695a\u4f60\u5230\u5e95\u60f3\u600e\u4e48\u6837\uff1f php \u662f\u5f31\u7c7b\u8bed\u8a00\uff0c\u5f88\u591a\u65f6\u5019\u662f\u4f18\u52bf\uff0c\u4f60\u975e\u8981\u53cd\u8fc7\u6765\u628a\u4f18\u52bf\u5f53\u52a3\u52bf\u7528\uff0c\u8981\u4e0d\u7528===\uff0c\u65e2\u7136\u662f\u4e0d\u719f\u6089\u7684\u5730\u65b9\uff0c\u5c31\u522b\u8d38\u7136\u7528== <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @brader \u4e24\u4e2a\u7a7a\u6570\u7ec4\uff0c\u4e00\u4e2a\u8981\u5e8f\u5217\u5316\u6210[]\uff0c\u53e6\u4e00\u4e2a\u8981{}\uff0cforceobject \u4e00\u5200\u5207\u663e\u7136\u662f\u4e0d\u884c\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : brader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sagaxu \u5b8c\u5168\u6ca1\u6709\u95ee\u9898\u597d\u5417\uff1f\u4f60\u53ef\u4ee5\u53bb\u6d4b\u8bd5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : brader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sagaxu
    $b = ‘{“a”:1,”b”:{},”c”:[]}’;
    $b = json_decode($b);
    $b = json_encode($b);<\/p>\n

    \u53cd\u5e8f\u5217\u5316\u548c\u5e8f\u5217\u5316\u51fa\u6765\u7684\u5b57\u7b26\u4e32\uff0c\u4e00\u6837\u7684 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Erroad <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @brader \u4f60\u8bb2\u7684\u9053\u7406\u90fd\u6ca1\u9519\uff0c\u4f46\u662f\u4eba\u5bb6\u95ee\u7684\u662f”\u4e24\u4e2a\u7a7a\u6570\u7ec4\uff0c\u4e00\u4e2a\u8981\u5e8f\u5217\u5316\u6210[]\uff0c\u53e6\u4e00\u4e2a\u8981{}” <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : brader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Erroad \u9700\u8981\u5e8f\u5217\u5316\u6210{}\u7684\uff0c\u52a0 JSON_FORCE_OBJECT \u53c2\u6570\u4e0d\u5c31\u597d\u4e86\u5417\uff1f
    \u5982\u679c\u662f\u5728\u4e00\u4e2a\u5730\u65b9\u6709[]\u548c{}\u7684\uff0c\u90a3\u5728\u5e8f\u5217\u5316\u524d\u4fdd\u6301\u597d\u6570\u636e\u7c7b\u578b\u4e0d\u5c31\u5bf9\u4e86\uff1f\u6709\u4ec0\u4e48\u95ee\u9898\u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sagaxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @brader \u628a map \u90fd decode \u6210 stdClass \u4e5f\u662f\u4e00\u79cd\u529e\u6cd5\uff0c\u4f46\u8ddf\u7528(object)[]\u8868\u793a{}\u6ca1\u4ec0\u4e48\u4e0d\u540c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : brader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sagaxu \u4f60\u8bf4\u5199\u6cd5\u95ee\u9898\u7684\u8bdd\uff0c\u6211\u89c9\u5f97(object)[]\u6ca1\u5565\u4e0d\u597d\u7684\uff0c\u8fd9\u4e2a\u8bed\u610f\u975e\u5e38\u660e\u786e\uff0c\u4ee3\u7801\u53ef\u8bfb\u6027\u4e5f\u597d\uff0c\u4f46\u7b80\u6d01\u6027\u6709\u5f85\u52a0\u5f3a\uff0c\u5728\u5b98\u65b9\u8fd8\u4e0d\u652f\u6301{}\u7684\u5199\u6cd5\u4e4b\u524d\uff0c\u6211\u4eec\u53ea\u80fd\u8fd9\u4e48\u5199\uff0c\u4f60\u60f3\u6539\u53d8\u4ed6\uff0c\u53ef\u4ee5\u63d0\u8bae\u3002<\/p>\n

    \u4f60\u8981\u60f3\u60f3\uff0c\u4ee5\u524d\u6570\u7ec4\uff0c\u8fd8\u8981\u5199 array()\u5462\uff0c\u73b0\u5728\u53d8\u6210[]\uff0c\u4e0d\u5c31\u662f\u6709\u4e9b\u81f4\u529b\u6539\u53d8\u5b83\u7684\u4eba\u7684\u52aa\u529b\u5417 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : JJstyle <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @brader \u6211\u9700\u8981\u7684\u662f\u4e00\u4e2a\u5bf9\u8c61\u6570\u7ec4\uff0c\u800c\u52a0\u4e0a\u53c2\u6570\u540e\u53d8\u6210\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff1a<\/p>\n

    https:\/\/gist.github.com\/Jaggle\/9338af5321d3294d86d350fd2cad0fc9