{"id":187829,"date":"2020-11-10T00:39:14","date_gmt":"2020-11-09T16:39:14","guid":{"rendered":"http:\/\/4563.org\/?p=187829"},"modified":"2020-11-10T00:39:14","modified_gmt":"2020-11-09T16:39:14","slug":"%e6%83%b3%e9%97%ae%e4%b8%8b%ef%bc%8c-php-%e7%9a%84%e9%a1%b9%e7%9b%ae%e4%b8%ad%ef%bc%8c%e6%9c%89%e6%b2%a1%e6%9c%89%e8%bf%99%e6%a0%b7%e5%86%99%e8%bf%87%e4%bb%a3%e7%a0%81%e7%9a%84%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=187829","title":{"rendered":"\u60f3\u95ee\u4e0b\uff0c PHP \u7684\u9879\u76ee\u4e2d\uff0c\u6709\u6ca1\u6709\u8fd9\u6837\u5199\u8fc7\u4ee3\u7801\u7684\uff1f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u60f3\u95ee\u4e0b\uff0c PHP \u7684\u9879\u76ee\u4e2d\uff0c\u6709\u6ca1\u6709\u8fd9\u6837\u5199\u8fc7\u4ee3\u7801\u7684\uff1f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : xxbutoo <\/span>  <span><i><\/i> 1<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>$a = [&#8216;name&#8217;=&gt;&#8217;zhangsan&#8217;,&#8217;age&#8217;=&gt;18];<\/p>\n<p><code>if (count($a) == 0) {<\/code> <br \/> echo &#8220;array is empty&#8221;;<br \/> } else foreach($a as $k =&gt; $v) {<br \/> echo $v;<br \/> }<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>42<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"4087656\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : sheeta <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6ca1\u6709                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087657\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : vibbow <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u662f\u5f88\u5e38\u7528\u7684\u7528\u6cd5\u3002\u4e0d\u8fc7\u8fd9\u4e2a if \u662f\u591a\u4f59\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087658\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : xxbutoo <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @vibbow \u4e0d\u5199 if \u600e\u4e48\u51f8\u663e else \u540e\u9762\u7684 statement (\u5927\u7b11\u5927\u7b11\u7b11\u5927)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087659\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : vibbow <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @xxbutoo foreach \u9047\u5230\u7a7a\u6570\u7ec4\u662f\u4e0d\u4f1a\u62a5\u9519\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087660\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : xiaoao4568 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u4e5f\u592a\u4e0d\u89c4\u8303\u4e86\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087661\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : taxiaohaohhh <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u592a\u9a9a\u4e86\u3002\u5199\u4e0d\u51fa\u6765                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087662\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : sadfQED2 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u4e0d\u57fa\u672c\u64cd\u4f5c\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087663\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : DoodleSit <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5355\u6761\u8bed\u53e5\u53ef\u4ee5\u7701\u7565\u82b1\u62ec\u53f7~                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087664\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : Mitt <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6211\u89c9\u5f97\u82b1\u62ec\u53f7\u8fd9\u4e1c\u897f\u80fd\u4e0d\u7701\u5c31\u4e0d\u7701\uff0c\u6709\u65f6\u5019\u4e32\u884c\u90fd\u4e0d\u4f1a\u53d1\u73b0\uff0c\u8981\u7701\u5c31\u8981\u7701 else\uff0c\u51cf\u5c11\u7f29\u8fdb\u624d\u662f\u771f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087665\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : gakkiismywife1 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u6837\u662f\u53ef\u4ee5\u7684 \u6211\u8bb0\u5f97\u9e1f\u54e5\u7684\u535a\u5ba2\u8bf4\u8fc7\u8fd9\u4e2a\u5199\u6cd5                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087666\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : xxbutoo <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @gakkiismywife1 \u54ce\u5440 \u522b\u62c6\u7a7f\u6211\u561b                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087667\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : dobelee <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6ca1\u4ec0\u4e48\u7279\u522b\u3002\u5c31\u662f\u683c\u5f0f\u4e0d\u592a\u89c4\u8303\u3002\u800c\u5df2\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087668\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ben1024 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             else foreach \u4e0d\u6362\u884c\u5389\u5bb3\u7684<br \/>\u4e3a\u4e86\u7701\u5b57\u7b26\u800c\u7701\u5b57\u7b26                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087669\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : rocky114 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u6837\u5199\u7684\u6253\u6b7b                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087670\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : asdf2020 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6ca1\u6709\uff0c\u8fd9\u6837\u771f\u5bb9\u6613\u88ab\u6253                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087671\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : VANHOR <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6ca1\u8fd9\u4e48\u5199\u8fc7\uff0c\u4e0d\u8fc7\u5c45\u7136\u8fd8\u80fd\u8fd9\u4e48\u5199\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087672\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : goodboy95 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             if else for\uff0c\u6211\u4ee5\u524d\u7ecf\u5e38\u60f3\u8fd9\u4e48\u5199\uff0c\u4e0d\u8fc7\u8003\u8651\u5230\u5c0f\u547d\u8fd8\u662f\u6ca1\u6562                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087673\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lepig <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4e0d\u597d\u610f\u601d\uff0c\u4ece\u6ca1\u5199\u8fc7\u3002<\/p>\n<p>\u5982\u679c\u6211\u7684\u540c\u4e8b\u8fd9\u6837\u5199\uff0c\u6211\u53ef\u80fd\u4f1a\u7a0d\u5fae\u603c\u4ed6\u4e00\u4e0b\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087674\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : svipchao <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             https:\/\/www.laruence.com\/2020\/07\/09\/6015.html<br \/>\u4eca\u5929\u521a\u770b\u5230\u7684\uff0c\u7136\u540e\u5728 v2 \u53c8\u770b\u5230\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087675\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : akira <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u770b\u8d77\u6765\u4e5f\u6ca1\u5565\u95ee\u9898\uff0c\u4e0d\u8fc7\u5f88\u5c11\u8fd9\u6837\u5199                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087676\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : RickyC <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             if ($a)<br \/> foreach ($a as $v)<br \/> echo $v;<br \/>else<br \/> echo &#8220;array is empty&#8221;;<br \/>&#8212;&#8212;<br \/>\u5982\u679c\u662f\u6211\u53ef\u80fd\u4f1a\u8fd9\u4e48\u5199, \u6b22\u8fce\u6307\u6b63.                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087677\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : RickyC <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @ben1024 \u80fd\u7701\u5fc5\u7701\u662f\u539f\u5219; \u4f46\u5fc5\u8981\u7684\u6ce8\u91ca\u4e0d\u80fd\u7701; \u80fd\u8bf4 1 \u4e2a\u5b57\u4e0d\u8bf4 2 \u4e2a\u5b57                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087678\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : HackerJax <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u76f4\u63a5 foreach \u5c31\u5b8c\u4e8b\u4e86\uff0c\u53ea\u8981\u662f\u6570\u7ec4\u5c31\u884c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087679\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : cszchen <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u7b2c\u4e00\u6b21\u77e5\u9053\u8fd9\u79cd\u5199\u6cd5\uff0c\u4e0d\u63a8\u8350\uff0c\u53ef\u4ee5\u8f9e\u9000\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087680\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : shanghai1998 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5f00\u6389\uff0c\u592a\u9a9a\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087681\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : RickyC <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @cszchen \u4e3a\u4ec0\u4e48\u4e0d\u63a8\u8350, \u5982\u679c\u8fd9\u6837\u5199\u6027\u80fd\u66f4\u597d\u5462?                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087682\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : newtype0092 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @RickyC \u8fd9\u79cd\u5b8c\u5168\u662f\u964b\u4e60\uff0c\u4e0e\u6027\u80fd\u65e0\u5173\u3002\u9664\u975e\u662f\u673a\u5668\u81ea\u52a8\u751f\u6210\uff0c\u4eba\u5de5\u5199\u8fd9\u79cd\u4ee3\u7801\u6781\u5927\u7684\u63d0\u9ad8\u4e86\u7ef4\u62a4\u65f6\u7684\u51fa\u9519\u6982\u7387\uff0c\u7eaf\u5c5e\u7ed9\u81ea\u5df1\u548c\u540c\u4e8b\u627e\u9ebb\u70e6\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087683\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : sorshion <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u7b2c\u4e8c\u6b21\u542c\u8bf4\u8fd9\u79cd\u8bed\u6cd5\uff0c\u8fd8\u662f\u9e1f\u54e5\uff0c\u535a\u5ba2\u4ecb\u7ecd\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087684\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : cszchen <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @RickyC \u7528\u7684\u8fd8\u662f if else + foreach \u5faa\u73af\uff0c\u600e\u4e48\u4f1a\u6027\u80fd\u66f4\u597d<br \/>\u9000\u4e00\u4e07\u6b65\u8bb2\uff0c\u5c31\u7b97\u6027\u80fd\u66f4\u597d\uff0c\u8fd9\u4e48\u4e0d\u89c4\u8303\u4e5f\u662f\u5f97\u4e0d\u507f\u5931<br \/>\u7528 PHP \u6765\u5f00\u53d1\uff0c\u662f\u56e0\u4e3a\u6027\u80fd\u4e0d\u662f\u74f6\u9888                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087685\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : fengh0409 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4e0d\u9700\u8981\u5224\u65ad\uff0c\u76f4\u63a5 foreach \u5b8c\u4e8b                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087686\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : maigebaoer <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u9e1f\u54e5\u535a\u5ba2\u6709\u89c1\u8fc7                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087687\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : hexiaolu <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u662f\u6709\u8fd9\u6837\u7684\u5199\u6cd5\uff0c\u53ea\u662f\u4e0d\u4f1a\u8fd9\u6837\u5199\uff0c\u4e0d\u8fc7 100 \u4e2a phper 100 \u79cd\u89c4\u8303\uff0c\u5199\u4ee3\u7801\u5f00\u5fc3\u5c31\u597d\uff01\uff01\uff01                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087688\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ditel <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u81ea\u52a8\u751f\u6210\u6ca1\u95ee\u9898\uff0c\u5199\u7684\u5c31\u62d6\u51fa\u53bb\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087689\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : elintwenty <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u52a8\u6001\u8bed\u8a00 + \u5947\u6280\u6deb\u5de7 + \u671b\u6587\u751f\u4e49 \u7ef4\u62a4\u590d\u6742\u5ea6\u6307\u6570\u7ea7\u589e\u52a0\uff0c\u5728\u5de5\u7a0b\u91cc\u8fd9\u4e48\u5199\u7684\u4eba\u5df2\u7ecf\u90fd\u88ab\u6253\u6b7b\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087690\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lovecy <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             if (!empty($a)) {<br \/>&#8230;.foreach($a as $k =&gt; $v) {<br \/>&#8230;&#8230;..echo $v;<br \/>&#8230;.}<br \/>} else {<br \/>&#8230;.echo &#8220;array is empty&#8221;;<br \/>}<br \/>\u6ce8\uff1a&#8230;.\u4ee3\u8868\u7f29\u8fdb<\/p>\n<p>\u8fd9\u4e48\u5199\u662f\u6700\u5b8c\u7f8e\u7684\uff0c\u61c2\u5f97\u90fd\u61c2\uff01<br \/>\u597d\u5427\uff0c\u5176\u5b9e\u5c31\u662f\u9632\u6b62$a \u4e3a undefined \u6216\u8005 null\uff0c\u62a5 NOTICE \u6216 WARNING \u9519\u8bef                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087691\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lovecy <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @RickyC \u6ca1\u6709\u6027\u80fd\u63d0\u5347\u53ef\u8a00\uff0c\u800c\u4e14\u540e\u671f\u7ef4\u62a4\u7684\u65f6\u5019\uff0c\u4e00\u65e6\u6ca1\u6ce8\u610f\u5230\u8fd9\u91cc\u6ca1\u6709\u82b1\u62ec\u53f7\uff0c\u76f4\u63a5\u540e\u9762\u52a0\u4e86\u4ee3\u7801\uff0c\u5c31\u51fa\u9519\u4e86\u3002<br \/>\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027\u6bd4\u7701\u90a3\u51e0\u4e2a\u5b57\u7b26\u91cd\u8981\u591a\u4e86\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087692\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : dvaknheo <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6211\u4f1a\u8fd9\u4e48\u5199\uff1a<br \/>$a=is_array($a)?$a:[];<br \/>foreach($a as $k =&gt; $v) {<br \/> \/\/<br \/>}<br \/>\u597d\u5904\u662f\u5c11\u4e00\u5c42\u7f29\u8fdb\uff0c\u770b\u8d77\u6765\u8212\u670d\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087693\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : xxbutoo <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @elintwenty \u4e3a\u4ec0\u4e48\u554a\u4e3a\u4ec0\u4e48\u554a\u4e3a\u4ec0\u4e48\u554a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087694\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : weitch <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @lovecy #35<br \/>php \u90fd\u662f\u76f4\u63a5 foreach\uff0c\u6839\u672c\u4e0d\u9700\u8981\u5224\u65ad\u662f\u5426\u5b9a\u4e49\u4e86\u6ca1\uff0c\u5199\u8d77\u6765\u500d\u513f\u723d\u3002<br \/>\u6bcf\u6b21\u770b\u5230 js \u7684\u5404\u79cd undefined \u5c31\u5934\u75bc\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087695\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : wdring <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @weitch \u7a7a\u6570\u7ec4\u4f1a\u62a5\u9519                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087696\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lovecy <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @weitch \u597d\u7684\u4e60\u60ef\u662f\uff0c\u4f7f\u7528\u53d8\u91cf\u524d\u5c3d\u91cf\u5224\u65ad\uff08\u5b58\u5728\u3001\u503c\u3001\u7c7b\u578b\uff09\uff0c\u7136\u540e\u521d\u59cb\u5316\u4e00\u4e0b\uff0c\u4e0d\u7136\u4f1a\u6709\u5f88\u591a NOTICE \u6216\u8005 WARNING \u62a5\u9519\uff0c\u751a\u81f3\u53ef\u80fd\u56e0\u4e3a\u5176\u4ed6\u5730\u65b9\u6539\u52a8\uff0c\u4f20\u8f93\u4e86\u5947\u602a\u7684\u6570\u636e\u4ea7\u751f\u5947\u602a\u7684 BUG                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4087697\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : weitch <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @wdring #40<br \/>@lovecy #50<br \/>\u53ea\u8981\u4e0d\u62a5 error \u5c31\u884c\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u60f3\u95ee\u4e0b\uff0c PHP \u7684\u9879\u76ee\u4e2d\uff0c\u6709\u6ca1\u6709&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187829"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=187829"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187829\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=187829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=187829"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=187829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}