{"id":98,"date":"2020-11-12T15:22:35","date_gmt":"2020-11-12T07:22:35","guid":{"rendered":"http:\/\/9iwd.top\/?p=98"},"modified":"2020-11-12T15:22:35","modified_gmt":"2020-11-12T07:22:35","slug":"no-25-%e4%ba%86%e8%a7%a3%e6%95%b0%e7%bb%84%e4%bb%a5%e5%8f%8a%e5%8e%86%e9%81%8d%e6%95%b0%e7%bb%84%e5%86%85%e5%ae%b9","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=98","title":{"rendered":"No.25 \u4e86\u89e3\u6570\u7ec4\u4ee5\u53ca\u5386\u904d\u6570\u7ec4\u5185\u5bb9"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>\t#\u6570\u7ec4\u7684\u6982\u5ff5\n\/*\n\u6570\u7ec4: array\uff0c\u6570\u636e\u7684\u7ec4\u5408\uff0c\u6307\u5c06\u4e00\u7ec4\u6570\u636e\uff08\u591a\u4e2a\uff09\u5b58\u50a8\u5230\u4e00\u4e2a\u6307\u5b9a\u7684\u5bb9\u5668\u4e2d\uff0c\u7528\u53d8\u91cf\u6307\u5411\u8be5\u5bb9\u5668,\u7136\u540e\u53ef\u4ee5\u901a\u8fc7\u53d8\u91cf\u4e00\u6b21\u6027\u5f97\u5230\u8be5\u5bb9\u5668\u4e2d\u7684\u6240\u6709\u6570\u636e\u3002\n#\u6570\u7ec4\u5b9a\u4e49\u8bed\u6cd5\n\u5728PHP\u4e2d\u7cfb\u7edf\u63d0\u4f9b\u591a\u79cd\u5b9a\u4e49\u6570\u7ec4\u7684\u65b9\u5f0f:\n1\u3001\u4f7f\u7528array\u5173\u952e\u5b57:\u6700\u5e38\u7528\u7684$\u53d8\u91cf= array(\u5143\u7d201,\u5143\u7d202,\u5143\u7d203..);\n2\u3001\u53ef\u4ee5\u4f7f\u7528\u4e2d\u62ec\u53f7\u6765\u5305\u88f9\u6570\u636e:v$\u53d8\u91cf=&#91;\u5143\u7d201,\u5143\u7d202..];\n3\u3001\u9690\u5f62\u5b9a\u4e49\u6570\u7ec4:\u7ed9\u53d8\u91cf\u589e\u52a0\u4e00\u4e2a\u4e2d\u62ec\u53f7\uff0c\u7cfb\u7edf\u81ea\u52a8\u53d8\u6210\u6570\u7ec4\n$\u53d8\u91cf&#91;]=\u503c1;\/\/\u5982\u679c\u4e0d\u63d0\u4f9b\u4e0b\u6807\u4e5f\u53ef\u4ee5\uff0c\u7cfb\u7edf\u81ea\u52a8\u751f\u6210(\u6570\u5b57:\u4eceo\u5f00\u59cb)\n$\u53d8\u91cf&#91;\u4e0b\u6807]= \u503c;\/\/\u4e2d\u62ec\u53f7\u91cc\u9762\u7684\u5185\u5bb9\u79f0\u4e4b\u4e3a\u4e0b\u6807 key\uff0c\u8be5\u4e0b\u6807\u53ef\u4ee5\u662f\u5b57\u6bcd\uff08\u5355\u8bcd\u3009\u6216\u8005\u6570\u5b57\uff0c\u4e0e\u53d8\u91cf\u547d\u540d\u7684\u89c4\u5219\u76f8\u4f3c\n*\/\n \n\/\/\u5b9a\u4e49\u6570\u7ec4\uff1aarray\n$a1 = array(1,'2','\u4f60\u597d');\nvar_dump($a1);\n\n\/\/\u5b9a\u4e49\u6570\u7ec4\uff1a&#91;]\n$a2 = &#91;1,'2','\u4f60\u597d'];\nvar_dump($a2);\n\n\/\/\u5b9a\u4e49\u6570\u7ec4\uff1a\u9690\u5f62\n$a3&#91;] = 1;\n$a3&#91;10] = '\u6625\u98ce\u64a9\u4eba';\n$a3&#91;] = '22';\n$a3&#91;'key'] = 1314;\nvar_dump($a3);\n\/\/\u9690\u5f62\u5b9a\u4e49\u6570\u7ec4\uff0c\u6307\u5b9a\u4e0b\u6807\u540e\uff0c\u4e0b\u4e00\u6b21\u81ea\u52a8\u5b9a\u4e49\u5c06\u4ece\u6700\u5927\u4e0b\u6807\u5f00\u59cb\uff0c\u652f\u6301\u5b57\u6bcd\u5b9a\u4e49\u4e0b\u6807\necho '&lt;hr\/>';\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#PHP\u6570\u7ec4\u7279\u70b9\n\/*\n1)\u53ef\u4ee5\u6574\u6570\u4e0b\u6807\u6216\u8005\u5b57\u7b26\u4e32\u4e0b\u6807\n\u5982\u679c\u6570\u7ec4\u4e0b\u6807\u90fd\u4e3a\u6574\u6570:\u7d22\u5f15\u6570\u7ec4\n\u5982\u679c\u6570\u7ec4\u4e0b\u6807\u90fd\u4e3a\u5b57\u7b26\u4e32:\u5173\u8054\u6570\u7ec4\n2)\u4e0d\u540c\u4e0b\u6807\u53ef\u4ee5\u6df7\u5408\u5b58\u5728:\u6df7\u5408\u6570\u7ec4\n3\u3009\u6570\u7ec4\u5143\u7d20\u7684\u987a\u5e8f\u4ee5\u653e\u5165\u987a\u5e8f\u4e3a\u51c6\uff0c\u8ddf\u4e0b\u6807\u65e0\u5173\n4)\u6570\u5b57\u4e0b\u6807\u7684\u81ea\u589e\u957f\u7279\u6027:\u4eceo\u5f00\u59cb\u81ea\u52a8\u589e\u957f\uff0c\u5982\u679c\u4e2d\u95f4\u624b\u52a8\u51fa\u73b0\u8f83\u5927\u7684\uff0c\u90a3\u4e48\u540e\u9762\u7684\u81ea\u589e\u957f\u5143\u7d20\u4ece\u6700\u5927\u7684\u503c+1\u5f00\u59cb\n5)\u7279\u6b8a\u503c\u4e0b\u6807\u7684\u81ea\u52a8\u8f6c\u6362\n\u5e03\u5c14\u503c: true \u548c false\n\u7a7a:NULL\n6)PHP\u4e2d\u6570\u7ec4\u5143\u7d20\u6f2b\u6709\u7c7b\u578b\u9650\u5236\n7)PHP\u4e2d\u6570\u7ec4\u5143\u7d20\u6ca1\u6709\u957f\u5ea6\u9650\u5236\n\u8865\u5145:PHP\u4e2d\u7684\u6570\u7ec4\u662f\u5f88\u5927\u7684\u6570\u636e,\u6240\u4ee5\u5b58\u50a8\u4f4d\u7f6e\u662f\u5806\u533a,\u4e3a\u5f53\u524d\u6570\u7ec4\u5206\u914d\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u3002\n*\/\n$a4&#91;true] = true;\n$a4&#91;false] = false;\n$a4&#91;NULL] = NULL;\nvar_dump($a4);\necho '&lt;hr\/>';\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#\u591a\u7ef4\u6570\u7ec4\n\/\/\u4e8c\u7ef4\u6570\u7ec4\uff1a\u6570\u7ec4\u4e2d\u6240\u6709\u5143\u7d20\u90fd\u662f\u4e00\u7ef4\u6570\u7ec4\n\/\/\u5b9a\u4e49\u4e8c\u7ef4\u6570\u7ec4\uff1a\n$info = array(\n\tarray('name' => '\u5c0f\u660e', 'age' => 30),\n\tarray('name' => '\u5c0f\u8471', 'age' => 28),\n\tarray('name' => '\u5c0f\u7ea2', 'age' => 20)\n\t\/\/\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff0c\u540e\u9762\u53ef\u4ee5\u8ddf\u9017\u53f7\u4e0d\u5f71\u54cd\u4f46\u4e0d\u5efa\u8bae\n);\nprint_r($info);\necho '&lt;hr\/>';\n\n\t#\u591a\u7ef4\u6570\u7ec4\n\/*\n\u5728\u7b2c\u4e8c\u7ef4\u7684\u6570\u7ec4\u5143\u7d20\u4e2d\u53ef\u4ee5\u7ee7\u7eed\u5356\u662f\u6570\u7ec4\uff0c\u5728PHP\u4e2d\u6ca1\u6709\u7ef4\u5ea6\u9650\u5236\uff08PHP\u672c\u8d28\u5e76\u6ca1\u6709\u4e8c\u7ef4\u6570\u7ec4\uff09\n\u4f46\u662f:\u4e0d\u5efa\u8bae\u4f7f\u7528\u8d85\u8fc7\u4e09\u7ef4\u4ee5\u4e0a\u7684\u6570\u7ec4\uff0c\u4f1a\u589e\u52a0\u8bbf\u95ee\u7684\u590d\u6742\u5ea6\uff0c\u964d\u4f4e\u8bbf\u95ee\u6548\u7387\u3002\n\n\t#\u5f02\u5f62\u6570\u7ec4\uff08\u4e0d\u89c4\u5219\u6570\u7ec4\uff09\n\u5f02\u5f62\u6570\u7ec4:\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4e0d\u89c4\u5219,\u6709\u666e\u901a\u57fa\u672c\u53d8\u91cf\u4e5f\u6709\u6570\u7ec4\u3002\n\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5e76\u4e0d\u5e38\u7528\uff0c\u5c3d\u91cf\u8ba9\u6570\u7ec4\u5143\u7d20\u89c4\u5219\u5316\uff08\u4fbf\u4e8e\u8fdb\u884c\u8bbf\u95ee\uff09\n*\/\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#\u6570\u7ec4\u904d\u5386\n\/\/\u6570\u7ec4\u904d\u5386:\u666e\u901a\u6570\u7ec4\u6570\u636e\u7684\u8bbf\u95ee\u90fd\u662f\u901a\u8fc7\u6570\u7ec4\u5143\u7d20\u7684\u4e0b\u6807\u6765\u5b9e\u73b0\u8bbf\u95ee,\u5982\u679c\u8bf4\u6570\u7ec4\u4e2d\u6240\u6709\u7684\u6570\u636e\u90fd\u9700\u8981\u4f9d\u6b21\u8f93\u51fa\u51fa\u6765,\u5c31\u9700\u8981\u6211\u4eec\u4f7f\u7528\u5230\u4e00\u4e9b\u7b80\u5316\u7684\u89c4\u5219\u6765\u5b9e\u73b0\u81ea\u52a8\u83b7\u53d6\u4e0b\u6807\u4ee5\u53ca\u8f93\u51fa\u6570\u7ec4\u5143\u7d20\u3002\n\n$arr = array(0=>array('name'=>'Tom'),1=>array('name'=>'jim'));\t\/\/\u4e8c\u7ef4\u6570\u7ec4\n\/\/\u8bbf\u95ee\u4e00\u7ef4\u5143\u7d20:$arr&#91;\u4e00\u7ef4\u4e0b\u6807]\nprint_r($arr&#91;0]);\t\/\/\u7ed3\u679c:array'name'=>'Tom' )\n\n\/\/\u8bbf\u95ee\u4e8c\u7ef4\u5143\u7d20:$arr&#91;\u4e00\u7ef4\u4e0b\u6807]&#91;\u4e8c\u7ef4\u4e0b\u6807]\necho $arr&#91;1]&#91;'name'];\/\/Jimu\n\/\/\u5728\u8fdb\u884c\u6570\u636e\u5b58\u50a8\u5b9a\u4e49\u7684\u65f6\u5019\uff0c\u901a\u5e38\u4e8c\u7ef4\u6570\u7ec4\u4e0d\u4f1a\u4e24\u4e2a\u7ef4\u5ea6\u7684key\u4e0b\u6807\u90fd\u4e3a\u6570\u5b57\uff0c\u4e00\u822c\u662f\u4e00\u7ef4\u4e3a\u6570\u5b57\uff08\u65e0\u610f\u4e49)\uff0c\u4e8c\u7ef4\u4e3a\u5b57\u7b26\u4e32\uff08\u6570\u636e\u5e93\u8868\u5b57\u6bb5)\uff0c\u6240\u4ee5\u5728\u8fdb\u884c\u904d\u5386\u7684\u65f6\u5019\uff0c\u901a\u5e38\u662f\u53ea\u9700\u8981\u9488\u5bf9\u2500\u7ef4\u8fdb\u884c\u904d\u5386\uff0c\u53d6\u5f97\u4e8c\u7ef4\u6570\u7ec4\u5143\u7d20\uff0c\u7136\u540e\u4e8c\u7ef4\u6570\u7ec4\u5143\u7d20\u901a\u8fc7\u4e0b\u6807\u53bb\u8bbf\u95ee\u3002\necho '&lt;hr\/>';\n\n\/\/\u4e00\u7ef4\u6570\u7ec4\u5386\u904d\nforeach($a3 as $key => $value){\n\t\/\/foreach(\u6570\u7ec4 as &#91;\u4e0b\u6807] => \u503c){} \u4e0b\u6807\u53ef\u4ee5\u7559\u7a7a\n\techo '\u4e0b\u6807\uff1a'.$key.'\uff0c\u503c\uff1a'.$value,'&lt;br\/>';\n}\nunset($key,$value);\t\t\/\/\u5220\u9664\u53d8\u91cf\n\n\/\/\u4e8c\u7ef4\u6570\u7ec4\u5386\u904d\nforeach($info as $value){\n\t\/\/foreach(\u6570\u7ec4 as &#91;\u4e0b\u6807] => \u503c){} \u4e0b\u6807\u53ef\u4ee5\u7559\u7a7a\n\techo 'name\uff1a'.$value&#91;'name'].'\uff0cage\uff1a'.$value&#91;'age'],'&lt;br\/>';\n}\nunset($key,$value);\t\t\/\/\u5220\u9664\u53d8\u91cf\necho '&lt;hr\/>';\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#foreach\u904d\u5386\u539f\u7406\n\/*\nforeach\u904d\u5386\u7684\u539f\u7406:\u672c\u8d28\u662f\u6570\u7ec4\u7684\u5185\u90e8\u6709\u4e00\u9897\u6307\u9488\uff0c\u9ed8\u8ba4\u662f\u6307\u5411\u6570\u7ec4\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0cforeach,\u5c31\u662f\u5229\u7528\u6307\u9488\u53bb\u83b7\u53d6\u6570\u636e\uff0c\u540c\u65f6\u79fb\u52a8\u6307\u9488\u3002\n\nforeach(Sarr as $k => $v){\n\t\/\/\u5faa\u73af\u4f53\n}\n1\u3001foreach.\u4f1a\u91cd\u7f6e\u6307\u9488:\u8ba9\u6307\u9488\u6307\u5411\u7b2c\u4e00\u4e2a\u5143\u7d20\n2\u3001\u8fdb\u5165foreach.\u5faa\u73af:\u901a\u8fc7\u6307\u9488\u53d6\u5f97\u5f53\u524d\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u7136\u540e\u5c06\u4e0b\u6807\u53d6\u51fa\u653e\u5230\u5bf9\u5e94\u7684\u4e0b\u6807\u53d8\u91cfsk\u4e2d\uff08\u5982\u679c\u5b58\u5728)\uff0c\u5c06\u503c\u53d6\u51fa\u6765\u653e\u5230\u5bf9\u5e94\u7684\u503c\u53d8\u91cfsv\u4e2d;\uff08\u6307\u9488\u4e0b\u79fb\u3009\n3\u3001\u8fdb\u5165\u5230\u5faa\u73af\u5185\u90e8(\u5faa\u73af\u4f53)\uff0c\u5f00\u59cb\u6267\u884c\ufe54\n4\u3001\u91cd\u590d2\u548c3\uff0c\u76f4\u5230\u57282\u7684\u65f6\u5019\u9047\u5230\u6307\u9488\u53d6\u4e0d\u5230\u5185\u5bb9\uff08\u6307\u9488\u6307\u5411\u6570\u7ec4\u6700\u540e\u3009\n*\/\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#For\u5faa\u73af\u904d\u5386\u6570\u7ec4\n\/* \nFor\u5faa\u73af:\u57fa\u4e8e\u5df2\u77e5\u8fb9\u754c\u6761\u4ef6\uff08\u8d77\u59cb\u548c\u7ed3\u675f\u3009\u7136\u540e\u6709\u6761\u4ef6\u7684\u53d8\u5316(\u89c4\u5f8b\u3009\u56e0\u6b64: for\u5faa\u73af\u904d\u5386\u6570\u7ec4\u6709\u5bf9\u5e94\u6761\u4ef6\n1\u3001\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6:count(\u6570\u7ec4)\u5f97\u5230\u6570\u7ec4\u5143\u7d20\u7684\u957f\u5ea6\n2\u3001\u8981\u6c42\u6570\u7ec4\u5143\u7d20\u7684\u4e0b\u6807\u662f\u89c4\u5f8b\u7684\u6570\u5b57 *\/\n$arr=array(1,2,3,4,5,6,8,94,33);\nfor($i=0, $len=count($arr); $i &lt; $len; $i++){\n\techo '\u4e0b\u6807\uff1a'.$i.' \u503c\uff1a'.$arr&#91;$i],'&lt;br\/>';\n}\necho '&lt;hr\/>';\n\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\t#while\u5faa\u73af\u5386\u904d\n$arr = array(1,'name'=>'\u5c0f\u660e',3,'age'=>25);\nwhile(list($key,$value) = func_new_each ($arr)){\n\techo '\u4e0b\u6807\uff1a'.$key.' \u503c\uff1a'.$value,'&lt;br\/>';\n}\n\n\/\/\u56e0\u4e3a PHP 7.2\u4e4b\u540e\u7684\u7248\u672c\u5f03\u7528 each \u6240\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u4ee5\u4e0b\u4ee3\u7801\u6765\u81ea\u4e92\u8054\u7f51\nfunction func_new_each(&amp;$array){\n\t$res = array();\n\t$key = key($array);\n\tif($key !== null){\n\t\tnext($array);\n\t\t$res&#91;1] = $res&#91;'value'] = $array&#91;$key];\n\t\t$res&#91;0] = $res&#91;'key'] = $key;\n\t}else{\n\t\t$res = false;\n\t}\n\treturn $res;\n}\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/98"}],"collection":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=98"}],"version-history":[{"count":0,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/98\/revisions"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=98"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=98"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=98"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}