{"id":30552,"date":"2023-08-11T08:49:09","date_gmt":"2023-09-07T20:05:10","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%ad%a6%e4%b9%a0php7%e7%b3%bb%e5%b9%b6%e5%9b%9e%e5%bf%86%e8%b5%b7php%ef%bc%88%e7%bb%99%e8%87%aa%e5%b7%b1%e7%9a%84%e6%8f%90%e9%86%92%ef%bc%89\/"},"modified":"2025-08-12T19:44:15","modified_gmt":"2025-08-12T11:44:15","slug":"%e5%ad%a6%e4%b9%a0php7%e7%b3%bb%e5%b9%b6%e5%9b%9e%e5%bf%86%e8%b5%b7php%ef%bc%88%e7%bb%99%e8%87%aa%e5%b7%b1%e7%9a%84%e6%8f%90%e9%86%92%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%ad%a6%e4%b9%a0php7%e7%b3%bb%e5%b9%b6%e5%9b%9e%e5%bf%86%e8%b5%b7php%ef%bc%88%e7%bb%99%e8%87%aa%e5%b7%b1%e7%9a%84%e6%8f%90%e9%86%92%ef%bc%89\/","title":{"rendered":"\u5b66\u4e60PHP7\u7cfb\u5e76\u56de\u5fc6\u8d77PHP\uff08\u7ed9\u81ea\u5df1\u7684\u63d0\u9192\uff09"},"content":{"rendered":"<h1>\u7b80\u8ff0<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PHP7\u306e\u65b0\u6a5f\u80fd\u306e\u78ba\u8a8d<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3092\u4eca\u66f4\u3057\u3064\u3064PHP\u306e\u304a\u3055\u3089\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3092\u3057\u30667\u7cfb\u306b\u79fb\u884c\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/ul>\n<h1>\u8bf7\u63d0\u4f9b\u66f4\u591a\u80cc\u666f\u4fe1\u606f\u4ee5\u4fbf\u6211\u66f4\u597d\u5730\u7406\u89e3\u4f60\u7684\u8981\u6c42\u3002PHP\u4e2d\u7ea7\u8005\u7684\u76ee\u6807\u2014\u638c\u63e1\u8bed\u8a00\u7684\u4e66\u7c4d<br \/>\nPHP: \u4ecePHP 5.6.x\u8fc1\u79fb\u5230 PHP 7.0.x<br \/>\nPHP: \u4ecePHP 7.0.x\u8fc1\u79fb\u5230 PHP 7.1.x<br \/>\nPHP: \u4ecePHP 7.1.x\u8fc1\u79fb\u5230 PHP 7.2.x<br \/>\n\u9009\u53d6PHP\u7248\u672c\u53d8\u5316\u7684\u8981\u70b9(\u4ece5.4.x\u52307.3.x)<\/p>\n<h1>\u524d\u63d0 t\u00ed)<\/p>\n<ul class=\"post-ul\">PHP7.2<\/ul>\n<h1>\u6ce8\u610f\u4e8b\u9879\u6211\u4e2a\u4eba\u7ecf\u8fc7\u91cd\u65b0\u5ba1\u89c6\u540e\uff0c\u628a\u6211\u8bb0\u4f4f\u7684\u4ee5PHP7\u7cfb\u5217\u65b0\u589e\u7684\u529f\u80fd\u4e3a\u91cd\u70b9\u7684\u90e8\u5206\u5199\u4e86\u4e0b\u6765\u3002<\/p>\n<h1>\u58f0\u660ePHP7\u53d1\u5e03\u540e\uff0c\u652f\u6301\u4e86\u5b57\u7b26\u4e32\u7c7b\u578b\u3001\u6574\u6570\u7c7b\u578b\u4ee5\u53ca\u5176\u4ed6\u591a\u79cd\u6807\u91cf\u7c7b\u578b\u3002\u53ef\u4ee5\u8bf4\uff0c\u8fd9\u6709\u70b9\u50cf\u7c7b\u578b\u63d0\u793a\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u79cd\u7c7b\u578b\u58f0\u660e\u4ecd\u4e0d\u5b8c\u5168\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">echo<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"1\"<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"hoge\"<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ Argument 1 passed to sampleIntFunc() must be of the type integer, string given<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u867d\u7136\u5b57\u7b26\u4e32\u5df2\u7ecf\u7834\u88c2\uff0c\u4f46\u4ecd\u7136\u81ea\u52a8\u8fdb\u884c\u4e86\u8f6c\u6362\u5e76\u63a5\u53d7\u4e86\u5176\u5b83\u7ed3\u679c\u3002\u8fd9\u4e2a\u7c7b\u578b\u58f0\u660e\u6709\u70b9\u5f31\u3002PHP7\u5f15\u5165\u7684\u7c7b\u578b\u58f0\u660e\u53ef\u4ee5\u5c06\u5176\u53d8\u5f97\u66f4\u52a0\u5f3a\u5927\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">declare<\/span><span class=\"p\">(<\/span><span class=\"n\">strict_types<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ Uncaught TypeError: Argument 1 passed to sampleFunc() must be of the type integer, boolean given<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"1\"<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ Uncaught TypeError: Argument 1 passed to sampleFunc() must be of the type integer, string given<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"hoge\"<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ Uncaught TypeError: Argument 1 passed to sampleFunc() must be of the type integer, string given<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u5728\u6587\u4ef6\u7684\u5f00\u5934\u6dfb\u52a0declare(strict_types=1);\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4e25\u683c\u7684\u7c7b\u578b\u58f0\u660e\u3002<br \/>\n\u6709\u5173declare\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605PHP: declare &#8211; Manual\u3002<\/p>\n<p>\u5982\u679c\u60f3\u8981\u5141\u8bb8NULL\uff0c\u53ef\u4ee5\u5728\u578b\u7684\u524d\u9762\u6dfb\u52a0?\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">declare<\/span><span class=\"p\">(<\/span><span class=\"n\">strict_types<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">?int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kc\">null<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u30a8\u30e9\u30fc\u306f\u767a\u751f\u3057\u306a\u3044<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u901a\u8fc7\u8fd4\u56de\u503c\u7684\u65b9\u5f0f\u8fdb\u884c\u5b9a\u4e49\uff0c\u5e76\u4e14\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">declare<\/span><span class=\"p\">(<\/span><span class=\"n\">strict_types<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">:<\/span><span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nv\">$num<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 2<\/span>\r\n<\/code><\/pre>\n<p>\u5f53\u7136\uff0c\u53ef\u4ee5\u50cf\u53d8\u91cf\u4e00\u6837\u5141\u8bb8NULL\uff08\u4f20\u8fbe\u8fd4\u56de\u503c\u53ef\u80fd\u4e3aNULL\u7684\u4fe1\u606f\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">declare<\/span><span class=\"p\">(<\/span><span class=\"n\">strict_types<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">:<\/span><span class=\"kt\">?int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nv\">$num<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u82e5\u8981\u660e\u786e\u786e\u4fdd\u6ca1\u6709\u8fd4\u56de\u503c\u65f6\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">declare<\/span><span class=\"p\">(<\/span><span class=\"n\">strict_types<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">)<\/span> <span class=\"p\">:<\/span><span class=\"kt\">void<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<\/code><\/pre>\n<h1>\u8fd0\u7b97\u7b26<\/p>\n<h2>\u7a7a\u5408\u5e76\u8fd0\u7b97\u7b26\uff08??\uff09\u5f53\u7ed9\u672a\u5b9a\u4e49\u7684\u53d8\u91cf\u8d4b\u4e88\u521d\u59cb\u503c\u65f6\uff0c\u8bf7\u5199\u4e0a\u201c\u7528\u4e8e\u6b64\u76ee\u7684\u201d\uff0c\u8fd9\u6837\u8bf4\u4e0d\u592a\u6e05\u695a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"k\">isset<\/span><span class=\"p\">(<\/span><span class=\"nv\">$piyo<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$piyo<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"k\">isset<\/span><span class=\"p\">(<\/span><span class=\"nv\">$piyo<\/span><span class=\"p\">)<\/span><span class=\"o\">?<\/span> <span class=\"nv\">$piyo<\/span><span class=\"o\">:<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$piyo<\/span> <span class=\"o\">??<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a3\u6bb5\u4ee3\u7801\u76f8\u7b49\u3002\u867d\u7136&#8221;NULL\u5408\u5e76\u8fd0\u7b97\u7b26&#8221;\u8fd9\u4e2a\u540d\u5b57\u6709\u70b9\u96be\u8bb0\uff0c\u4f46\u5982\u679c\u80fd\u8bfb\u61c2\u4ee3\u7801\u7684\u8bdd\u5e94\u8be5\u5f88\u65b9\u4fbf\u3002<\/p>\n<h2>\u5192\u53f7:\u5c55\u793a\u4e86Elvis\u64cd\u4f5c\u7b26:<br \/>\n\u5bf9\u4e8eElvis\uff0c\u6211\u89c9\u5f97\u6709\u70b9\u50cf\u3002Elvis\u64cd\u4f5c\u7b26\u662f\u5728PHP5.3\u4e2d\u6dfb\u52a0\u7684\u4e00\u4e2a\u64cd\u4f5c\u7b26\u3002\u6211\u4ee5\u524d\u4ece\u672a\u4f7f\u7528\u8fc7\u5b83\u3002<br \/>\n\u5982\u679cNULL\u8054\u5408\u64cd\u4f5c\u7b26\u7b49\u4e8eisset\uff0c\u90a3\u4e48Elvis\u64cd\u4f5c\u7b26\u5c06\u7b49\u540c\u4e8eif($hoge)\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nv\">$piyo<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$piyo<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$piyo<\/span><span class=\"o\">?<\/span> <span class=\"nv\">$piyo<\/span><span class=\"o\">:<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$hoge<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$piyo<\/span> <span class=\"o\">?:<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$hoge<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u63d0\u5230\u7684\u4e09\u4e2a\u4ee3\u7801\u662f\u7b49\u4ef7\u7684\u3002\u7531\u4e8eElvis\u64cd\u4f5c\u7b26\u7684\u540d\u5b57\u5f88\u6709\u5a01\u529b\uff0c\u6240\u4ee5\u5f88\u5bb9\u6613\u8bb0\u4f4f\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8e\u5b83\u5728if\u8bed\u53e5\u4e2d\u5224\u65ad\uff0c\u6240\u4ee5\u5728\u884c\u4e3a\u65b9\u9762\u9700\u8981\u7a0d\u52a0\u6ce8\u610f\u3002<\/p>\n<h2>\u592a\u7a7a\u8239\u8ba1\u7b97\u7b26\u8fd9\u4e2a&#8230;\u540d\u5b57\u4e0d\u592a\u9177\uff08\u4e2a\u4eba\u89c2\u70b9\uff09\u3002NULL\u5408\u5e76\u8fd0\u7b97\u7b26\u66f4\u9177\u4e00\u4e9b&#8230;<br \/>\n\u5b87\u5b99\u8239\u8fd0\u7b97\u7b26\u672c\u8eab\u5728\u7f16\u5199compare\u51fd\u6570\u65f6\u7ecf\u5e38\u4f7f\u7528\u3002\u5173\u4e8e\u5b87\u5b99\u8239\u8fd0\u7b97\u7b26\u7684\u89e3\u91ca\uff0cPHP\u5b98\u65b9\u624b\u518c\u975e\u5e38\u6613\u61c2\u3002<\/p>\n<blockquote><p>\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u662f\u7528\u6765\u6bd4\u8f83\u4e24\u4e2a\u8868\u8fbe\u5f0f\u7684\u3002 \u5982\u679c$a\u5927\u4e8e$b\uff0c\u5219\u8fd4\u56de1\uff1b\u5982\u679c$a\u7b49\u4e8e$b\uff0c\u5219\u8fd4\u56de0\uff1b\u5982\u679c$a\u5c0f\u4e8e$b\uff0c\u5219\u8fd4\u56de-1\u3002 \u5728\u6bd4\u8f83\u8fc7\u7a0b\u4e2d\uff0c\u4f7f\u7528PHP\u7c7b\u578b\u6bd4\u8f83\u89c4\u5219\u7684\u6bd4\u8f83\u8868\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u6574\u6570\u5024<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">1<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 0<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">1<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ -1<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u5024<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mf\">1.5<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mf\">1.5<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 0<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mf\">1.5<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mf\">2.5<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ -1<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mf\">2.5<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"mf\">1.5<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u6587\u5b57\u5217<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"a\"<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"s2\">\"a\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 0<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"a\"<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"s2\">\"b\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ -1<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"b\"<\/span> <span class=\"o\">&lt;=&gt;<\/span> <span class=\"s2\">\"a\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 1<\/span>\r\n<\/code><\/pre>\n<h1>\u8fd9\u4e2a\u5e38\u6570\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4<br \/>\n\u90a3\u4e2a\uff1f\u6211\u8bb0\u5f97\u4ee5\u524d\u76845\u7cfb\u4e0d\u80fd\u505a\u5230\u5427\u3002\u53ef\u80fd\u53ea\u662f\u56e0\u4e3a\u6ca1\u7528\u8fc7\u800c\u5df2\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">define<\/span><span class=\"p\">(<\/span><span class=\"s1\">'HOGE'<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s1\">'foo'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'bar'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s1\">'key'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'value'<\/span>\r\n<span class=\"p\">]);<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"no\">HOGE<\/span><span class=\"p\">[<\/span><span class=\"s1\">'foo'<\/span><span class=\"p\">];<\/span> <span class=\"c1\">\/\/ bar<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u6307\u8fd9\u6837\u7684\u4e8b\u60c5\uff0c\u5bf9\u5417\uff1f<\/p>\n<h1>\u5728\u7c7b\u5185\u90e8\u7684\u5e38\u91cf\u8bbf\u95ee\u6743\u9650\u73b0\u5728\u53ef\u4ee5\u5b9a\u4e49\u8bbf\u95ee\u8bfe\u5802\u5185\u5b9a\u4e49\u7684\u5e38\u91cf\u7684\u8bbf\u95ee\u6743\u9650\u3002\u6211\u89c9\u5f97\u8fd9\u4e2a\u529f\u80fd\u53ef\u80fd\u4f1a\u6709\u6240\u7528\u5904\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">sampleClass<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">public<\/span> <span class=\"k\">const<\/span> <span class=\"no\">HOGE<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n        <span class=\"s1\">'foo'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'bar'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s1\">'key'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'value'<\/span>\r\n    <span class=\"p\">];<\/span>\r\n    <span class=\"k\">private<\/span> <span class=\"k\">const<\/span> <span class=\"no\">PIYO<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n        <span class=\"s1\">'foo'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'bar'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s1\">'key'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'value'<\/span>\r\n    <span class=\"p\">];<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"n\">sampleClass<\/span><span class=\"o\">::<\/span><span class=\"no\">HOGE<\/span><span class=\"p\">[<\/span><span class=\"s1\">'key'<\/span><span class=\"p\">];<\/span> <span class=\"c1\">\/\/ value<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"n\">sampleClass<\/span><span class=\"o\">::<\/span><span class=\"no\">PIYO<\/span><span class=\"p\">[<\/span><span class=\"s1\">'foo'<\/span><span class=\"p\">];<\/span> <span class=\"c1\">\/\/ Fatal error: Uncaught Error: Cannot access private const sampleClass::PIYO<\/span>\r\n<\/code><\/pre>\n<h1>\u533f\u540d\u7c7b\u8fd9\u4e0d\u662f\u533f\u540d\u51fd\u6570\uff0c\u800c\u662f\u533f\u540d\u7c7b\u3002\u5b83\u53ef\u4ee5\u50cf\u533f\u540d\u51fd\u6570\u4e00\u6837\u4f7f\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">iHoge<\/span> <span class=\"nv\">$obj<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$obj<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">pubFunc<\/span><span class=\"p\">(<\/span><span class=\"s1\">'hoge'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ foo<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$obj<\/span><span class=\"o\">::<\/span><span class=\"no\">HOGE<\/span><span class=\"p\">[<\/span><span class=\"s1\">'foo'<\/span><span class=\"p\">];<\/span> <span class=\"c1\">\/\/ bar<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kd\">interface<\/span> <span class=\"nc\">iHoge<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">pubFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">string<\/span> <span class=\"nv\">$param1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"k\">new<\/span> <span class=\"kd\">class<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">iHoge<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">public<\/span> <span class=\"k\">const<\/span> <span class=\"no\">HOGE<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n        <span class=\"s1\">'foo'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'bar'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s1\">'key'<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"s1\">'value'<\/span>\r\n    <span class=\"p\">];<\/span>\r\n    <span class=\"k\">public<\/span> <span class=\"k\">function<\/span> <span class=\"n\">pubFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">string<\/span> <span class=\"nv\">$param1<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">echo<\/span> <span class=\"nv\">$param1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<p>\u7528\u7b80\u5355\u660e\u4e86\u7684\u65b9\u5f0f\u6765\u5199\u7684\u8bdd\uff0c\u53ef\u80fd\u662f\u8fd9\u6837\u7684\u5427\u3002\u611f\u89c9\u5728\u7f16\u5199\u6d4b\u8bd5\u7528\u4f8b\u7684\u65f6\u5019\u4f1a\u7ecf\u5e38\u4f7f\u7528\u5230\u8fd9\u4e2a\u5370\u8c61\u5462\u3002\u867d\u7136\u4e0d\u662f\u5f88\u786e\u5b9a\u3002<\/p>\n<h1>\u65ad\u8a00<br \/>\n\u6211\u89c9\u5f97\u8fd9\u4e2a\u7ed3\u6784\u4ece\u4ee5\u524d\u5c31\u5b58\u5728\u4e86\uff0c\u4f46\u542c\u8bf4\u57287\u7cfb\u4e2d\u66f4\u5bb9\u6613\u5904\u7406\uff0c\u6240\u4ee5\u6211\u60f3\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">define<\/span><span class=\"p\">(<\/span><span class=\"s1\">'TAX'<\/span><span class=\"p\">,<\/span> <span class=\"mf\">1.08<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"k\">function<\/span> <span class=\"n\">tax<\/span><span class=\"p\">(<\/span><span class=\"nv\">$v1<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nv\">$v1<\/span> <span class=\"o\">*<\/span> <span class=\"no\">TAX<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nv\">$price<\/span> <span class=\"o\">=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1000<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nb\">assert<\/span><span class=\"p\">(<\/span><span class=\"nv\">$price<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"price\u5024\u304c0\u672a\u6e80\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nb\">assert<\/span><span class=\"p\">(<\/span><span class=\"nf\">tax<\/span><span class=\"p\">(<\/span><span class=\"mi\">1000<\/span><span class=\"p\">)<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1050<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"tax\u8a08\u7b97\u304c\u7570\u5e38\"<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u6709\u70b9\u6742\u4e71\uff0c\u4f46\u662f\u5e94\u8be5\u662f\u8fd9\u4e2a\u611f\u89c9\u5427\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u5f53\u201cTAX\u201d\u7684\u503c\u6539\u53d8\u65f6\uff0c\u5982\u679c\u63d2\u5165assert\u8bed\u53e5\uff0c\u5c31\u53ef\u4ee5\u6ce8\u610f\u5230\u201c\u4e0d\u5e94\u8be5\u662f1080\uff0c\u56e0\u6b64\u53d1\u751f\u4e86\u67d0\u79cd\u672a\u9884\u6599\u7684\u5f02\u5e38\u201d\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ea\u7528\u4e8e\u5f02\u5e38\u68c0\u6d4b\uff0c\u6240\u4ee5\u5728assert\u8bed\u53e5\u5185\u4e0d\u5e94\u8be5\u53d1\u751f\u526f\u4f5c\u7528\u3002<br \/>\n\u5f53assertion\uff08assert\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\uff09\u4e3a\u201cfalse\u201d\u65f6\uff0cdescription\uff08assert\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff09\u5c06\u88ab\u8f93\u51fa\uff0c\u6240\u4ee5\u5bf9\u4e8e\u4e0d\u719f\u6089\u7684\u4eba\u53ef\u80fd\u4f1a\u611f\u5230\u56f0\u60d1\u3002\u8003\u8651\u5230\u68c0\u6d4b\u5f02\u5e38\uff0c\u53ef\u4ee5\u5c06\u6b63\u5e38\u60c5\u51b5\u5199\u5728assertion\u4e2d\uff0c\u5c06\u201c\u56e0\u4e3a\u6b63\u5e38\u60c5\u51b5\u6ca1\u6709\u901a\u8fc7\u6240\u4ee5\u5f02\u5e38\u201d\u5199\u5728description\u4e2d\uff0c\u8fd9\u6837\u8bb0\u4f4f\u4f1a\u66f4\u597d\u3002assert\u53ea\u662f\u7528\u4e8e\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u5c3d\u65e9\u53d1\u73b0\u9519\u8bef\u548c\u9000\u5316\u7684\u5de5\u5177\uff0c\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u9a8c\u8bc1\u6216\u503c\u7684\u5408\u6cd5\u6027\uff0c\u4e5f\u4e0d\u80fd\u5fd8\u8bb0\u8fd9\u4e00\u70b9\u3002<br \/>\n\u867d\u7136assert\u5f88\u65b9\u4fbf\uff0c\u4f46\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u4e5f\u53ef\u80fd\u5f71\u54cd\u6027\u80fd\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528assert\u6307\u4ee4\uff08zend.assertions\uff09\u6765\u8bbe\u7f6e\u3002<br \/>\n\u597d\u50cf\u5199\u4e00\u70b9\u5c31\u597d\u3002<\/p>\n<h1>\u6700\u540e\u4e0d\u77e5\u4e0d\u89c9\u95f4\uff0c\u53d1\u73b0\u81ea\u5df1\u5df2\u7ecf\u8fbe\u5230\u4e867.3\u7248\u672c\uff0c\u800c\u6ca1\u6709\u8d76\u4e0a7\u7cfb\u5217\u3002\u6211\u8ba1\u5212\u9010\u6e10\u8d76\u4e0a\u5e76\u7f16\u5199\u4ee3\u7801\u6765\u63d0\u5347\u81ea\u5df1\u7684\u6c34\u5e73\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u8ff0 PHP7\u306e\u65b0\u6a5f\u80fd\u306e\u78ba\u8a8d &nbsp; \u3092\u4eca\u66f4\u3057\u3064\u3064PHP\u306e\u304a\u3055\u3089\u3044 &nbsp; \u3092\u3057\u30667\u7cfb\u306b\u79fb\u884c\u3067\u304d\u308b [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30552","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5b66\u4e60PHP7\u7cfb\u5e76\u56de\u5fc6\u8d77PHP\uff08\u7ed9\u81ea\u5df1\u7684\u63d0\u9192\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5b66\u4e60PHP7\u7cfb\u5e76\u56de\u5fc6\u8d77PHP\uff08\u7ed9\u81ea\u5df1\u7684\u63d0\u9192\uff09\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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