{"id":30277,"date":"2024-01-02T04:31:39","date_gmt":"2023-07-27T07:11:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0\/"},"modified":"2025-08-12T18:25:44","modified_gmt":"2025-08-12T10:25:44","slug":"php%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0\/","title":{"rendered":"PHP\u7b14\u8bb0"},"content":{"rendered":"<pre class=\"post-pre\"><code><span class=\"c1\">###\u5909\u6570\u306e\u5024\u3092\u8868\u793a<\/span>\r\n<span class=\"nb\">var_dump<\/span><span class=\"p\">(<\/span><span class=\"n\">\u5909\u6570<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\">###\u6587\u5b57\u5217\u306e\u4e2d\u306e\u6570\u5b57\u3092\u4f7f\u3063\u305f\u8a08\u7b97<\/span>\r\n<span class=\"nv\">$value<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"2\u4eba\"<\/span><span class=\"o\">+<\/span> <span class=\"s2\">\"3\u4eba\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$value\u306f<\/span><span class=\"err\">\u3010<\/span><span class=\"mi\">5<\/span><span class=\"err\">\u3011<\/span>\r\n\r\n<span class=\"c1\">###\u6587\u5b57\u306e\u30a4\u30f3\u30af\u30fb\u30c7\u30af\u30ea\u30e1\u30f3\u30c8<\/span>\r\n<span class=\"nv\">$str<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"a\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$str<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$str\u306f<\/span><span class=\"err\">\u3010<\/span><span class=\"n\">b<\/span><span class=\"err\">\u3011<\/span>\r\n\r\n<span class=\"c1\">###\u6587\u5b57\u5217\u306e\u7d50\u5408\u3002\u9023\u7d50\u306f\u3010+\u3011\u3067\u306f\u306a\u304f\u3010.\u3011\u3092\u4f7f\u3046<\/span>\r\n<span class=\"nv\">$str<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"a\"<\/span><span class=\"mf\">.<\/span><span class=\"s2\">\"b\"<\/span><span class=\"mf\">.<\/span><span class=\"s2\">\"c\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$str\u306f<\/span><span class=\"err\">\u3010<\/span><span class=\"n\">abc<\/span><span class=\"err\">\u3011<\/span>\r\n\r\n<span class=\"nv\">$num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$value<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$num<\/span> <span class=\"mf\">.<\/span> <span class=\"mi\">77<\/span><span class=\"p\">;<\/span><span class=\"n\">\u6570\u5b57\u3082\u6587\u5b57\u5217\u306b\u306a\u308b<\/span><span class=\"err\">\u3002<\/span>\r\n<span class=\"nv\">$value\u306f<\/span><span class=\"err\">\u3010<\/span><span class=\"mi\">2077<\/span><span class=\"err\">\u3011<\/span>\r\n\r\n<span class=\"c1\">###NULL\u3060\u3063\u305f\u5834\u5408\u306e\u521d\u671f\u5024\u3092\u8a2d\u5b9a<\/span>\r\n<span class=\"nv\">$num<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$value<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$num<\/span> <span class=\"o\">??<\/span> <span class=\"mi\">2<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nv\">$value\u306f<\/span><span class=\"err\">\u3010<\/span><span class=\"mi\">2<\/span><span class=\"err\">\u3011<\/span>\r\n\r\n<span class=\"c1\">###\u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u6bd4\u8f03<\/span>\r\n<span class=\"s2\">\"99\"<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">99<\/span> <span class=\"n\">\u306f\u578b\u3092\u898b\u306a\u3044\u306e\u3067true<\/span>\r\n<span class=\"s2\">\"99\"<\/span> <span class=\"o\">===<\/span> <span class=\"mi\">99<\/span> <span class=\"n\">\u306f\u578b\u3082\u898b\u308b\u306e\u3067false<\/span>\r\n\r\n<span class=\"c1\">###treu false\u306eecho<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span> <span class=\"err\">\u3010<\/span><span class=\"mi\">1<\/span><span class=\"err\">\u3011<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"kc\">false<\/span><span class=\"p\">;<\/span> <span class=\"err\">\u3010\u3011<\/span><span class=\"n\">\u4f55\u3082\u8868\u793a\u3055\u308c\u306a\u3044\u306e\u3067\u6ce8\u610f<\/span>\r\n\r\n<span class=\"c1\">###HTML\u306b\u9069\u3057\u305f\u6761\u4ef6\u5206\u5c90<\/span>\r\n<span class=\"o\">&lt;?<\/span><span class=\"n\">php<\/span> <span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"n\">\u6761\u4ef6\u5f0f<\/span><span class=\"p\">)<\/span><span class=\"o\">:<\/span> <span class=\"cp\">?&gt;<\/span>\r\n HTML\u30b3\u30fc\u30c9\r\n<span class=\"cp\">&lt;?php<\/span> <span class=\"k\">elseif<\/span><span class=\"p\">(<\/span><span class=\"n\">\u6761\u4ef6\u5f0f<\/span><span class=\"p\">)<\/span><span class=\"o\">:<\/span> <span class=\"cp\">?&gt;<\/span>\r\n HTML\u30b3\u30fc\u30c9\r\n<span class=\"cp\">&lt;?php<\/span> <span class=\"k\">else<\/span> <span class=\"o\">:<\/span> <span class=\"cp\">?&gt;<\/span>\r\n HTML\u30b3\u30fc\u30c9\r\n<span class=\"cp\">&lt;?php<\/span> <span class=\"k\">endif<\/span><span class=\"p\">;<\/span> <span class=\"cp\">?&gt;<\/span>\r\n\r\n###\u95a2\u6570\u3067\u5f15\u6570\u306e\u6570\u304c\u4e0d\u660e\u306a\u5834\u5408\r\ntestFunction(\"\u540d\u524d\",\"\u5409\u7530\",\"\u4e0a\u7530\",\"\u91ce\u6751\");\r\n\/\/2\u756a\u76ee\u4ee5\u964d\u306e\u5f15\u6570\u306f$members\u306b\u914d\u5217\u3067\u683c\u7d0d\u3055\u308c\u308b\r\nfunction testFunc($name,...$members){\r\n    var_dump($members);\r\n}\r\n\r\n\r\n\/\/\u5f15\u6570\u3092\u56fa\u5b9a\u3057\u306a\u3044\r\nfunction testFunc(){\/\/\u5f15\u6570\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3088\u3044\r\n  $all = func_get_args(); \/\/\u3059\u3079\u3066\u306e\u5f15\u6570\u3092\u53d6\u5f97\r\n  $numSrgs = func_get_arg() \/\/\u5f15\u6570\u306e\u500b\u6570\u3092\u53d6\u5f97\r\n}\r\ntestFunc(10,20,30,40);\r\n###static\u5909\u6570\r\nstatic $count = 0;\r\n\u30ed\u30fc\u30ab\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u307f\u3002\u95a2\u6570\u3092\u629c\u3051\u3066\u3082\u5024\u306f\u30af\u30ea\u30a2\u3055\u308c\u306a\u3044\u3002\r\n\r\n###\u914d\u5217\u306e\u5024\u3092\u5408\u8a08\u3059\u308b\r\narray_sum(\u914d\u5217);\r\n\r\n###\u5909\u6570\u8fbc\u307f\u306e\u6587\u5b57\u5217\u306e\u51fa\u529b\r\n$str = \"\u5909\u6570\";\r\necho \"\u30c6\u30b9\u30c8{$str}\u6587\u7ae0\u3067\u3059\";\u3000\/\/\u5909\u6570\u3092{}\u3067\u304f\u304f\u308b\u3002\r\n=&gt;\u30c6\u30b9\u30c8\u5909\u6570\u6587\u7ae0\u3067\u3059\u3002\r\n\r\n\r\n###\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\r\n\u7b26\u53f7\u6307\u5b9a\u5b50\u3000+-\u3092\u4ed8\u3051\u308b\r\nprintf('%+d',-10); =&gt; -10\r\nprintf('%+d',10); =&gt;\u3000+10\r\n\r\n\u30d1\u30c7\u30a3\u30f3\u30b0\u6307\u5b9a\u5b50\u3000\u6307\u5b9a\u306e\u6841\u6570\u30920\u3067\u57cb\u3081\u308b(\u6307\u5b9a\u3067\u304d\u308b\u306e\u306f1\u6587\u5b57\u3060\u3051)\r\n\/\/3\u6841\u306e\u4f59\u308a\u30920\u3067\u57cb\u3081\u308b\r\nprintf('\u756a\u53f7\u306f%03d\u3067\u3059\u3002',3);\r\n=&gt; \u756a\u53f7\u306f003\u3067\u3059\u3002\u3000\r\n\r\n\/\/0\u4ee5\u5916\u306e\u6587\u5b57\u3067\u57cb\u3081\u308b \"\u3067\u56f2\u3063\u3066\u3001%\u306e\u5f8c\u306b'\u3092\u7f6e\u304f\r\nprintf(\"\u756a\u53f7%'*6d\",4);\r\n=&gt; \u756a\u53f7*****4\r\n\r\n\/\/\u65e5\u4ed8\u306b\u4f7f\u3046\r\nprintf('%04d-%02d-%02d,$year,$month,$day);\r\n=&gt; 1993-02-08\r\n\r\n\/\/\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u6307\u5b9a\u3059\u308b(\u7e70\u308a\u4e0a\u3052)\r\nprintf('%.2f',10.28438);\r\n=&gt;10.28\r\nprintf('%.03f',10.2);\r\n=&gt;10.200\r\n\r\n\/\/\u6307\u5b9a\u6570\u306e\u6587\u5b57\u6570\u3067\u5207\u308b\r\nprintf('%.5s ...',\"TestName\");\r\n=&gt;TestN ...\r\n\r\n\/\/\u914d\u5217\u3067\u6307\u5b9a vprintf()\r\n$data = array($max,$min,$ave);\r\n$format = '\u6700\u5927\u5024%.1f,\u6700\u5c0f\u5024%.1f,\u5e73\u5747\u5024%.1f';\r\nvprintf($format,$data);\r\n\r\n###\u6570\u5024\u3092\u30ab\u30f3\u30de\u3067\u533a\u5207\u308b\r\nnumber_format(2000);\r\n=&gt;2,000\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>###\u5909\u6570\u306e\u5024\u3092\u8868\u793a var_dump(\u5909\u6570) ###\u6587\u5b57\u5217\u306e\u4e2d\u306e\u6570\u5b57\u3092\u4f7f\u3063\u305f\u8a08\u7b97 $value = &#8220;2\u4eba&#8221; [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30277","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>PHP\u7b14\u8bb0 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP\u7b14\u8bb0\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\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/php\u7b14\u8bb0\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP\u7b14\u8bb0\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8ePHP\u7b14\u8bb0\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/php\u7b14\u8bb0\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T07:11:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T10:25:44+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5b87, \u534e\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0\/\",\"name\":\"PHP\u7b14\u8bb0 - Blog - Silicon 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