{"id":30600,"date":"2024-01-22T02:43:01","date_gmt":"2023-06-10T05:45:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%9f%ba%e7%a1%801\/"},"modified":"2025-08-12T19:56:53","modified_gmt":"2025-08-12T11:56:53","slug":"php%e7%9a%84%e5%9f%ba%e7%a1%801","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%9f%ba%e7%a1%801\/","title":{"rendered":"PHP\u7684\u57fa\u78401."},"content":{"rendered":"<h2>\u9996\u5148\u4f60\u597d\u3002<br \/>\n\u6211\u662f\u4e00\u540d\u76ee\u524d\u5c1a\u672a\u6709\u7ecf\u9a8c\u7684\u521d\u5b66\u8005\u5de5\u7a0b\u5e08\uff0c\u6b63\u5728\u8fdb\u884c\u5404\u79cd\u5b66\u4e60\u3002<br \/>\n\u6700\u8fd1\u5b66\u4e60\u4e86PHP\u7684\u57fa\u7840\u8bed\u6cd5\uff0c\u4e3a\u4e86\u5de9\u56fa\u81ea\u5df1\u7684\u5b66\u4e60\u6210\u679c\uff0c\u6211\u5199\u4e86\u4e00\u7bc7\u6587\u7ae0\u3002<br \/>\n\u7531\u4e8e\u8fd9\u662f\u6211\u7b2c\u4e00\u6b21\u53d1\u5e03\u6587\u7ae0\uff0c\u5982\u679c\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u8fd8\u8bf7\u591a\u591a\u5305\u6db5\u3002<\/p>\n<h2>\u57fa\u672c\u63cf\u8ff0<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n\r\n <span class=\"k\">echo<\/span> <span class=\"s1\">'hallo world'<\/span><span class=\"mf\">.<\/span><span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n <span class=\"k\">echo<\/span> <span class=\"s1\">'good morning!'<\/span><span class=\"mf\">.<\/span><span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>hallo world\r\ngood morning!\r\n<\/code><\/pre>\n<p>PHP_EOL \u662f PHP \u7684\u4e00\u4e2a\u9884\u5b9a\u4e49\u5e38\u91cf\uff0c\u5b83\u4f1a\u6839\u636e\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u8bbe\u7f6e\u6362\u884c\u7b26\u3002<\/p>\n<h2>\u73b0\u5728\u7684\u6863\u6848\uff08Nowdoc\uff09\u548c\u8fde\u7eed\u7684\u6863\u6848\uff08Heredoc\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'\u3053\u3093\u306b\u3061\u308f'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/$\u5909\u6570\u3092\u5ba3\u8a00<\/span>\r\n\r\n<span class=\"nv\">$text<\/span> <span class=\"o\">=<\/span> <span class=\"sh\">&lt;&lt;&lt;\"EOT\"\r\nhello!\r\n  this is looooong\r\ntext!\r\n$a\r\n\r\nEOT;<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$text<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>hello!\r\n  this is looooong\r\ntext!\r\n\u3053\u3093\u306b\u3061\u308f\r\n<\/code><\/pre>\n<p>\u53d8\u91cf = &lt;&lt;&lt;&#8220;EOT&#8221;<br \/>\n\u5904\u7406\u5185\u5bb9<br \/>\nEOT;<\/p>\n<p>\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u5b83\u53ef\u4ee5\u5c06\u4e0a\u8ff0\u6587\u672c\u548c\u7f29\u8fdb\u4fdd\u7559\u7684\u5185\u5bb9\u5206\u914d\u7ed9\u53d8\u91cf\u3002<br \/>\n\u7ec8\u7aef\u6807\u8bb0\u88ab\u79f0\u4e3aEOT\u3002<br \/>\n\u6b64\u5904\u7406\u4e2d\uff0c\u5c55\u5f00\u53d8\u91cf\u88ab\u79f0\u4e3aheredoc\uff08\u8bd1\u6ce8\uff1a\u5bf9\u5e94\u300c\u884c\u5185\u6587\u6863\u300d\uff09\uff0c\u4e0d\u5c55\u5f00\u53d8\u91cf\u7684\u5199\u6cd5\u88ab\u79f0\u4e3anowdoc\uff08\u8bd1\u6ce8\uff1a\u5bf9\u5e94\u300c\u88f8\u6587\u6863\u300d\uff09\u3002<\/p>\n<h2>\u5982\u679c<\/p>\n<pre class=\"post-pre\"><code> if(\u6761\u4ef6){\r\n\t\u51e6\u7406\r\n }\r\n<\/code><\/pre>\n<p>\u4f5c\u4e3a\u6211\u7b2c\u4e00\u6b21\u4e86\u89e3\u5230\u7684\u4e8b\u60c5\uff0c\u5047\u8bbe\u6709\u8fd9\u6837\u7684\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"p\">;<\/span>\r\n \r\n<span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">){<\/span>\r\n   <span class=\"k\">echo<\/span> <span class=\"s1\">'\u7d50\u679c\u306ftrue\u3067\u3059'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n   <span class=\"k\">echo<\/span> <span class=\"s1\">'\u7d50\u679c\u306ffalse\u3067\u3059'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u7ed3\u679c\u662f&#8230; (zh\u00e8 g\u00e8 sh\u00ec&#8230;)<\/p>\n<pre class=\"post-pre\"><code>\u7d50\u679c\u306ftrue\u3067\u3059\r\n<\/code><\/pre>\n<p>\u5728\u5224\u65ad\u5e03\u5c14\u503c\u65f6\uff0c\u4ee5\u4e0b\u7684\u60c5\u51b5\u90fd\u4f1a\u88ab\u89c6\u4e3afalse\uff1a\u00b10\uff0c\u00b10.0\uff0c&#8217;0&#8217;\uff0c&#8221;\uff0cnull\uff0c[]\u3002<\/p>\n<h2>\u903b\u8f91\u8fd0\u7b97\u7b26<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$score<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">60<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$name<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'tanaka'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$score<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"mi\">50<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nv\">$name<\/span> <span class=\"o\">===<\/span> <span class=\"s1\">'tanaka'<\/span><span class=\"p\">){<\/span>\r\n  <span class=\"k\">echo<\/span> <span class=\"s1\">'Good job!'<\/span><span class=\"mf\">.<\/span><span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ &amp;&amp; and \u306a\u304a\u304b\u3064<\/span>\r\n<span class=\"c1\">\/\/ || or \u3082\u3057\u304f\u308f<\/span>\r\n<span class=\"c1\">\/\/ ! ~\u3067\u306f\u306a\u3044<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>Good job!\r\n<\/code><\/pre>\n<p>\u5982\u679c\u5206\u6570\u8d85\u8fc750\u4e14\u59d3\u540d\u4e3a\u7530\u4e2d\u5148\u751f\uff0c\u5219\u6267\u884c\u8be5\u5904\u7406\u3002<\/p>\n<h2>\u5207\u6362\u8bed\u53e5<\/p>\n<pre class=\"post-pre\"><code>switch($\u5909\u6570){\r\n  case \u2018\u5224\u5b9a\u3057\u305f\u3044\u5024\u2019: \/\/\u30b3\u30ed\u30f3\r\n    echo \u51e6\u7406;\r\n    break;\u3000\/\/\u3053\u3053\u3067\u51e6\u7406\u3092\u6b62\u3081\u308b\r\n }\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$signal<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'blue'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">switch<\/span><span class=\"p\">(<\/span><span class=\"nv\">$signal<\/span><span class=\"p\">){<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'red'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Stop!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'yellow'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Caution!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'blue'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Go!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>Go!\r\n<\/code><\/pre>\n<p>\u5982\u679c\u5fd8\u8bb0\u5199break\uff0c\u6240\u6709\u4ee3\u7801\u90fd\u4f1a\u88ab\u6267\u884c\uff0c\u6240\u4ee5\u8981\u5c0f\u5fc3\u3002<br \/>\n\u53e6\u5916\uff0c\u4f7f\u7528default\u53ef\u4ee5\u6307\u793a\u5728\u6ca1\u6709\u5339\u914d\u65f6\u6267\u884c\u67d0\u4e9b\u5904\u7406\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$signal<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'pink'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">switch<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$signal<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'red'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Stop!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'yellow'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Caution!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'blue'<\/span><span class=\"o\">:<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"s1\">'green'<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'Go!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n      <span class=\"k\">echo<\/span> <span class=\"s1\">'Wrongsignal'<\/span><span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n      <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>Wrongsignal\r\n<\/code><\/pre>\n<h2>\u6c42\u628a\u4e0b\u9762\u7684\u53e5\u5b50\u6bcd\u9648\u73b0\u9053\u7684\u4e2d\u6587\u53e5\u5b50: \u51fd\u6570<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">\u95a2\u6570\u540d<\/span><span class=\"p\">(){<\/span>\r\n\t<span class=\"c1\">\/\/\u3053\u3053\u306b\u51e6\u7406\u5185\u5bb9<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">\u95a2\u6570\u540d<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/\u3053\u308c\u3067\u547c\u3073\u51fa\u3057\u304c\u3067\u304d\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">showAd<\/span><span class=\"p\">(<\/span><span class=\"nv\">$message<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'Ad'<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/\u4eee\u5f15\u6570<\/span>\r\n<span class=\"p\">{<\/span>\r\n  <span class=\"k\">echo<\/span> <span class=\"s1\">'----------'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">echo<\/span> <span class=\"s1\">'---'<\/span><span class=\"mf\">.<\/span><span class=\"nv\">$message<\/span><span class=\"mf\">.<\/span> <span class=\"s1\">'---'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">echo<\/span> <span class=\"s1\">'----------'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nf\">showAd<\/span><span class=\"p\">(<\/span><span class=\"s1\">'Header Ad'<\/span><span class=\"p\">);<\/span><span class=\"c1\">\/\/\u5b9f\u5f15\u6570<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'Tom is great!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'Bob is great!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nf\">showAd<\/span><span class=\"p\">();<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'Steve is great!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'Bob is great!'<\/span> <span class=\"mf\">.<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nf\">showAd<\/span><span class=\"p\">(<\/span><span class=\"s1\">'footer Ad'<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>----------\r\n---Header Ad---\r\n----------\r\nTom is great!\r\nBob is great!\r\n----------\r\n---Ad---\r\n----------\r\nSteve is great!\r\nBob is great!\r\n----------\r\n---footer Ad---\r\n----------\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8981\u4f7f\u7528\u51fd\u6570\uff0c\u5c31\u65e0\u6cd5\u4ece\u5916\u90e8\u5f15\u5165\u53d8\u91cf\u3002<br \/>\n\u5982\u679c\u60f3\u8981\u4ece\u5916\u90e8\u5f15\u5165\u53d8\u91cf\uff0c\u5219\u9700\u8981\u5199\u4e0a &#8220;global $\u53d8\u91cf&#8221;\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148\u4f60\u597d\u3002 \u6211\u662f\u4e00\u540d\u76ee\u524d\u5c1a\u672a\u6709\u7ecf\u9a8c\u7684\u521d\u5b66\u8005\u5de5\u7a0b\u5e08\uff0c\u6b63\u5728\u8fdb\u884c\u5404\u79cd\u5b66\u4e60\u3002 \u6700\u8fd1\u5b66\u4e60\u4e86PHP\u7684\u57fa\u7840\u8bed\u6cd5\uff0c\u4e3a\u4e86\u5de9\u56fa\u81ea\u5df1 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30600","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\u7684\u57fa\u78401. - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP\u7684\u57fa\u78401.\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\u7684\u57fa\u78401\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" 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