{"id":30870,"date":"2023-11-28T10:54:00","date_gmt":"2023-10-11T17:09:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0%e3%80%90%e5%86%99%e4%bd%9c%e6%96%b9%e6%b3%95%e3%80%91\/"},"modified":"2025-08-12T21:10:20","modified_gmt":"2025-08-12T13:10:20","slug":"php%e7%ac%94%e8%ae%b0%e3%80%90%e5%86%99%e4%bd%9c%e6%96%b9%e6%b3%95%e3%80%91","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%ac%94%e8%ae%b0%e3%80%90%e5%86%99%e4%bd%9c%e6%96%b9%e6%b3%95%e3%80%91\/","title":{"rendered":"PHP\u7b14\u8bb0\u3010\u5199\u4f5c\u65b9\u6cd5\u3011"},"content":{"rendered":"<p>\u4fbf\u7b7e<\/p>\n<h1>\u5173\u4e8e\u95ed\u5408\u6807\u7b7e<\/h1>\n<p>PHP\u662f\u5d4c\u5165\u5728HTML\u4ee3\u7801\u4e2d\u7684\u8bed\u8a00\uff0c\u800c<!--?php\uff5e? &gt;\u88ab\u79f0\u4e3a\u811a\u672c\u5206\u754c\u7b26\uff08PHP\u6807\u7b7e\uff09\u3002&lt;\/p&gt;\n&lt;p&gt;\u5982\u679c\u6269\u5c55\u540d\u662f.php, \u6587\u4ef6\u672b\u5c3e\u7684\u811a\u672c\u95ed\u5408\u6807\u7b7e(?-->)\u53ef\u4ee5\u7701\u7565\u3002<br \/>\n\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\u811a\u672c\u540e\u9762\u6709HTML\u4ee3\u7801\uff0c\u5219\u4e0d\u80fd\u7701\u7565\u3002<br \/>\n\u8bf7\u6ce8\u610f\uff0c\u5728\u7ed3\u675f\u6807\u7b7e\u540e\u6709\u7a7a\u683c\u6216\u6362\u884c\u4f1a\u5bfc\u81f4\u9875\u9762\u6837\u5f0f\u9519\u4e71\u3002<\/p>\n<h1>\u6f14\u5458\u9635\u5bb9<\/h1>\n<p>PHP\u7684\u7c7b\u578b\u5b9a\u4e49\u6709\u70b9\u50cfRuby\uff0c\u4f46\u597d\u50cf\u53ef\u4ee5\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff01<br \/>\n\u4e0d\u8fc7Ruby\u4e5f\u53ef\u4ee5\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff0c\u53ea\u662f\u8f6c\u6362\u7684\u65b9\u5f0f\u611f\u89c9\u975e\u5e38\u50cfC\u8bed\u8a00\uff01<\/p>\n<p>var_dump\u53ef\u4ee5\u5c55\u793a\u53d8\u91cf\u7684\u7c7b\u578b\u548c\u4fe1\u606f\uff0c\u771f\u662f\u4e2a\u65b9\u4fbf\u7684\u5de5\u5177\uff01<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n <span class=\"nb\">var_dump<\/span><span class=\"p\">((<\/span><span class=\"n\">int<\/span><span class=\"p\">)<\/span><span class=\"mf\">23.5<\/span><span class=\"p\">);<\/span>\r\n <span class=\"nb\">var_dump<\/span><span class=\"p\">((<\/span><span class=\"n\">int<\/span><span class=\"p\">)<\/span><span class=\"o\">-<\/span><span class=\"mf\">1000.1234<\/span><span class=\"p\">);<\/span>\r\n <span class=\"nb\">var_dump<\/span><span class=\"p\">((<\/span><span class=\"n\">unset<\/span><span class=\"p\">)<\/span><span class=\"s2\">\"test\"<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u5c06unset\u8f6c\u6362\u4e3anull\u7c7b\u578b\u3002<br \/>\n\u5982\u679c\u8981\u5c06\u5176\u8bbe\u7f6e\u4e3anull\u7c7b\u578b\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u4e00\u5f00\u59cb\u5c31\u8bbe\u4e3anull\u5462\uff1f\u4e0d\u77e5\u9053\u4ec0\u4e48\u65f6\u5019\u4f1a\u7528\u5230\u5b83\u2026\u2026\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fbf\u7b7e \u5173\u4e8e\u95ed\u5408\u6807\u7b7e PHP\u662f\u5d4c\u5165\u5728HTML\u4ee3\u7801\u4e2d\u7684\u8bed\u8a00\uff0c\u800c)\u53ef\u4ee5\u7701\u7565\u3002 \u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\u811a\u672c\u540e\u9762\u6709HTML\u4ee3\u7801 [&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-30870","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) - 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