{"id":30877,"date":"2022-09-18T14:59:27","date_gmt":"2023-09-12T04:27:56","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e4%b8%8d%e5%a5%bd%e4%b9%8b%e5%a4%84\/"},"modified":"2025-08-12T21:12:02","modified_gmt":"2025-08-12T13:12:02","slug":"php%e7%9a%84%e4%b8%8d%e5%a5%bd%e4%b9%8b%e5%a4%84","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e4%b8%8d%e5%a5%bd%e4%b9%8b%e5%a4%84\/","title":{"rendered":"PHP\u7684\u4e0d\u597d\u4e4b\u5904"},"content":{"rendered":"<p>\u5373\u4f7f\u6709\u4ee5\u4e0b\u8fd9\u6837\u7684\u51fd\u6570\uff0c\u751a\u81f3\u90fd\u6ca1\u6709\u8b66\u544a\uff0c\u8fd9\u771f\u662f\u6709\u70b9\u2026\u2026<br \/>\n\u4eca\u5929\u6211\u78b0\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"k\">function<\/span> <span class=\"n\">hoge<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">){<\/span>\r\n        <span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">)<\/span> <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nb\">gettype<\/span><span class=\"p\">(<\/span><span class=\"nf\">hoge<\/span><span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">))<\/span><span class=\"mf\">.<\/span><span class=\"nb\">chr<\/span><span class=\"p\">(<\/span><span class=\"mi\">10<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nb\">gettype<\/span><span class=\"p\">(<\/span><span class=\"nf\">hoge<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">))<\/span><span class=\"mf\">.<\/span><span class=\"nb\">chr<\/span><span class=\"p\">(<\/span><span class=\"mi\">10<\/span><span class=\"p\">);<\/span> \r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>boolean\r\nNULL\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5373\u4f7f\u6709\u4ee5\u4e0b\u8fd9\u6837\u7684\u51fd\u6570\uff0c\u751a\u81f3\u90fd\u6ca1\u6709\u8b66\u544a\uff0c\u8fd9\u771f\u662f\u6709\u70b9\u2026\u2026 \u4eca\u5929\u6211\u78b0\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002 &lt;?php functio [&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-30877","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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