{"id":4301,"date":"2025-07-30T10:52:45","date_gmt":"2025-07-30T02:52:45","guid":{"rendered":"https:\/\/www.zhaozhao123.cn\/wpcms\/?p=4301"},"modified":"2025-07-30T10:52:45","modified_gmt":"2025-07-30T02:52:45","slug":"%e4%bb%a3%e7%a0%81%e8%a7%a3%e9%87%8a%ef%bc%9aplaceholders-implode-array_fill0-countpost_types-s","status":"publish","type":"post","link":"https:\/\/www.zhaozhao123.cn\/wpcms\/post\/4301.html","title":{"rendered":"\u4ee3\u7801\u89e3\u91ca\uff1a$placeholders = implode(‘, ‘, array_fill(0, count($post_types), ‘%s’));"},"content":{"rendered":"\n

\u62c6\u89e3\u4ee3\u7801\uff1a$placeholders = implode(', ', array_fill(0, count($post_types), '%s'));<\/code><\/h3>\n\n\n\n

\u8fd9\u6bb5\u4ee3\u7801\u7684\u4f5c\u7528\u662f\u751f\u6210\u4e00\u4e2a\u9017\u53f7\u5206\u9694\u7684\u5360\u4f4d\u7b26\u5b57\u7b26\u4e32<\/strong>\uff0c\u5176\u957f\u5ea6\u4e0e\u6570\u7ec4 $post_types<\/code> \u7684\u5143\u7d20\u6570\u91cf\u76f8\u540c\u3002\u4e0b\u9762\u6211\u4e00\u6b65\u6b65\u62c6\u89e3\uff0c\u7528\u6700\u7b80\u5355\u7684\u65b9\u5f0f\u89e3\u91ca\uff08\u5c31\u50cf\u7ed9\u7f16\u7a0b\u5c0f\u767d\u8bb2\u4e00\u6837\uff09\u3002\u5047\u8bbe $post_types<\/code> \u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u4f8b\u5982 ['post', 'page', 'attachment']<\/code>\uff08\u5305\u542b 3 \u4e2a\u5143\u7d20\uff09\u3002<\/p>\n\n\n\n

\n\n\n\n

\u6b65\u9aa4 1\uff1a\u5148\u7406\u89e3\u6bcf\u4e2a\u90e8\u5206\u7684\u4f5c\u7528<\/h3>\n\n\n\n

\u4ee3\u7801\u53ef\u4ee5\u62c6\u89e3\u6210\u4e09\u4e2a\u6838\u5fc3\u51fd\u6570\uff0c\u50cf\u642d\u79ef\u6728\u4e00\u6837\u7ec4\u5408\uff1a<\/p>\n\n\n\n

    \n
  1. count($post_types)<\/code><\/strong>\uff1a\u6570\u4e00\u6570\u6570\u7ec4 $post_types<\/code> \u91cc\u6709\u591a\u5c11\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ol>\n\n\n\n
      \n
    • \u4f8b\u5982\uff1a\u5982\u679c $post_types = ['post', 'page', 'attachment']<\/code>\uff0c\u90a3\u4e48 count($post_types)<\/code> \u7684\u7ed3\u679c\u662f 3<\/code>\uff08\u56e0\u4e3a\u6570\u7ec4\u6709 3 \u4e2a\u5143\u7d20\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
        \n
      1. array_fill(0, \u6570\u91cf, '\u503c')<\/code><\/strong>\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4<\/strong>\uff0c\u7528\u6307\u5b9a\u7684\u503c\u586b\u5145\u6307\u5b9a\u6570\u91cf\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ol>\n\n\n\n
          \n
        • \u53c2\u6570\u89e3\u91ca\uff1a\n
            \n
          • 0<\/code>\uff1a\u4ece\u6570\u7ec4\u7684\u7b2c 0 \u4e2a\u4f4d\u7f6e\u5f00\u59cb\uff08\u6570\u7ec4\u7d22\u5f15\u901a\u5e38\u4ece 0 \u5f00\u59cb\uff09\u3002<\/li>\n\n\n\n
          • \u6570\u91cf<\/code>\uff1a\u8981\u586b\u5145\u591a\u5c11\u4e2a\u5143\u7d20\uff08\u8fd9\u91cc\u7528 count($post_types)<\/code> \u7684\u7ed3\u679c\uff09\u3002<\/li>\n\n\n\n
          • '\u503c'<\/code>\uff1a\u6bcf\u4e2a\u4f4d\u7f6e\u586b\u5145\u7684\u5185\u5bb9\uff08\u8fd9\u91cc\u662f '%s'<\/code>\uff0c\u4e00\u4e2a\u5360\u4f4d\u7b26\u7b26\u53f7\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • \u4f8b\u5982\uff1aarray_fill(0, 3, '%s')<\/code> \u4f1a\u751f\u6210\u4e00\u4e2a\u65b0\u6570\u7ec4\uff1a['%s', '%s', '%s']<\/code>\uff08\u4e00\u4e2a\u5305\u542b 3 \u4e2a %s<\/code> \u7684\u6570\u7ec4\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
              \n
            1. implode('\u5206\u9694\u7b26', \u6570\u7ec4)<\/code><\/strong>\uff1a\u628a\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u62fc\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32<\/strong>\uff0c\u5143\u7d20\u4e4b\u95f4\u7528\u6307\u5b9a\u7684\u201c\u5206\u9694\u7b26\u201d\u8fde\u63a5\u3002<\/li>\n<\/ol>\n\n\n\n
                \n
              • \u53c2\u6570\u89e3\u91ca\uff1a\n
                  \n
                • ', '<\/code>\uff1a\u5206\u9694\u7b26\u662f\u201c\u9017\u53f7+\u7a7a\u683c\u201d\uff08\u4f8b\u5982 A, B, C<\/code>\uff09\u3002<\/li>\n\n\n\n
                • \u6570\u7ec4<\/code>\uff1a\u8981\u62fc\u63a5\u7684\u6570\u7ec4\uff08\u8fd9\u91cc\u7528 array_fill()<\/code> \u751f\u6210\u7684\u65b0\u6570\u7ec4\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                • \u4f8b\u5982\uff1aimplode(', ', ['%s', '%s', '%s'])<\/code> \u4f1a\u751f\u6210\u5b57\u7b26\u4e32 '%s, %s, %s'<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n
                  \n\n\n\n

                  \u6b65\u9aa4 2\uff1a\u6574\u4e2a\u4ee3\u7801\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n\n\n\n

                  \u5047\u8bbe $post_types = ['post', 'page', 'attachment']<\/code>\uff083 \u4e2a\u5143\u7d20\uff09\uff1a<\/p>\n\n\n\n

                    \n
                  1. \u5148\u8ba1\u7b97\u6570\u7ec4\u957f\u5ea6<\/strong>\uff1acount($post_types)<\/code> \u2192 \u7ed3\u679c\u662f 3<\/code>\u3002<\/li>\n\n\n\n
                  2. \u586b\u5145\u65b0\u6570\u7ec4<\/strong>\uff1aarray_fill(0, 3, '%s')<\/code> \u2192 \u751f\u6210\u6570\u7ec4 ['%s', '%s', '%s']<\/code>\u3002<\/li>\n\n\n\n
                  3. \u62fc\u63a5\u6210\u5b57\u7b26\u4e32<\/strong>\uff1aimplode(', ', ['%s', '%s', '%s'])<\/code> \u2192 \u751f\u6210\u5b57\u7b26\u4e32 '%s, %s, %s'<\/code>\u3002<\/li>\n\n\n\n
                  4. \u8d4b\u503c\u7ed9\u53d8\u91cf<\/strong>\uff1a$placeholders = '%s, %s, %s'<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n

                    \u6700\u7ec8\uff0c$placeholders<\/code> \u7684\u503c\u662f '%s, %s, %s'<\/code>\u3002<\/p>\n\n\n\n

                    \n\n\n\n

                    \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u6837\u505a\uff1f\u5b9e\u9645\u7528\u9014<\/h3>\n\n\n\n
                      \n
                    • \u5360\u4f4d\u7b26\u7684\u4f5c\u7528<\/strong>\uff1a\u5728\u6570\u636e\u5e93\u67e5\u8be2\uff08\u5982 SQL\uff09\u4e2d\uff0c%s<\/code> \u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u5360\u4f4d\u7b26\uff0c\u8868\u793a\u201c\u8fd9\u91cc\u7a0d\u540e\u8981\u66ff\u6362\u6210\u4e00\u4e2a\u771f\u5b9e\u7684\u503c\u201d\u3002\u4f8b\u5982\uff0c\u5728 WordPress \u6216 PHP \u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\uff0c\u5b83\u7528\u4e8e\u5b89\u5168\u5730\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\u3002<\/li>\n\n\n\n
                    • \u52a8\u6001\u9002\u914d\u6570\u7ec4\u957f\u5ea6<\/strong>\uff1a\u65e0\u8bba $post_types<\/code> \u6570\u7ec4\u6709\u591a\u5c11\u4e2a\u5143\u7d20\uff08\u6bd4\u5982 2 \u4e2a\u30015 \u4e2a\u6216 100 \u4e2a\uff09\uff0c\u8fd9\u6bb5\u4ee3\u7801\u90fd\u4f1a\u751f\u6210\u5bf9\u5e94\u6570\u91cf\u7684 %s<\/code>\uff0c\u5e76\u7528\u9017\u53f7\u5206\u9694\u3002<\/li>\n\n\n\n
                    • \u5982\u679c $post_types<\/code> \u6709 2 \u4e2a\u5143\u7d20 \u2192 $placeholders = '%s, %s'<\/code><\/li>\n\n\n\n
                    • \u5982\u679c $post_types<\/code> \u6709 5 \u4e2a\u5143\u7d20 \u2192 $placeholders = '%s, %s, %s, %s, %s'<\/code><\/li>\n\n\n\n
                    • \u5178\u578b\u573a\u666f<\/strong>\uff1a\u6784\u5efa SQL \u67e5\u8be2\u7684 IN<\/code> \u6761\u4ef6\u65f6\uff0c\u6bd4\u5982\uff1a<\/li>\n<\/ul>\n\n\n\n
                        $query = \"SELECT * FROM posts WHERE type IN ($placeholders)\";\n  \/\/ \u5982\u679c $placeholders \u662f '%s, %s, %s'\uff0c\u67e5\u8be2\u4f1a\u53d8\u6210\uff1a\n  \/\/ SELECT * FROM posts WHERE type IN (%s, %s, %s)\n  \/\/ \u4e4b\u540e\u53ef\u4ee5\u7528\u771f\u5b9e\u503c\u66ff\u6362\u8fd9\u4e9b %s\uff08\u5982 'post', 'page', 'attachment'\uff09<\/code><\/pre>\n\n\n\n
                      \n\n\n\n
                      \u4e00\u53e5\u8bdd\u603b\u7ed3<\/h3>\n\n\n\n
                      \u8fd9\u6bb5\u4ee3\u7801\u6839\u636e\u6570\u7ec4 $post_types<\/code> \u7684\u5143\u7d20\u6570\u91cf\uff0c\u751f\u6210\u4e00\u4e2a\u9017\u53f7\u5206\u9694\u7684 %s<\/code> \u5b57\u7b26\u4e32<\/strong>\uff0c\u4e3a\u540e\u7eed\u6570\u636e\u5e93\u67e5\u8be2\u6216\u5176\u4ed6\u64cd\u4f5c\u63d0\u4f9b\u52a8\u6001\u5360\u4f4d\u7b26\u3002\u5c31\u50cf\u6309\u4eba\u6570\u51c6\u5907\u5ea7\u4f4d\uff1a\u6570\u7ec4\u6709\u51e0\u4e2a\u5143\u7d20\uff0c\u5c31\u751f\u6210\u51e0\u4e2a %s<\/code> \u5ea7\u4f4d\uff0c\u5e76\u7528\u9017\u53f7\u9694\u5f00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                      \u62c6\u89e3\u4ee3\u7801\uff1a$placeholders = implode(‘, ‘, array_fill(0, count($post_types), ‘%s’)); \u8fd9\u6bb5\u4ee3\u7801\u7684\u4f5c\u7528\u662f\u751f\u6210\u4e00\u4e2a\u9017\u53f7\u5206\u9694\u7684\u5360\u4f4d\u7b26\u5b57\u7b26\u4e32\uff0c\u5176\u957f\u5ea6\u4e0e\u6570\u7ec4 $post_types \u7684\u5143\u7d20\u6570\u91cf\u76f8\u540c\u3002\u4e0b\u9762\u6211\u4e00\u6b65\u6b65\u62c6\u89e3\uff0c\u7528\u6700\u7b80\u5355\u7684\u65b9\u5f0f\u89e3\u91ca\uff08\u5c31\u50cf\u7ed9\u7f16\u7a0b\u5c0f\u767d\u8bb2\u4e00\u6837\uff09\u3002\u5047..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"tuisongtax":[],"class_list":["post-4301","post","type-post","status-publish","format-standard","hentry","category-wpdt"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/posts\/4301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/comments?post=4301"}],"version-history":[{"count":0,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/posts\/4301\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/media?parent=4301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/categories?post=4301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/tags?post=4301"},{"taxonomy":"tuisongtax","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/wpcms\/wp-json\/wp\/v2\/tuisongtax?post=4301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}