{"id":173603,"date":"2024-11-07T19:24:19","date_gmt":"2024-11-07T11:24:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173603\/"},"modified":"2024-11-07T19:24:21","modified_gmt":"2024-11-07T11:24:21","slug":"%e5%a6%82%e4%bd%95%e5%b0%87blob%e6%95%b8%e6%93%9a%e5%ad%98%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-blob%e5%ad%98%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173603\/","title":{"rendered":"\u5982\u4f55\u5c07blob\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\uff1f (blob\u5b58\u5165\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%b0%87blob%e6%95%b8%e6%93%9a%e5%ad%98%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-nBSAaRLzHP\">\u5982\u4f55\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u7684\u5b58\u5132\u65b9\u5f0f\u591a\u7a2e\u591a\u6a23\uff0c\u5176\u4e2dBLOB\uff08Binary Large Object\uff09\u662f\u4e00\u7a2e\u5e38\u7528\u7684\u6578\u64da\u985e\u578b\uff0c\u5c08\u9580\u7528\u65bc\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u5982\u5716\u7247\u3001\u97f3\u983b\u3001\u8996\u983b\u7b49\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"blob%e6%95%b8%e6%93%9a%e7%9a%84%e5%ae%9a%e7%be%a9-nBSAaRLzHP\">BLOB\u6578\u64da\u7684\u5b9a\u7fa9<\/h2>\n<p>BLOB\u662f\u4e00\u7a2e\u6578\u64da\u985e\u578b\uff0c\u901a\u5e38\u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\u3002\u6839\u64da\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff0cBLOB\u7684\u5927\u5c0f\u548c\u985e\u578b\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\u3002\u4e00\u822c\u4f86\u8aaa\uff0cBLOB\u53ef\u4ee5\u5206\u70ba\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>TINYBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba 255 \u5b57\u7bc0\u3002<\/li>\n<li><strong>BLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba 65,535 \u5b57\u7bc0\u3002<\/li>\n<li><strong>MEDIUMBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba 16,777,215 \u5b57\u7bc0\u3002<\/li>\n<li><strong>LONGBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba 4,294,967,295 \u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b0%87blob%e6%95%b8%e6%93%9a%e5%ad%98%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f-nBSAaRLzHP\">\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\u7684\u6b65\u9a5f<\/h2>\n<p>\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-nBSAaRLzHP\">1. \u5275\u5efa\u6578\u64da\u5eab\u8868<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u5305\u542bBLOB\u5b57\u6bb5\u7684\u6578\u64da\u5eab\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528MySQL\u5275\u5efa\u8868\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE images (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    image_data LONGBLOB NOT NULL,\n    image_name VARCHAR(255) NOT NULL\n);<\/code><\/pre>\n<h3 id=\"2-%e6%ba%96%e5%82%99blob%e6%95%b8%e6%93%9a-nBSAaRLzHP\">2. \u6e96\u5099BLOB\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u6e96\u5099\u8981\u5b58\u5132\u7684BLOB\u6578\u64da\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u5f9e\u6587\u4ef6\u7cfb\u7d71\u4e2d\u8b80\u53d6\u6587\u4ef6\u4e26\u5c07\u5176\u8f49\u63db\u70ba\u4e8c\u9032\u5236\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PHP\u8b80\u53d6\u5716\u7247\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n$imagePath = 'path\/to\/image.jpg';\n$imageData = file_get_contents($imagePath);\n?&gt;<\/code><\/pre>\n<h3 id=\"3-%e5%b0%87blob%e6%95%b8%e6%93%9a%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab-nBSAaRLzHP\">3. \u5c07BLOB\u6578\u64da\u63d2\u5165\u6578\u64da\u5eab<\/h3>\n<p>\u4e00\u65e6\u6211\u5011\u6e96\u5099\u597d\u4e86BLOB\u6578\u64da\uff0c\u5c31\u53ef\u4ee5\u5c07\u5176\u63d2\u5165\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PDO\u7684PHP\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\ntry {\n    $pdo = new PDO('mysql:host=localhost;dbname=testdb', 'username', 'password');\n    $pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n    $stmt = $pdo-&gt;prepare(\"INSERT INTO images (image_data, image_name) VALUES (:image_data, :image_name)\");\n    $stmt-&gt;bindParam(':image_data', $imageData, PDO::PARAM_LOB);\n    $stmt-&gt;bindParam(':image_name', $imageName);\n    \n    $imageName = 'image.jpg';\n    $stmt-&gt;execute();\n} catch (PDOException $e) {\n    echo 'Connection failed: ' . $e-&gt;getMessage();\n}\n?&gt;<\/code><\/pre>\n<h2 id=\"%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%aa%a2%e7%b4%a2blob%e6%95%b8%e6%93%9a-nBSAaRLzHP\">\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22BLOB\u6578\u64da<\/h2>\n<p>\u9664\u4e86\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\u5916\uff0c\u6aa2\u7d22\u9019\u4e9b\u6578\u64da\u540c\u6a23\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22BLOB\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n$stmt = $pdo-&gt;prepare(\"SELECT image_data FROM images WHERE id = :id\");\n$stmt-&gt;bindParam(':id', $id);\n$id = 1; \/\/ \u5047\u8a2d\u6211\u5011\u8981\u6aa2\u7d22ID\u70ba1\u7684\u5716\u7247\n$stmt-&gt;execute();\n$imageData = $stmt-&gt;fetchColumn();\n\nheader(\"Content-Type: image\/jpeg\");\necho $imageData;\n?&gt;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-nBSAaRLzHP\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u8655\u7406BLOB\u6578\u64da\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u914d\u7f6e\u80fd\u5920\u652f\u6301BLOB\u985e\u578b\u7684\u6578\u64da\u3002<\/li>\n<li>\u5728\u63d2\u5165\u548c\u6aa2\u7d22BLOB\u6578\u64da\u6642\uff0c\u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b\u548c\u53c3\u6578\u7d81\u5b9a\u3002<\/li>\n<li>\u8003\u616e\u5230\u6027\u80fd\u554f\u984c\uff0c\u5c0d\u65bc\u975e\u5e38\u5927\u7684BLOB\u6578\u64da\uff0c\u53ef\u80fd\u9700\u8981\u8003\u616e\u4f7f\u7528\u6587\u4ef6\u7cfb\u7d71\u5b58\u5132\u4e26\u5728\u6578\u64da\u5eab\u4e2d\u4fdd\u5b58\u6587\u4ef6\u8def\u5f91\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nBSAaRLzHP\">\u7e3d\u7d50<\/h2>\n<p>\u5c07BLOB\u6578\u64da\u5b58\u5165\u6578\u64da\u5eab\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u6578\u64da\u7684\u6e96\u5099\u548c\u5b58\u5132\u65b9\u5f0f\u3002\u901a\u904e\u6b63\u78ba\u7684\u6b65\u9a5f\u548c\u4ee3\u78bc\u793a\u4f8b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u4e8c\u9032\u5236\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u5b58\u5132\u548c\u6aa2\u7d22BLOB\u6578\u64da\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u78ba\u4fdd\u60a8\u7684\u6578\u64da\u5b89\u5168\u548c\u9ad8\u6548\u5b58\u53d6\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5c07BLOB\u6578\u64da\u6709\u6548\u5b58\u5165\u6578\u64da\u5eab\uff0c\u5305\u62ec\u6b65\u9a5f\u3001\u6700\u4f73\u5be6\u8e10\u53ca\u5e38\u898b\u554f\u984c\u89e3\u7b54\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-173603","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=173603"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173603\/revisions"}],"predecessor-version":[{"id":173604,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173603\/revisions\/173604"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}