{"id":96606,"date":"2024-10-20T10:51:16","date_gmt":"2024-10-20T02:51:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96606\/"},"modified":"2024-10-20T10:51:17","modified_gmt":"2024-10-20T02:51:17","slug":"php%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%af%a9%e9%81%b8%e6%9f%a5%e8%a9%a2-php%e7%af%a9%e9%81%b8%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96606\/","title":{"rendered":"php\u5be6\u73fe\u6578\u64da\u5eab\u7be9\u9078\u67e5\u8a62 (php\u7be9\u9078\u8b80\u53d6\u6578\u64da\u5eab)"},"content":{"rendered":"

PHP\u5be6\u73fe\u6578\u64da\u5eab\u7be9\u9078\u67e5\u8a62<\/h1>\n

\u5728\u73fe\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u7d93\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u7528\u65bc\u5b58\u5132\u7528\u6236\u4fe1\u606f\u3001\u7522\u54c1\u6578\u64da\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\uff0c\u6578\u64da\u5eab\u90fd\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528PHP\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u7684\u7be9\u9078\u67e5\u8a62\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002<\/p>\n

\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n

\u5728\u9032\u884c\u4efb\u4f55\u67e5\u8a62\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u8207\u6578\u64da\u5eab\u5efa\u7acb\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528PHP\u7684MySQLi\u64f4\u5c55\u4f86\u9023\u63a5\u6578\u64da\u5eab\u7684\u57fa\u672c\u793a\u4f8b\uff1a<\/p>\n

\n$servername = \"localhost\";\n$username = \"username\";\n$password = \"password\";\n$dbname = \"database_name\";\n\n\/\/ \u5275\u5efa\u9023\u63a5\n$conn = new mysqli($servername, $username, $password, $dbname);\n\n\/\/ \u6aa2\u67e5\u9023\u63a5\nif ($conn->connect_error) {\n    die(\"\u9023\u63a5\u5931\u6557: \" . $conn->connect_error);\n}\n<\/code><\/pre>\n
\u7be9\u9078\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n
\u7be9\u9078\u67e5\u8a62\u662f\u6307\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u9019\u901a\u5e38\u901a\u904eSQL\u8a9e\u53e5\u4e2d\u7684WHERE\u5b50\u53e5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u7be9\u9078\u67e5\u8a62\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n
\nSELECT column1, column2 FROM table_name WHERE condition;\n<\/code><\/pre>\n
\u4f7f\u7528PHP\u9032\u884c\u7be9\u9078\u67e5\u8a62<\/h2>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PHP\u9032\u884c\u7be9\u9078\u67e5\u8a62\u7684\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u6839\u64da\u7528\u6236\u7684\u5e74\u9f61\u7be9\u9078\u6578\u64da\uff1a<\/p>\n
\n$age = 25; \/\/ \u7be9\u9078\u689d\u4ef6\n\n$sql = \"SELECT * FROM users WHERE age > ?\";\n$stmt = $conn->prepare($sql);\n$stmt->bind_param(\"i\", $age); \/\/ \"i\"\u8868\u793a\u6574\u6578\u985e\u578b\n$stmt->execute();\n\n$result = $stmt->get_result();\n\nif ($result->num_rows > 0) {\n    \/\/ \u8f38\u51fa\u6578\u64da\n    while($row = $result->fetch_assoc()) {\n        echo \"\u59d3\u540d: \" . $row[\"name\"]. \" - \u5e74\u9f61: \" . $row[\"age\"]. \"
\";\n    }\n} else {\n    echo \"\u6c92\u6709\u7d50\u679c\";\n}\n\n$stmt->close();\n$conn->close();\n<\/code><\/pre>\n
\u4f7f\u7528\u591a\u500b\u689d\u4ef6\u9032\u884c\u7be9\u9078<\/h2>\n
\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u9032\u884c\u7be9\u9078\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728WHERE\u5b50\u53e5\u4e2d\u4f7f\u7528AND\u6216OR\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u6839\u64da\u5e74\u9f61\u548c\u57ce\u5e02\u9032\u884c\u7be9\u9078\uff1a<\/p>\n
\n$age = 25;\n$city = \"Hong Kong\";\n\n$sql = \"SELECT * FROM users WHERE age > ? AND city = ?\";\n$stmt = $conn->prepare($sql);\n$stmt->bind_param(\"is\", $age, $city); \/\/ \"i\"\u8868\u793a\u6574\u6578\uff0c\"s\"\u8868\u793a\u5b57\u7b26\u4e32\n$stmt->execute();\n\n$result = $stmt->get_result();\n\nif ($result->num_rows > 0) {\n    while($row = $result->fetch_assoc()) {\n        echo \"\u59d3\u540d: \" . $row[\"name\"]. \" - \u5e74\u9f61: \" . $row[\"age\"]. \" - \u57ce\u5e02: \" . $row[\"city\"]. \"
\";\n    }\n} else {\n    echo \"\u6c92\u6709\u7d50\u679c\";\n}\n\n$stmt->close();\n$conn->close();\n<\/code><\/pre>\n
\u9632\u6b62SQL\u6ce8\u5165<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u6642\uff0c\u9632\u6b62SQL\u6ce8\u5165\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\uff08prepared statements\uff09\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u9019\u7a2e\u653b\u64ca\u3002\u4e0a\u8ff0\u793a\u4f8b\u4e2d\u5df2\u7d93\u4f7f\u7528\u4e86\u9810\u8655\u7406\u8a9e\u53e5\uff0c\u9019\u662f\u4fdd\u8b77\u6578\u64da\u5eab\u5b89\u5168\u7684\u4e00\u7a2e\u6709\u6548\u65b9\u6cd5\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u901a\u904e\u672c\u6587\u7684\u4ecb\u7d39\uff0c\u6211\u5011\u4e86\u89e3\u4e86\u5982\u4f55\u4f7f\u7528PHP\u5be6\u73fe\u6578\u64da\u5eab\u7684\u7be9\u9078\u67e5\u8a62\uff0c\u5305\u62ec\u57fa\u672c\u7684\u9023\u63a5\u3001\u67e5\u8a62\u8a9e\u6cd5\u4ee5\u53ca\u9632\u6b62SQL\u6ce8\u5165\u7684\u63aa\u65bd\u3002\u9019\u4e9b\u6280\u8853\u5c0d\u65bc\u958b\u767c\u5b89\u5168\u4e14\u9ad8\u6548\u7684\u7db2\u7d61\u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u652f\u6301\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u6258\u7ba1\u60a8\u7684\u61c9\u7528\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u548c\u9ad8\u6548\u5b58\u53d6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528PHP\u5be6\u73fe\u6578\u64da\u5eab\u7be9\u9078\u67e5\u8a62\uff0c\u8f15\u9b06\u8b80\u53d6\u548c\u904e\u6ffe\u6578\u64da\uff0c\u63d0\u5347\u7db2\u7ad9\u6027\u80fd\u8207\u7528\u6236\u9ad4\u9a57\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-96606","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96606","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=96606"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96606\/revisions"}],"predecessor-version":[{"id":96607,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96606\/revisions\/96607"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}