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id=\"sql%e7%b7%a8%e7%a8%8b%e4%b8%ad%e7%9a%84%e5%b8%b8%e8%a6%8b%e8%aa%a4%e5%8d%80-PStORVLKSf\">SQL\u7de8\u7a0b\u4e2d\u7684\u5e38\u898b\u8aa4\u5340<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e4%b8%8d%e5%ae%89%e5%85%a8%e7%9a%84sql%e6%9f%a5%e8%a9%a2-PStORVLKSf\">1. \u4f7f\u7528\u4e0d\u5b89\u5168\u7684SQL\u67e5\u8a62<\/h3>\n<p>SQL\u6ce8\u5165\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u5b89\u5168\u6f0f\u6d1e\uff0c\u8a31\u591a\u958b\u767c\u8005\u5728\u7de8\u5bebSQL\u67e5\u8a62\u6642\u672a\u80fd\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\u6216\u9810\u8655\u7406\u8a9e\u53e5\uff0c\u9019\u4f7f\u5f97\u61c9\u7528\u7a0b\u5e8f\u5bb9\u6613\u53d7\u5230\u653b\u64ca\u3002\u70ba\u4e86\u9632\u6b62SQL\u6ce8\u5165\uff0c\u958b\u767c\u8005\u61c9\u59cb\u7d42\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u5728PHP\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528PDO\u4f86\u5b89\u5168\u5730\u57f7\u884cSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>\n$stmt = $pdo-&gt;prepare(\"SELECT * FROM users WHERE username = 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