标签：
1.链接数据库的报错
http://php.net/manual/zh/mysqli.connect-error.php
2.sql 注入问题
http://stackoverflow.com/questions/60174/how-can-i-prevent-sql-injection-in-php
<?php
$mysqli = new mysqli("server", "username", "password", "database_name");
// TODO - Check that connection was successful.
$unsafe_variable = $_POST["user-input"];
$stmt = $mysqli->prepare("INSERT INTO table (column) VALUES (?)");
// TODO check that $stmt creation succeeded
// "s" means the database expects a string
$stmt->bind_param("s", $unsafe_variable);
$stmt->execute();
$stmt->close();
$mysqli->close();
?>
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原文地址：http://www.cnblogs.com/wz0107/p/5435867.html
