php+mysqli使用预处理技术进行数据库查询的方法,mysqli预处理
本文实例讲述了php+mysqli使用预处理技术进行数据库查询的方法。分享给大家供大家参考。具体如下:
代码有些难度,需要基础知识比较扎实才能好理解,代码先放上来:
这里实现查询所有 id>5 的 id,title,contents值:
复制代码 代码如下:
$mysqli = new MySQLi("localhost","root","123456","liuyan");
if(!$mysqli){
die($mysqli->error);
}
//创建一个预定义的对象 ?占位
$sql = "select id,title,contents from news where id>?";
$mysqli_stmt = $mysqli->prepare($sql);
$id=10;
//绑定参数
$mysqli_stmt->bind_param("i",$id);
//绑定结果集
$mysqli_stmt->bind_result($id,$title,$contents);
//执行
$mysqli_stmt->execute();
//取出绑定的结果集
while($mysqli_stmt->fetch()){
echo "--$id--$title--$contents--
";
}
//关闭结果集
$mysqli_stmt->free_result();
$mysqli_stmt->close();
$mysqli->close();
?>
希望本文所述对大家的php程序设计有所帮助。

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