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<?php
$pdo = new PDO('mysql:dbname=php', 'root', 'root');
// 2. 准备SQL语句,创建预处理对象
$sql = 'INSERT INTO `staff` (`name`, `age`, `sex`, `position`, `mobile`, `hiredate`) ';
$sql .= ' VALUES (:name, :age, :sex, :position, :mobile, :hiredate)';
//echo $sql;exit;
$stmt=$pdo->prepare($sql);
//预加载SQL语句
// 按之前做法, 应该先创建6个变量,然后逐一绑定到SQL语句占位符上
$stmt->bindParam('name', $name, PDO::PARAM_STR, 20);
$stmt->bindParam('age', $age, PDO::PARAM_INT);
$stmt->bindParam('sex', $sex, PDO::PARAM_INT);
$stmt->bindParam('position', $position, PDO::PARAM_STR,20);
$stmt->bindParam('mobile', $mobile, PDO::PARAM_STR, 11);
$stmt->bindParam('hiredate', $hiredate, PDO::PARAM_INT);
$stmt->execute();
$key = ['name', 'age', 'sex', 'position', 'mobile', 'hiredate'];
$value = ['蔡成功', 42, 1, '大风厂长', '1358999321', time()];
$data = array_combine($key,$value);
$stmt->execute($data);
print_r($stmt);
if($stmt ->rowCount()>0){
echo '成功插入一条数据'.$stmt->rowCount().'条记录';
}else{
echo'插入失败';
}
$pdo=null;
?>点击 "运行实例" 按钮查看在线实例
<?php
$pdo= new PDO('mysql:dbname=php','root','root');
$sql1='select * from `staff` where `id`= 5';
$result = $pdo->prepare($sql1);
$r=$result->execute();
if($result->rowCount()==0){
echo "没有此记录";
//exit;
return;
}
$sql ='delete from `staff` where `id` = :id';
$stmt=$pdo->prepare($sql);
if($stmt->execute(['id'=>5])){
//var_dump($stmt->rowCount());exit;
if($stmt->rowCount()>0){
echo'您已删除一条数据'.$stmt->rowCount().'条记录';
}else{
echo '删除失败';
}
}else{
echo print_r($stmt->errorInfo(),true);
}
?>点击 "运行实例" 按钮查看在线实例
<?php
$pdo= new PDO('mysql:dbname=php','root','root');//连接数据库
$sql='UPDATE `staff` SET `position` = :position WHERE `id`=:id';
$stmt = $pdo->prepare($sql);
$stmt->bindValue('position', '文化馆长', PDO::PARAM_STR);
$stmt->bindValue('id', 16, PDO::PARAM_INT);
$stmt->execute();
if($stmt->rowCount()>0){
echo '成功更改'.$stmt->rowCount().'条记录';
}else{
echo '更改失败';
}
$pdo=null;
?>点击 "运行实例" 按钮查看在线实例
<?php
$pdo = new PDO('mysql:dbname=php', 'root', 'root');
// 2. 准备SQL语句,创建预处理对象
$stmt = $pdo->prepare('SELECT * FROM `staff` WHERE `age`>:age');
// 3. 执行SQL语句
$stmt->execute(['age'=>45]);
// 4. 处理结果
// 查看记录数量
// echo '记录数量: ', $stmt->rowCount();
//判断结果集 如果结果集 执行遍历
if($stmt->rowCount()>0){
$stmt = $pdo->prepare('SELECT * FROM `staff` WHERE `age`>:age ORDER BY id ASC');
$stmt->execute(['age'=>45]);
$xx='';
foreach($stmt->fetchAll(PDO::FETCH_ASSOC) as $row){
echo '<li>'.$row['id'].'---'.$row['name'].'---'.$row['sex'].'---'.$row['position'].'---'.$row['mobile'].'</li><br>';
}
}
?>点击 "运行实例" 按钮查看在线实例
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