實例分享PHP操作MySql的增刪改查的方法

<?php 
//造連接對象
$db = new MySQLi("localhost","root","","0710_test");

//寫SQL語句
$sql = "select * from student";
//檢測連接數據庫是否成功，失敗返廻“連接失敗”，竝退出程序 
if(mysqli_connect_error()){
 die("連接失敗"); 
}
//執行SQL語句,返廻結果集對象
$result = $db->query($sql);
var_dump($result->num_rows);
//判斷結果有無數據
if($result->num_rows){
 echo "存在數據";
}
//取數據（查詢語句）
//$arr = $result->fetch_all();//獲取所有數據竝以二維數組存在
//$arr = $result->fetch_all(MYSQLI_ASSOC);//獲取所有數據中的關聯數組
//$arr = $result->fetch_array();

//while循環遍歷數組所有數據
while($arr = $result->fetch_array()){
 var_dump($arr);
}

//$arr = $result->fetch_assoc();//返廻關聯數組
//$arr = $result->fetch_object();//列名對應成員變量
//$arr = $result->fetch_row();//返廻索引數組
//var_dump($arr);
 
//增刪改語句
//添加一條數據(返廻值true或false)
$sql = "insert into student values('102','王某','男','1987-7-1','95033')";
//刪除一條數據(返廻值true或false)
$sql = "delete from student where Sname='李軍'";
$r = $db->query($sql);
var_dump($r);
?>

<?php 
$db = new MySQLi("localhost","root","","0710_info");
if(mysqli_connect_error()){
 die("連接失敗");
}
$sql = "insert into work values(0,'P005','2005-01-01','2010-10-1','山師大','教育部',2)";
if($db->query($sql)){
 echo "添加成功";
 //插入這條數據的id(常用)
 echo $db->insert_id;
}else{
 echo "添加失敗";
}
?>