[英]Not able to insert values into Database using oop concept in php
dbclass.php dbclass.php
<?php
class DB{
public static function connect(){
$conn = mysqli_connect("localhost","root","yash","sample");
return $conn;
}
}
$dbb = new DB;
$dbb->connect();
?>
classone.php classone.php
<?php
include('dbclass.php');
class Books {
private $title;
private $price;
private $conn;
function __construct($title,$price){
$this->title = $title;
$this->price = $price;
}
function getDetails(){
echo $this->title."</br>";
echo $this->price;
}
public function insertbook(){
$conn = DB::connect();
$q1 = "INSERT INTO sbook (title,price) VALUES ($this->title,$this->price)";
$run = mysqli_query($conn,$q1);
}
}
$physics = new Books("physics",20);
$physics->getDetails();
$physics->insertbook();
?>
Even after passing the $conn
variable in mysqli_query
, I'm not able to insert values in the database. 即使在
mysqli_query
传递了$conn
变量后,我也无法在数据库中插入值。 Cannot able to figure out, what's happening. 无法确定发生了什么事。
You should have to prepare your SQL query with quotes as below 您必须准备带引号的SQL查询,如下所示
$q1 = "INSERT INTO sbook (title,price) VALUES ('$this->title','$this->price')";
Also you should use your private class member $conn
as $this->conn
. 另外,您应该将私有类成员
$conn
用作$this->conn
。
$this->conn = DB::connect();
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