Query working in PHPMyAdmin but not in PHP - php

Question

I am new to PHP and I have taken up an online tutorial, till now I had been working fine but now my database is not returning the query, though when I go to PHPmyadmin there I can get the query working fine.
Following is the code
<?php
ob_start();
//Delete Item question to admin and delete product
include"../storescripts/connect_to_mysql.php";
if (isset($_GET['deleteid'])) {
echo 'Do you really want to delete the item with ID '.$_GET['deleteid'].'?Yes|No';
exit();
}
if(isset($_GET['yesdelete'])){
// Delete the actual product and delete picture also
//delete from database
//$id_to_delete = $_GET['yesdelete'];
//echo $id_to_delete;
$sql =mysqli_query( "DELETE * FROM `products` WHERE `id`=2 LIMIT1 ");
//mysql_query("DELETE * FROM `products` WHERE `id`='$id_to_delete'LIMIT1") or (mysql_error());
//mysqli_query("DELETE * FROM products WHERE id=`$id_to_delete`LIMIT1");// or (mysql_error());
//Unlink file from server
$pictodelete=("../inventory_images/$id_to_delete");
//echo $pictodelete;
if(file_exists($pictodelete)){
unlink($pictodelete);
}
header("location:inventory_list.php");
exit();
}
?>
I would really appreciate the help, my server reads PHP Extension :mysqli .

Answer 1

i dont know what is inside connect_to_mysql.php but at first there is a procedure to connect to a database which i am assuming that you have done correctly, it consist of code which looks something like that at default settings
<?php
$servername = "localhost";
$username = "root";
$password = "";
$databasename="abc";
// Create connection
$conn = mysqli_connect($servername, $username, $password,$databasename);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully";
?>
the second things i see in your code
$sql =mysqli_query( "DELETE * FROM `products` WHERE `id`=2 LIMIT1 ");
it contains syntax errors,it should be
$sql =mysqli_query( $conn,"DELETE FROM `products` WHERE `id`=2 LIMIT 1 ");

Answer 2

A space after Limit.
You have not specified the connection in mysqli_query() function.
eg:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Perform queries
mysqli_query($con,"SELECT * FROM Persons");
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
mysqli_close($con);
?>
In your case
$sql =mysqli_query( $connectionname,"DELETE * FROM `products` WHERE `id`=2 LIMIT 1 ");

Answer 3

Error at query : $sql =mysqli_query( "DELETE * FROM products WHERE id=2 LIMIT1 ");
replace DELETE * FROM products with DELETE FROM products.DELETE delete row from table.
Procedure like mysqli_query takes at least two argument
Link identifier returned form mysqli_connect
Query string
And you haven't specified link as first arguments you should use returned link in to mysqi_query.
$con = mysqli_connect('localhost','root','password','db');
$sql =mysqli_query( $con,"DELETE FROM `products` WHERE `id`=2 LIMIT1 ");
This link helps you link mysqli_query