SQL Delete statement not working - php

Question

include_once 'dbfunction.php';
getDbConnect();
mysqli_query("DELETE FROM crewlist WHERE id = $_GET[crew_id]") or die (mysqli_error());
echo 'Delete success';
header ('Location: crewlisting.php');
This code doesn't work, however when I replace the crew_id with the actual primary key via hard coding the delete function works

Answer 1

Use this (MySQLi Procedural)
In dbfunction.php should be
<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn)
{
die("Connection failed: " . mysqli_connect_error());
}
?>
and insert page should be
<?
include ("dbfunction.php"); //include db connection
$id = $_REQUEST['crew_id'];
$sql = "DELETE FROM crewlist WHERE id = '$id' ";
if (mysqli_query($conn, $sql))
{
echo "Record deleted successfully";
}
else
{
echo "Error deleting record: " . mysqli_error($conn);
}
mysqli_close($conn);
?>
Errors are
There is no function define in getDbConnect()
If you are confusing with 'and " then split the functions
$id = $_REQUEST['crew_id'];
$sql = "DELETE FROM crewlist WHERE id = '$id' ";
Use mysqli_query and mysqli_error in correct format
and error in mysqli_query, You are not passing connection to MySQLi
When ever database part is Finished, Close connection mysqli_close($conn);

Answer 2

Correct your query:
mysqli_query("DELETE FROM crewlist WHERE id ='".$_GET['crew_id']."'") or die('Error: ' . mysqli_error());