Php doesn't support new versions of 'mysql' codes. Therefore, mysqli and PDO are recommended. I encountered this error while editing php 5 to 7 mysql>mysqli codes and I couldn't fix the problem. Where is your problem?
Error Message: Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, null given in
The system can't be logged on due to an error.
<?php
ob_start();
session_start();
define('DIR_APPLICATION', str_replace('\'', '/', realpath(dirname(__FILE__))) . '/');
if(!file_exists("config.php")){
header("Location: install/index.php");
die();
}
include(DIR_APPLICATION."config.php");
$msg = 'none';
$sql = '';
if(isset($_POST['username']) && $_POST['username'] != '' && isset($_POST['password']) && $_POST['password'] != ''){
if($_POST['ddlLoginType'] == '1'){
$sql= mysqli_query($link, "SELECT *,b.branch_name FROM tbl_add_admin aa left join tblbranch b on b.branch_id = aa.branch_id WHERE aa.email = '".make_safe($_POST['username'])."' and aa.password = '".make_safe($_POST['password'])."'");
}
if($_POST['ddlLoginType'] == '2'){
$sql= mysqli_query($link,"SELECT *,b.branch_name FROM tbl_add_owner o left join tblbranch b on b.branch_id = o.branch_id WHERE o.o_email = '".make_safe($_POST['username'])."' and o.o_password = '".make_safe($_POST['password'])."'");
}
if($_POST['ddlLoginType'] == '3'){
$sql= mysqli_query($link,"SELECT *,b.branch_name FROM tbl_add_employee e left join tblbranch b on b.branch_id = e.branch_id WHERE e.e_email = '".make_safe($_POST['username'])."' and e.e_password = '".make_safe($_POST['password'])."'");
}
if($_POST['ddlLoginType'] == '4'){
$sql= mysqli_query($link,"SELECT *,b.branch_name FROM tbl_add_rent ad left join tblbranch b on b.branch_id = ad.branch_id WHERE ad.r_email = '".make_safe($_POST['username'])."' and ad.r_password = '".make_safe($_POST['password'])."'");
}
if($_POST['ddlLoginType'] == '5'){
$sql=mysqli_query($link,"SELECT *,(select branch_name from tblbranch where branch_id = $_POST[ddlBranch]) as branch_name FROM tblsuper_admin WHERE email = '".make_safe($_POST['username'])."' and password = '".make_safe($_POST['password'])."'");
}
if($row = mysqli_fetch_array($sql)){
//here success
if($_POST['ddlLoginType'] == '5'){
$arr = array(
'user_id' => $row['user_id'],
'name' => $row['name'],
'email' => $row['email'],
'password' => $row['password'],
'branch_id' => $_POST['ddlBranch'],
'branch_name' => $row['branch_name'],
'added_date' => $row['added_date']
);
$_SESSION['objLogin'] = $arr;
}
else{
$_SESSION['objLogin'] = $row;
}
$_SESSION['login_type'] = $_POST['ddlLoginType'];
if($_POST['ddlLoginType'] == '1' || $_POST['ddlLoginType'] == '5'){
header("Location: dashboard.php");
die();
}
else if($_POST['ddlLoginType'] == '2'){
header("Location: o_dashboard.php");
die();
}
else if($_POST['ddlLoginType'] == '3'){
header("Location: e_dashboard.php");
die();
}
else if($_POST['ddlLoginType'] == '4'){
header("Location: t_dashboard.php");
die();
}
}
else{
$msg = 'block';
}
}
function make_safe($variable)
{
$variable = strip_tags(mysqli_real_escape_string($link, trim($variable)));
return $variable;
}
?>