depending on condition show error message in php - php

Question

i have code like this
<?php
require('../config.php');
require_once($CFG->dirroot . '/user/editlib.php');
$errorMessage = '';
$successMessage = '';
if(isset($_SESSION['successMessage']))
{
$successMessage = $_SESSION['successMessage'];
unset($_SESSION['successMessage']);
}
if (isset($_POST['register'])) {
if(!preg_match("/^(?=.*[0-9])(?=.*[a-z])(\S+)$/i", $_POST['password']))
{
$errorMessage="don't allow spaces";
}
$errors = array();
$data = array();
$chk_sql = "SELECT * FROM {user} u where username = ?";
if (!empty($chk_sql) ) {
$errorMessage='Username already taken';
}
if(!$chk_username = $DB->get_record_sql($chk_sql, array($_POST['username'])) )
{
$secret = $_POST['secret'];
$access_code_sql = "SELECT * FROM {accesscode} WHERE random_no= ? and status=1";
if($chk_secret = $DB->get_record_sql($access_code_sql, array($secret)) )
{
if ( $chk_secret->used >= $chk_secret->number ) {
$errorMessage = "your access code limit completed..";
}
else
{
$cadminid = $chk_secret->cadmin_id;
$clientid = $chk_secret->clientid;
$DB->execute("UPDATE {accesscode} SET used = used+1 WHERE random_no = '$secret'");
$insert_record = new stdClass();
$insert_record->firstname = $_POST['firstname'];
$insert_record->lastname = $_POST['lastname'];
$insert_record->username = $_POST['username'];
$insert_record->secret = $secret;
$insert_record->password = password_hash($_POST['password'], PASSWORD_DEFAULT);
$insert_record->timecreated = time();
$insert_record->maildigest = $cadminid;
$insert_record->maildisplay = $clientid;
$insert_record->idnumber = 1;
$insert_record->mnethostid = 1;
$insert_record->confirmed = 1;
$insert_record->email = $_POST['email'];
if($result = $DB->insert_record('user', $insert_record))
{
$_SESSION['successMessage'] = "record created successfully";
header('Location: register.php');
}
else
$errorMessage = "error! can you please try again";
}
}
else
$errorMessage = "your access code is wrong..";
}
}
?>
so i want to write condition like another if condition
if ( $chk_secret->status='0' ) {
$errorMessage = "your access code deactivated..";
}
if not they can register
i tried..but i didn't get idea where i have to add that if..
before i have condition like if number>used it will show some error message like your accesscode limit completed
can anyone help me..
thanks in advance..

Answer 1

= is for value assignment
== is compare two operands
so you need to change
if ( $chk_secret->status='0' ) {
to
if ( $chk_secret->status=='0' ) {
UPDATE:
your query SELECT * FROM {accesscode} WHERE random_no= ? and status=1
which means it going to return only status == 1
you can check with number of rows returned is ZERO then through status zero error message.
Or else
Get rows only based on random_no exists and then check status key