if else condition not validating for mysql query in php mysql - php

Question

Hi i have a small problem with the execution of query using if else condition.
I have 2 tables i.e dashboard_widget and dashboard_widget_users and in both this table i store my unserialize configuration.Users will always get the configuration from dashboard_widget_users table.But if the configuration is Null then it will take bydefault configuration from dashboard_widget table.I just want to use if else condition and i tried to do so but unable to execute it properly.The condition for if(!empty($empty_config)) is getting satisfied but if it empty then i am not getting any result.Thank you.
dashboard_widget_users table
dashboard_widget table
Here is my php code:
$query = "SELECT dashboard_widget_users.configuration
FROM dashboard_widget_users
INNER JOIN yw_user ON dashboard_widget_users.dsnr_yw_user = yw_user.intern
INNER JOIN dashboard_widget ON dashboard_widget_users.dsnr_dashboard_widget = dashboard_widget.id
WHERE dashboard_widget_users.dsnr_yw_user =10 AND dashboard_widget.id =1 ";
$result = mysql_query($query, $myConnection);
if ($row = mysql_fetch_assoc($result))
{
$empty_config=$row['configuration'];
if (empty($empty_config)) {
$sql="SELECT dashboard_widget.configuration FROM dashboard_widget WHERE Id =1";
$sql_result = mysql_query($sql, $myConnection);
$results = mysql_fetch_assoc($sql_result);
$config= unserialize($results['configuration']);
}
if (!empty($empty_config)) {
$config = unserialize($row['configuration']);
foreach($config as $val)
{
//Here is my further things.....
}
}
}

Answer 1

You should check if there are any rows found, if so, display the information, if not, display the default info:
<?php
$query = "SELECT dashboard_widget_users.configuration
FROM dashboard_widget_users
INNER JOIN yw_user ON dashboard_widget_users.dsnr_yw_user = yw_user.intern
INNER JOIN dashboard_widget ON dashboard_widget_users.dsnr_dashboard_widget = dashboard_widget.id
WHERE dashboard_widget_users.dsnr_yw_user =10 AND dashboard_widget.id =1 ";
$result = mysql_query($query, $myConnection);
if( mysql_num_rows( $result ) > 0 ) {
// row found, display it
}
else {
// row not found, display default
}
?>
Note: you should look into mysqli_* functions, mysql_* functions are deprecated. Also check this link.