saving data from csv to php and mysql - php

Question

I am trying to import all the data from csv to the database.
Below code is ajax request that is sent to a php file.
$('#upload_location_csv').click(function(e){
e.preventDefault();
var queryDict = {};
location.search.substr(1).split("&").forEach(function(item) {queryDict[item.split("=")[0]] = item.split("=")[1]});
fi = document.getElementById("csv_file_input").files[0];
reader = new FileReader;
reader.onload = function(){
csv_data = reader.result;
$.ajax({
type:"post",
url:ajax_root_path+'fend.php',
data:{
location_id:queryDict['id'],
csv_data:csv_data,
perform_action:"save_delivery_csv_data"
},
success:function(resObj){
window.location.reload();
},
error:function(resObj){
}
});
};
reader.readAsText(fi);
});
This is the action that is performed, where here is, save_delivery_csv_data .
When I click on import csv, the page reloads and no request is sent to fend.php.
case 'save_delivery_csv_data':
{
$location_id = $param_array['location_id'];
$csv_data = $param_array['csv_data'];
$csv_data_rows = explode("\n",$csv_data);
unset($csv_data_rows[0]);
$csv_data_rows = array_values($csv_data_rows);
debug($csv_data_rows);
$csv_data_array = array();
foreach ($csv_data_rows as $csv_row_key => $csv_row_value)
{
$csv_row_value_array = explode(",",$csv_row_value);
debug($csv_row_value_array);
if(count($csv_row_value_array) == 5)
{
/*$csv_data_array[$csv_row_key] = array();
$csv_data_array[$csv_row_key]['locality_id'] = $csv_row_value_array[0];
$csv_data_array[$csv_row_key]['locality_name'] = $csv_row_value_array[1];
$csv_data_array[$csv_row_key]['minimum_order_amount'] = $csv_row_value_array[2];
$csv_data_array[$csv_row_key]['delivery_time'] = $csv_row_value_array[3];
$csv_data_array[$csv_row_key]['delivery_charge'] = $csv_row_value_array[4];*/
//debug($csv_row_value_array);
if(isset_empty($csv_row_value_array[3]))
{
//debug($csv_row_value_array);
$locality_id = $csv_row_value_array[0];
$location_outletValues = array();
$location_outletValues['cloud_site_id'] = $cloud_site_id;
$location_outletValues['location_id'] = $location_id;
$location_outletValues['locality_id'] = $locality_id;
$location_outletValues['minimum_order'] = $csv_row_value_array[2];
$location_outletValues['delivery_time'] = $csv_row_value_array[3];
$location_outletValues['delivery_charge'] = $csv_row_value_array[4];
$sql = "SELECT outlet_locality_id FROM ".PLATFORM_OUTLET_LOCALITIES."
WHERE location_id='".$location_id."' AND locality_id='".$locality_id."'";
$outlet_locality_array = $DB->query($sql);
//debug($outlet_locality_array);
if(count($outlet_locality_array) > 0)
{
$condition_array = array();
$condition_array['outlet_locality_id'] = $outlet_locality_array[0]->outlet_locality_id;
//debug($condition_array);
debug($location_outletValues);
$DB->update(PLATFORM_OUTLET_LOCALITIES,$location_outletValues,$condition_array);
}
else
{
$DB->insert(PLATFORM_OUTLET_LOCALITIES,$location_outletValues);
}
}
}
}
break;
//debug($csv_data_array);
}
What am I missing out here?? I also tried debugging variables values, but no request was sent to fend.php, whereas other request on the same page are being successfully sent.