PHPExcel not filling up rows - php

Question

This is my code using PHPExcel and NinjaForms. Basically the code does go inside if( isset($sub[$field_key]) ){ so all data is OK. I have also echoed it but somehow the rows are empty.
public function export_file( $form_id ) {
// set xls always on
$use_xls = true;
// set save dir
$upload_dir = wp_upload_dir();
$tmp_file = $upload_dir['basedir'] . '/test/' . $form_id . '/form-submissions-'. $form_id .'.xls';;
$sub_results = $this->get_submissions( $form_id );
$num_submissions = $this->count_submissions($form_id );
$fields_meta = Ninja_Forms()->form($form_id)->get_fields();
$field_names=array();
$header_row=array();
$header_row['id'] = __('ID','ninja-forms-spreadsheet');
$header_row['date_submitted'] = __('Submission date','ninja-forms-spreadsheet');
foreach($fields_meta as $field_id => $field){
$field_settings = $field->get_settings();
// skip save fields
if( $field_settings['type'] == 'save' || $field_settings['type'] == 'submit' ) {
unset( $fields_meta[$field_id] );
continue;
}
$field_names[$field_id] = sanitize_title( $field_settings['label'].'-'.$field_id );
$field_types[$field_id] = $field_settings['type'];
$header_row[$field_id] = $field_settings['label'];
}
//die();
require_once( plugin_dir_path( __DIR__ ).'/ninja-forms-excel-export/includes/PHPExcel.php');
$objPHPExcel = new PHPExcel();
$row_number = 1;
// this should be the same wordpress uses and therefore be the saver choice
PHPExcel_Shared_File::setUseUploadTempDirectory( true );
// Table Headline
$col_index = 0;
foreach ($header_row as $headline) {
$col = PHPExcel_Cell::stringFromColumnIndex( $col_index );
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValue( $headline );
$objPHPExcel->getActiveSheet()->getStyle($col.$row_number)->getFont()->setBold(true);
$col_index++;
}
$objPHPExcel->getActiveSheet()->freezePane( "A2" );
$row_number++;
/*
* Loop over each sub
*/
foreach($sub_results as $sub){
$col = 'A';
$objPHPExcel->getActiveSheet()->getCell($col++.$row_number)->setValueExplicit( $sub['_seq_num'], PHPExcel_Cell_DataType::TYPE_NUMERIC );
$objPHPExcel->getActiveSheet()->getCell($col++.$row_number)->setValueExplicit( $sub['date_submitted'] );
$col_index = 0;
foreach ($fields_meta as $field_id => $field) {
$field_key = '_field_'.$field_id;
if( isset($sub[$field_key]) ){
$field_value = $sub[$field_key];
$col = PHPExcel_Cell::stringFromColumnIndex( 2+$col_index );
$field_value = maybe_unserialize( $field_value );
echo $field_types[$field_id] . ' ';
if( in_array($field_types[$field_id], array( 'shipping', 'total', 'number' ) ) ){ // float values
$objPHPExcel->getActiveSheet()->getCell($col.$row_number) ->setValueExplicit( $field_value, PHPExcel_Cell_DataType::TYPE_NUMERIC );
$objPHPExcel->getActiveSheet()->getStyle($col.$row_number)
->getNumberFormat()
->setFormatCode('#,##');
}elseif( in_array($field_types[$field_id], array( 'starrating', 'quantity' ) ) ){ // integer values
$objPHPExcel->getActiveSheet()->getCell($col.$row_number) ->setValueExplicit( $field_value, PHPExcel_Cell_DataType::TYPE_NUMERIC );
$objPHPExcel->getActiveSheet()->getStyle($col.$row_number)
->getNumberFormat()
->setFormatCode('#');
}elseif( in_array($field_types[$field_id], array( 'checkbox' ) ) || strpos($field_types[$field_id], '-optin') ){
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValueExplicit( $field_value, PHPExcel_Cell_DataType::TYPE_STRING );
}elseif( in_array($field_types[$field_id], array( 'listcheckbox' ) ) ){
$field_output = $field_value;
if( is_array($field_value) ){
$field_output = '';
foreach ($field_value as $key => $value) {
if( $field_output == '' )
$field_output = $value;
else
$field_output .= ', ' . $value;
}
}
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValueExplicit( htmlspecialchars_decode ( $field_output,ENT_QUOTES ), PHPExcel_Cell_DataType::TYPE_STRING );
}elseif( $field_types[$field_id] == 'file_upload' ){
if( is_array($field_value)){
$field_value = implode("\n", $field_value);
}
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValueExplicit( htmlspecialchars_decode ( $field_value,ENT_QUOTES ), PHPExcel_Cell_DataType::TYPE_STRING );
$objPHPExcel->getActiveSheet()->getStyle($col.$row_number)
->getAlignment()
->setWrapText(true);
}elseif( $field_types[$field_id] == 'textarea' ){
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValueExplicit( htmlspecialchars_decode ( $field_value,ENT_QUOTES ), PHPExcel_Cell_DataType::TYPE_STRING );
$objPHPExcel->getActiveSheet()->getStyle($col.$row_number)
->getAlignment()
->setWrapText(true);
}else{
if( is_array($field_value) ){
$field_value = implode('; ', $field_value);
}
$objPHPExcel->getActiveSheet()->getCell($col.$row_number)->setValueExplicit( htmlspecialchars_decode ( $field_value,ENT_QUOTES ), PHPExcel_Cell_DataType::TYPE_STRING );
}
}
$col_index++;
}
$row_number++;
}
$objWriter = new PHPExcel_Writer_Excel5($objPHPExcel);
ob_end_clean();
$objWriter->save($tmp_file);
}
The excel modified time is updated correctly but all rows are empty except the first header row in bold. I am not sure what is the issue.
Any help is appreciated.