Extract a CSV in Gravity Forms and put in a textarea

functions.php

// Change the '9' at the end to the id of your form
 add_action('gform_post_submission_9','pullcsv',10,2);
 function pullcsv($entry, $form){
	//Fields to change
	$file_field = 3;
	$text_field = 4;
	$entry_id = $entry['id'];
	$csv = $entry[$file_field]; //this returns a url string to the uploaded csv
	$row = 1;
	if (!empty($csv)){
		if (($handle = fopen($csv, "r")) !== FALSE) {
			while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
				// $num refers to the number of fields in the line
				// $row is the counter for each line
				$num = count($data);
				$confirmation .= "<p>".$num." fields in line ".$row.": <br /></p>\n";
				$row++;
				for ($c=0; $c < $num; $c++) {
					// $data[$c] refers to the entry in that line at that space
					$confirmation .= $data[$c] . "<br />\n";
				}
			}
			fclose($handle);
		}
	}
	else {$confirmation = 'No CSV';}
	GFAPI::update_entry_field($entry_id,$text_field,$confirmation);
}