Save Experiment Script Saves any HTTP post data sent to the script to a local CSV file. Do NOT use this in production. It's hideously insecure. The directory where the results file is saved requires 'other writeable' (o+w) permissions.

save_experiment.php

<?php
	/* save_experiment.php
	 * Created by James Mardell <james.mardell@imperial.ac.uk>
	 * Saves any HTTP post data sent to the script to a local CSV file.
	 * Do NOT use this in production. It's hideously insecure.
	 * The directory where the results file is saved requires 'other writeable' (o+w) permissions.
	 */
	
	// Configuration
	$results_file = 'data.csv';

	function fputcsv($filePointer, $dataArray, $delimiter = ",", $enclosure = "\"")
	// PHP5 includes this function. Code from <boonerunner@hotmail.com> http://php.net/manual/en/function.fputcsv.php#56827
	{
	// Build the string
	$string = "";
	
	// No leading delimiter
	$writeDelimiter = FALSE;

	foreach($dataArray as $dataElement) {
		// Replaces a double quote with two double quotes
		$dataElement=str_replace("\"", "\"\"", $dataElement);
		
		// Adds a delimiter before each field (except the first)
		if($writeDelimiter) $string .= $delimiter;
		
		// Encloses each field with $enclosure and adds it to the string
		$string .= $enclosure . $dataElement . $enclosure;
		
		// Delimiters are used every time except the first.
		$writeDelimiter = TRUE;
	} // end foreach($dataArray as $dataElement)

	// Append new line
	$string .= "\n";
	
	// Write the string to the file
	fwrite($filePointer, $string);
	}
	
	// Variables
	$input = $_POST;
	
	// Check to see if the file already exists, if not: write the header
	if (!is_file($results_file) ) {
		if (!$output = fopen($results_file, 'a') ) {
			echo "Cannot open or create file '$results_file' for writing.";
			exit;
		}
		
		fputcsv($output, array_keys($input) );
		
		fclose($output);
	}
	
	// Write the data
	if (!$output = fopen($results_file, 'a') ) {
		echo "Cannot open or create file '$results_file' for writing.";
		exit;
	}
	
	fputcsv($output, $input);
	
	fclose($output);
	
	echo "Successfully saved your data.";
?>