ethics-canvas/canvas/php/canvas.php

<?php
    // For the ajax post call
    echo 'JSON stringified Object: '.$_POST['JSONstrObj'].' was sent to the php file\n';
    // For the ajax post call in stringified object data form
    $post_data = $_POST['JSONstrObj'];
    $canvas_id_data = $_POST['canvas_id'];
    
    $filename = '../json/'.$canvas_id_data.'.json';
    $handle = fopen($filename, "w");
    
    if(empty($post_data)) {
        echo 'Hmm... I did NOT get any data posted by AJAX.';
    }
    if(!empty($post_data)) {
        echo 'Awesome! Got the JSON info :)';
        //$dir = 'YOUR-SERVER-DIRECTORY/files';
        //$file = uniqid().getmypid();
        //$filename = $dir.$file.'.txt';
        // Write to file
        fwrite($handle, $post_data);
    }
    // Close the file
    fclose($handle);
?>