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POHow to save a file to the server by pressing a button in Javascript
 

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  1. POHow to save a file to the server by pressing a button in Javascript
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    <p>Ok so I'm experimenting with the in HTML5 and have made a simple "paint" application in Javascript to draw where the user's mouse is on the screen. Works fine.</p> <p>I then wanted to save the coordinates to a file. My program already had an array of the x coordinates and an array of the y coordinates from the Javascript code.</p> <p>When the user presses a button, the onClick calls a function in the Javascript, which using jQuery, as in the Top Answer here <a href="https://stackoverflow.com/questions/419240/how-to-get-javascript-function-data-into-php-variable">How to get JavaScript function data into a PHP variable</a> attempts to pass this into a php file to save. </p> <p>However it isn't working. Should I be passing the data back into the original php document that contains the canvas? If so how do I then get it to do the code to save as the PHP is run when the document is loaded no?</p> <p>CODE:</p> <p>Ok this is in the original php file which contains the HTMl for the webpage including the canvas. Here's the relevant save button:</p> <p><code>&lt;button type="button" onclick="saveDrawing()" id="saveButton"&gt;Save&lt;/button&gt;</code></p> <p>This calls the following in a separate JS file</p> <pre><code>function saveDrawing(){ // First check that not drawing and have data if (!readyToDraw &amp;&amp; clickX!=null){ // If ready then pass back to the PHP file the data $url = 'file_save_test.php'; $.get($url, {x_coords: getXCoords(), y_coords: getYCoords()}); } else { alert("Please add some coordinate points and press Finish before saving"); } } </code></pre> <p>and file_save_test.php contains only the following</p> <pre><code>&lt;?php // retrieve data from the JS $buffer_data['x_coords'] = $_GET['x_coords']; $buffer_data['y_coords'] = $_GET['y_coords']; $x_s = $_GET['x_coords']; $y_s = $_GET['y_coords']; // first want to open a file $file_name = "data_test.txt"; $file_handler = fopen($file_name, 'w'); // now to loop through arrays and write! /*for ($i = 0; $i &lt; sizeof($x_s); i++){ fwrite($file_handler, "$x_s[i], "); fwrite($file_handler, "$y_s[i]\n"); } */ fclose($file_handler); ?&gt; </code></pre>
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    1. USStuart Lacy
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    1. COPost some of your code
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      1. POHow to save a file to the server by pressing a button in Javascript
      1. USAaron W.
    2. COPosted code, hope that helps
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      1. POHow to save a file to the server by pressing a button in Javascript
      1. USStuart Lacy
 

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