2015-07-20 02:22 阅读 56


Hey i am using canvas to put an image out and save it. I can not get wordpress to make an ajax request. I keep getting back 0 responseText. I have beeen working on this for days and can't seem to get it to work. My page is

jQuery( document ).on( 'click', '.draw-game', function() {

var testCanvas = document.getElementById("mycanvas");
var canvasData = testCanvas.toDataURL("image/png");
var postData = "canvasData="+canvasData;
var debugConsole= document.getElementById("debugConsole");

url : drawing.ajax_url,
type : 'post',
data : {
action : 'save_the_drawing',
imgBase64: postData,

success : function( response ) {

Here is my JS

And this one is the PHP code

add_action( 'wp_enqueue_scripts', 'drawing_game_enqueue_scripts' );
function drawing_game_enqueue_scripts() {
if( is_page('games') ) {
wp_enqueue_style( 'drawing-game', plugins_url( '/drawing-game.css', __FILE__ ) );
wp_enqueue_script( 'drawing-game', plugins_url( '/drawing-game.js', __FILE__ ), array('jquery'), '1.0', true );
wp_localize_script( 'drawing-game', 'drawing', array(
'ajax_url' => admin_url( 'admin-ajax.php' )

add_action( 'wp_ajax_nopriv_save_the_drawing', 'save_the_drawing' );
add_action( 'wp_ajax_save_the_drawing', 'save_the_drawing' );
function save_the_drawing() {

$img = $_POST['postData'];
$img = str_replace('data:image/png;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$fileData = base64_decode($img);
$fileName = 'photo.png';
file_put_contents($fileName, $fileData);


I keep only getting back a 0 and its driving me crazy! Please Help. Thanks!

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1条回答 默认 最新

  • 已采纳
    dsjswclzh40259075 dsjswclzh40259075 2015-07-20 05:51

    You need to call die() at the end of your script. Simply returning or echoing will not suffice.

    WordPress by default returns 0 as a return code (0 being no errors detected) if you do not specify a return value (by calling die())

    Here's some additional details, and there's more in the WP Codex:

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