I'm trying to filter my posts with a simple ajax call, but cant get it to work because my admin-ajax.php call always returns 0. There are many issues facing this problem but they are mostly fixed by adding wp_die(), which is not solving my issue.
Ajax Call:
$.ajax({
type: 'POST',
url: '/wp-admin/admin-ajax.php',
dataType: 'html',
data: {
action: 'filter_projects',
},
success: function(res) {
$('.project-tiles').html(res);
console.log(res);
}
})
PHP function:
function filter_projects() {
echo "<p>test</p>";
wp_die();
}
add_action('wp_ajax_filter_projects', 'filter_projects');
add_action('wp_ajax_nopriv_filter_projects', 'filter_projects');
The PHP function is registered correctly as I'm getting a 200 on it, but it's always returning 0 and 'success'.
What I already tried:
I dont know how to debug this any further as it is not returning any errors.
Does anyone have an idea?
instead of echo directly your HTML, try manipulating the results with JSON so you can get better results for evaluating your test. How would I do the same test you posted (using direct JS instead of JQUERY):
let xhr = new XMLHttpRequest();
xhr.open('POST', "/wp-admin/admin-ajax.php", true);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
var params = 'action=filter_projects';
xhr.onreadystatechange = () => {
if(xhr.readyState == 4) {
// RETURN OK
if(xhr.status == 200) {
console.log(xhr.responseText); // TEXT RESPONSE
console.log(JSON.parse(xhr.responseText)); // JSON RESPONSE
// HTTP ERROR
}else{
console.log("SOME ERROR HTTP");
console.log(xhr.responseText);
}
}
};
xhr.send(params);
PHP CODE:
function filter_projects() {
$content = "test";
$data = array('success' => "200", 'content' => $content);
$json_string = json_encode($data, JSON_PRETTY_PRINT);
echo $json_string;
wp_die();
}
add_action('wp_ajax_filter_projects', 'filter_projects');
add_action( 'wp_ajax_nopriv_filter_projects', 'filter_projects' );
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