CODEWITHSUNDEEP
phpjqueryvariablespost
user4376191
user4376191

Reputation:

Simple jquery post variable sending

I have some problem with this part of a code:

<script>
function komenty(photoid) {
    var xmlhttp=new window.XMLHttpRequest();
    xmlhttp.onreadystatechange=function() {
        if (xmlhttp.readyState==4 && xmlhttp.status==200) {
            var x = xmlhttp.responseText;
            $.post('main.php', {x: "foo"});
        }
    }
    xmlhttp.open("GET", "comments.php?id=" + photoid, true);
    xmlhttp.send();
}
</script>

I am trying to send this variable to my php script on the same page which is main.php The responseText is not empty, there are few strings inside of it. But in my php script it says that "variable x is undefined"

<?php
echo "<a href='#' class='my-button' onclick='komenty(".$photoid.")'>komentarze</a>";
$x = $_POST['x'];
echo $x;
?>

I am not sure if i clearly understand the jquery manuals

Upvotes: 2

Views: 60

Answers (1)

Barmar
Barmar

Reputation: 780724

You should either use a different script for the AJAX call than displaying the main page. Or the main.php script needs to check whether it was called using GET or POST.

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    // Respond to AJAX call
    $x = $_POST['x'];
    echo $x;
} else {
    // Display normal HTML
    echo "<a href='#' class='my-button' onclick='komenty(".$photoid.")'>komentarze</a>";
}

Upvotes: 1

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