$.ajax( type: “POST” POST 方法到 php

Question

I'm trying to use the POST method in jQuery to make a data request. So this is the code in the html page:

<form>
Title : <input type="text" size="40" name="title"/>
<input type="button" onclick="headingSearch(this.form)" value="Submit"/><br /><br />
</form>
<script type="text/javascript">
function headingSearch(f)
{
    var title=f.title.value;
    $.ajax({
      type: "POST",
      url: "edit.php",
      data: {title:title} ,
      success: function(data) {
        $('.center').html(data); 
      }
    });
}
</script>

And this is the php code on the server :

<?php

$title = $_POST['title'];
if($title != "")
{
    echo $title;
}

?>

The POST request is not made at all and I have no idea why. The files are in the same folder in the wamp www folder so at least the url isn't wrong.

Answer 1

You need to use data: {title: title} to POST it correctly.

In the PHP code you need to echo the value instead of return ing it.

Answer 2

Check whether title has any value or not. If not, then retrive the value using Id.

<form>
Title : <input type="text" id="title" size="40" name="title" value = ''/>
<input type="button" onclick="headingSearch(this.form)" value="Submit"/><br /><br />
</form>
<script type="text/javascript">
function headingSearch(f)
{
    var title=jQuery('#title').val();
    $.ajax({
      type: "POST",
      url: "edit.php",
      data: {title:title} ,
      success: function(data) {
    $('.center').html(data); 
}
});
}
</script>

Try this code.

In php code, use echo instead of return . Only then, javascript data will have its value.

Answer 3

try this

$(document).on("submit", "#form-data", function(e){
    e.preventDefault()
    $.ajax({
        url: "edit.php",
        method: "POST",
        data: new FormData(this),
        contentType: false,
        processData: false,
        success: function(data){
            $('.center').html(data); 
        }
    })
})

in the form the button needs to be type="submit"

Answer 4

Id advice you to use a bit simplier method -

$.post('edit.php', {title: $('input[name="title"]').val() }, function(resp){
    alert(resp);
});

try this one, I just feels its syntax is simplier than the $.ajax's one...

Answer 5

function signIn()
{
    var Username = document.getElementById("Username").value;
    var Password = document.getElementById("Password").value;

    $.ajax({
        type: 'POST',
        url: "auth_loginCode.jsp",
        data: {Username: Username, Password: Password},
        success: function (data) {
            alert(data.trim());
            window.location.reload();
        }
    });
}

Answer 6

contentType: 'application/x-www-form-urlencoded'