将javascript函数的结果发送给PHP

Question

I'm trying to get the results of a javascript function to send to a PHP file.So I can use it as a PHP variable.

This is the function that I want to use in the PHP file:

function password()
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < 5; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;


}

This is a Prototype (so I'm not worried about security risks)

Thanks.

UPDATE: Could someone please show me how a could submit this as a form?

Answer 1

You can use AJAX to send your value in php! :)

function password(){
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < 5; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;


}

var xhr = new XMLHttpRequest();
xhr.open('POST', 'http://www.yourSite.com/ajax.php');
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.addEventListener('readystatechange', function() {
            if (xhr.readyState === 4 && && xhr.status === 200) { 

                console.log(xhr.responseText);
            }
        }, false);
xhr.send('text=' + password());

Post send a data via form, so, we should add a content-type:

xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

Then in your php code: Just do this:

<?php echo $_POST['text']; ?>