如何在服务器上调试php post脚本并查看echo输出

Question

newbie question. I have a web page sending $_POST data to a php script on a server. How to debug php (see the output of echo) ? If I just browse to the www.serveradress.com/myscript.php,I see nothing... I am using Chrome.

Thanks

Edit: I am using ngFileUpload on the client side. Edit: I see that the file is well received because I see it on the server with filezilla.

client side:

$scope.uploadBoardPic = function(file, errFiles) {
    $scope.boardPic = file;
    $scope.errFile = errFiles && errFiles[0];
    if (file) {
        file.upload = Upload.upload({
            url: 'http://myserver.com/angular-seed/appendBoardPicture.php',
            method: 'POST',
            data: {file: file}
        });

        file.upload.then(function (response) {
            $timeout(function () {
                file.result = response.data;
            });
        }, function (response) {
            if (response.status > 0)
                $scope.errorMsg = response.status + ': ' + response.data;
        }, function (evt) {
            file.progress = Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
        });
    }   
}

server side:

<?php
$filename = $_FILES['file']['name'];
$destination = './' . $filename;
move_uploaded_file( $_FILES['file']['tmp_name'] , $destination );

echo "<pre>" . print_r($_FILES, true) . "</pre>";
?>

Answer 1

Php keeps POST variables within the $_POST global. You should be able to run something to the affect of

echo "<pre>" . print_r($_POST, true) . "</pre>";

To get back the debugging information you need. This of course will only work if you are doing a valid POST via a form. That meaning that the page is actually going to change. Looking at your question though, it looks like you are working in all javascript for your post/reply. In that case, you will want to look for the reply information from php, within your javascript. You can do this by looking at the network tab, during the submission.

Answer 2

As a good practice, you should use error logs for this kind of task. If you have not set up a error log then you should set it up in the apache config file.

Once you set the error log simply type this:

error_log(var_export($_POST, true));

and you can see the exports in your error log.

http://php.net/manual/en/function.error-log.php