PHP数组返回值

Question

I would like to onsubmit, fetch the positioning of all the divs on the page and return the ids of the divs and the absolute positioning values.

This is the result I get in the console of how the array looks: [Object { name="app1", coord="10,10"}, Object { name="app2", coord="60,10"}]

One, am I populating the array correctly? Two, how can I print it and return a string via result?

HTML page:

var apps = $(".block"),
            positions = [];

            $.each(apps, function (index, app) {
                var positionInfo = $(app).position();
                var input = $(this).attr('id');
                var lines = input.split('_');
                var appname = lines[0];

                positions.push({value: appname + "," + positionInfo.top + "," + positionInfo.left});
                console.log(appname + ":" + positionInfo.top + ":" + positionInfo.left);
            });

            $.ajax({
                type:  'post',
                cache:  false ,
                url:  'result_savechange.php',
                data:  {result:positions},
                success: function(resp) {
                    $('#mainCanvas').html(''); // Clear #content div
                    $('#mainCanvas').append(resp);
                } 
            });

PHP page:

<?php 
    $string = '';

    foreach($_POST["result"] as $position){
        $string .= $position['value'];
    }

    echo $string;
?>

Answer 1

There's no reason to use JSON here. It's overkill for this scenario. Just do this:

$.ajax({
    type:  'post',
    cache:  false ,
    url:  'result_savechange.php',
    data:  {result: positions},
    success: function(resp) {
        alert(resp);
    } 
});

Then in PHP, $_POST["result"] will be an array.

foreach($_POST["result"] as $position){
    echo $position['name'];
    echo $position['coord'];
}