PHP到JS的JSONP数据

Question

I'm using JSONP to dynamically add data into my Android Phonegap app. Since Phonegap 2.5 (and upwards) allows application cache, I would like to use that. Only problem is that at this moment, my data is in a php-file. I read that data from a php-file cannot be cached by the cache manifest, so I'm thinking about changing it to js or something. Any idea how I would do this? I already tried a lot of tutorials on JSONP, but the only way I can get JSONP to work is in PHP. They are also quite vague about how I should save my data file (currently called home.php).

home.php

<?php echo $_GET["callback"] ?> (
[
    {
    "expo":"pit",
    "datum":"05.06.2011 - 05.06.2016",
    "img":"images/pit_home.jpg",
    "link":"exp1_index.html"
    },
    {
    "expo":"Space Odessy 2.0",
    "datum":"17.02 - 19.05.2013",
    "img":"images/so_home.jpg",
    "link":"exp2_index.html"
    }
]
);

script in index.html that calls data from home.php

<script type="text/javascript">
$.ajax({
type: 'GET',
jsonpCallback: 'jsonCallback',
contentType: 'application/json',
dataType: 'jsonp',
url: 'http://mllsdemode.be/Ex-cache/home.php',
success: function(json) {
var $home = $("#home");
$home.empty();
$.each(json, function(i, el) {
    $home.append("<td><a href=" + el.link + " data-ajax='false'><img src=" + el.img + "><div class='dsc'>" + el.expo + "<br><em>" + el.datum + "</em></div></a></td>");
});
},
error: function() { alert("Error reading jsonP file"); }
});
</script>

Answer 1

Well, if I understood well, this is cached, you want it to be cached but not to develop? Then add some headers to develop!

header('Cache-Control: no-cache, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Content-type: application/json');

To easily forge your JSON, you can use Simple JSON for PHP, it allows you to build complex JSON/JSONP.