Javascript post to PHP and get back an array?

Question

So i have this piece of javascript, it posts to foo.php with value val, gets back data, empties the container and call function graph which will fill the container with a new chart.

$.post("foo.php", {val: val}, function(data){
    if(data.length >0) {
        $('#container').html('');
        graph(data);
    } 
});

in foo.php, how do I make it pass back an array instead of string? at the moment I just have an echo in foo.php that echos the data delimited by a comma, ie: 1,2,3,4,5. then in the graph function I have a split(',' data) that creates an array for later use.

I mean, all this works fine, I'm just wondering if I can avoid the split step and have foo.php return an array directly.

thanks!

Community · Accepted Answer · 2017-05-23 12:12:17Z

3

That's what json_encode is for:

echo json_encode( $array );

Just remember to set JSON headers, so that jQuery will know to parse the returned data as JSON. If you don't, you'll have to specify that in your jQuery AJAX call as follows:

$.post("foo.php", {val: val}, function(data){
    if (data.length > 0) {
        $('#container').html('');
        graph(data);
    } 
}, 'json'); // <-- Here you're specifying that it'll return JSON

edited May 23, 2017 at 12:12

CommunityBot

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answered Jan 24, 2013 at 19:11

Joseph Silber

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Hanky Panky · Accepted Answer · 2013-01-24 19:11:56Z

3

json_encode your array in PHP and jquery can easily parse your JSON encoded data.

answered Jan 24, 2013 at 19:11

Hanky Panky

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