Filter large PHP array

Question

This data is return from Flickr API. It contains 1000 arrays with photo details. The array is given below...

I want to filter array only containing latitude for that I write this program...

function onlyLatLng($items)
{
    $filters = array();

    foreach ($items as $item) {
        if (!in_array($item['latitude'], array('0', '', 'NULL'))) {
            $filters[] = $item;
        }
    }
    return $filters;
}

$latlngs = onlyLatLng($above_big_array);

Is this right way to do? or there is better way to filter the array? Thanks in advance.

This is fine. It can also be done with array_filter() and a callback similar to what you used in your loop. They will be comparably performant. Your method is clear and readable so I would probably stick with it. — Michael Berkowski
– Michael Berkowski, Commented Feb 2, 2013 at 17:58
J A, I have no problem with output, it is correct. but just want to know if there is better way to filter. — Madan Sapkota
– Madan Sapkota, Commented Feb 2, 2013 at 17:59
You're actually checking if the latitude key contains the string value "NULL", which is probably not what you mean to do. — lanzz
– lanzz, Commented Feb 2, 2013 at 18:01

cdmckay · Accepted Answer · 2013-02-02 18:00:58Z

1

You could use the array_filter function:

$latlngs = array_filter($items, function ($item) {
    return !in_array($item['latitude'], array('0', '', 'NULL')));
});

answered Feb 2, 2013 at 18:00

cdmckay

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1 Comment

Michael Berkowski Over a year ago

empty() should be usable, except if the 'NULL' string is really intended as a string.

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