php multidimensional array rename key not working

Question

I have multidimensional array which looks like this:

Array
(
    [0] => Array
        (
            [banner_link] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg
        )

    [1] => Array
        (
            [banners] => 143038313801.jpg,143038313809.jpg,143038313811.jpg
        )

    [2] => Array
        (
            [banners] => 143038306301.jpg,143038306302.jpg,143038306303.jpeg,143038306310.jpg,143038306311.jpg,143038306312.png
        )

)

Now I want to rename banner_link key to banners.

Array
(
    [0] => Array
        (
            [banners] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg
        )

    [1] => Array
        (
            [banners] => 143038313801.jpg,143038313809.jpg,143038313811.jpg
        )

    [2] => Array
        (
            [banners] => 143038306301.jpg,143038306302.jpg,143038306303.jpeg,143038306310.jpg,143038306311.jpg,143038306312.png
        )

)

I have tried with bellow code but no luck.

foreach ( $getBefamousHomepage as $k=>$v )
{
    $getBefamousHomepage[$k] ['banners'] = $getBefamousHomepage[$k] ['banner_link'];
    unset($getBefamousHomepage[$k]['banner_link']);
}

Getting this errors:

Notice: Undefined index: banner_link in /var/www/sitename/application/views/_templates/global_footer.php on line 14

Notice: Undefined index: banner_link in /var/www/sitename/application/views/_templates/global_footer.php on line 14

Array
(
    [0] => Array
        (
            [banners] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg
        )

    [1] => Array
        (
            [banners] => 
        )

    [2] => Array
        (
            [banners] => 
        )

)

What I am doing wrong any idea?

Thanks.

Please change your title to a single sentence describing your problem. It's not a Google search. — anon
– anon, Commented Apr 30, 2015 at 12:14

Rizier123 · Accepted Answer · 2015-04-30 12:24:08Z

3

banner_link doesn't always exist. Use isset() to see if it exists :

if(isset($getBefamousHomepage[$k]['banner_link'])) {
    $getBefamousHomepage[$k]['banners'] = $getBefamousHomepage[$k]['banner_link'];
    unset($getBefamousHomepage[$k]['banner_link']);
}

edited Apr 30, 2015 at 12:24

Rizier123

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answered Apr 30, 2015 at 12:14

AbraCadaver

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Comments

steven · Accepted Answer · 2015-04-30 12:15:47Z

1

You should check if banner_link exists. And to avoid overwriting banner you should check if banner not already exists.

foreach ( $getBefamousHomepage as $k=>$v ) {    
    if(isset($getBefamousHomepage[$k]['banner_link']) && !isset($getBefamousHomepage[$k]['banners'])) {        
        $getBefamousHomepage[$k]['banners'] = $getBefamousHomepage[$k]['banner_link'];
        unset($getBefamousHomepage[$k]['banner_link']);
    }
}

answered Apr 30, 2015 at 12:15

steven

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1 Comment

Mr.Happy Over a year ago

Excellent!. Working perfect. Thanks.

Blaatpraat · Accepted Answer · 2015-04-30 12:14:51Z

0

Your code is almost good. You just need to add an extra check to see if banner_link exists.
When it does not, it throws a notice (like you see), but the code will still execute, so the "banner" index will be set to null.

Code example:

foreach ( $getBefamousHomepage as $k=>$v )
{
    if (isset($getBefamousHomepage[$k]['banner_link'])) 
    {
        $getBefamousHomepage[$k] ['banners'] = $getBefamousHomepage[$k] ['banner_link'];
        unset($getBefamousHomepage[$k]['banner_link']);
    }
}

answered Apr 30, 2015 at 12:14

Blaatpraat

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Comments

maalls · Accepted Answer · 2015-04-30 12:17:56Z

0

Some element of your array don't have banner_link and it is causing the warning when you try to access it. Try this instead:

if(isset($getBefamousHomepage[$k] ['banner_link'])) {

    $getBefamousHomepage[$k] = array("banners" => $getBefamousHomepage[$k] ['banner_link']);

}

answered Apr 30, 2015 at 12:17

maalls

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