PHP - pushing only key first to an array and adding values later

Question

I have a foreach loop where I go through a collection of contents and I am making an associative array with values from a relationship of contents. This is the code:

    $contentTaxonomies = [];
    foreach($contents as $content) {
        foreach($content->taxonomies as $taxonomy){
            $contentTaxonomies[$content->id][$taxonomy->type->name] = $taxonomy->name;
        }
    }

But, that means if the content doesn't have any taxonomies it won't be in the $contentTaxonomies array, how can I make a loop that when it doesn't have taxonomies, it still gets add to an array just with empty value?

don't you think that when the content will not have taxonomies then the inner foreach will give error? — Himanshu Upadhyay
– Himanshu Upadhyay, Commented Oct 25, 2017 at 13:45

Bartosz Herba · Accepted Answer · 2017-10-25 13:39:05Z

1

You could do something like this:

$contentTaxonomies = [];
foreach($contents as $content) {
    $contentTaxonomies[$content->id] = [];
    foreach($content->taxonomies as $taxonomy){
        $contentTaxonomies[$content->id][$taxonomy->type->name] = $taxonomy->name;
    }
}

Basicaly I initialized empty array as an value for a $content->id key and then eventually populate it with data.

answered Oct 25, 2017 at 13:39

Bartosz Herba

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1 Comment

Leff Over a year ago

Yes, of course, that is what I was looking for, thanks!

Roberto Bisello · Accepted Answer · 2017-10-25 13:39:46Z

0

simply create the array before cycle thorough taxonomies:

$contentTaxonomies = [];
    foreach($contents as $content) {
        $contentTaxonomies[$content->id] = [];
        foreach($content->taxonomies as $taxonomy){
            $contentTaxonomies[$content->id][$taxonomy->type->name] = $taxonomy->name;
        }
    }

answered Oct 25, 2017 at 13:39

Roberto Bisello

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Comments

Himanshu Upadhyay · Accepted Answer · 2017-10-25 13:44:48Z

0

$contentTaxonomies = [];
foreach($contents as $content) {
    $contentTaxonomies[$content->id] = [];
    if(isset($content->taxonomies)){ // This will check if `content` has taxonomies or not. Otherwise it will give error due to for each loop
        foreach($content->taxonomies as $taxonomy){
            $contentTaxonomies[$content->id][$taxonomy->type->name] = $taxonomy->name;
        }
    }
}

answered Oct 25, 2017 at 13:44

Himanshu Upadhyay

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