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POIn PHP, is there a function that returns an array made up of the value of a key from an array of associative arrays?
 

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  1. POIn PHP, is there a function that returns an array made up of the value of a key from an array of associative arrays?
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    <p>I'm sure this question has been asked before, my apologies for not finding it first.</p> <p>The original array:</p> <pre><code>[0] =&gt; Array ( [categoryId] =&gt; 1 [eventId] =&gt; 2 [eventName] =&gt; 3 [vendorName] =&gt; 4 ) [1] =&gt; Array ( [categoryId] =&gt; 5 [eventId] =&gt; 6 [eventName] =&gt; 7 [vendorName] =&gt; 8 ) [2] =&gt; Array ( [categoryId] =&gt; 9 [eventId] =&gt; 10 [eventName] =&gt; 11 [vendorName] =&gt; 12 ) </code></pre> <p>My hoped for result out of: print_r(get_values_from_a_key_in_arrays('categoryId', $array));</p> <pre><code>[0] =&gt; 1 [1] =&gt; 5 [2] =&gt; 9 </code></pre> <p>I'm just looking for something cleaner than writing my own foreach based function. If foreach is the answer, I already have that in place.</p> <p><strong>Edit:</strong> I don't want to use a hard-coded key, I was just showing an example call to the solution. Thanks! ^_^</p> <p><strong>Quick Grab Solution for PHP 5.3:</strong></p> <pre><code>private function pluck($key, $data) { return array_reduce($data, function($result, $array) use($key) { isset($array[$key]) &amp;&amp; $result[] = $array[$key]; return $result; }, array()); } </code></pre>
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    1. COThis is known as `plucking`, and is not a default PHP function. You can easily write it yourself though.
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    2. COReally cool. I've done this before, but I never knew that the technical name for it was `plucking`.
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