How to Efficiently Extract a Specific Column from a Multidimensional Array in PHP?

How to Extract a 'Column' from an Array in PHP

In PHP, extracting specific values from multidimensional arrays can be a common task. Consider the following scenario where you have an array of arrays, as shown below:

array(array('page' => 'page1', 'name' => 'pagename1'),
      array('page' => 'page2', 'name' => 'pagename2'),
      array('page' => 'page3', 'name' => 'pagename3'))

You might want to extract the values of the 'name' key from each sub-array, giving you the following result:

array('pagename1', 'pagename2', 'pagename3')

array_column() Function (PHP 5.5 )

Introducing the powerful array_column() function, which simplifies this task significantly. For PHP versions 5.5 and above, array_column() is your go-to solution:

$samples = array(
            array('page' => 'page1', 'name' => 'pagename1'),
            array('page' => 'page2', 'name' => 'pagename2'),
            array('page' => 'page3', 'name' => 'pagename3')
            );
$names = array_column($samples, 'name');
print_r($names);

The above code will produce the desired result of ['pagename1', 'pagename2', 'pagename3'].

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