How Can I Extract a Specific Column from a Multidimensional Array in PHP?

Extracting Array Columns in PHP

Original Question: Is there a function to extract a 'column' from an array in PHP?

Scenario:

Consider an array of arrays structured as follows:

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

The goal is to obtain a new array that contains only the values of the 'name' keys:

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

Solution:

Since PHP 5.5

PHP 5.5 introduced the array_column() function, which is ideally suited for this task:

$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); // ['pagename1', 'pagename2', 'pagename3']

This code uses array_column() to extract the 'name' column from the $samples array, resulting in the desired output.

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