PHP array_column() function

It is an inbuilt function in PHP. The array_column() function is used to return the values from a single column in the input array. This function is introduced in PHP 5.5.

Syntax

Parameter	Description	Is compulsory
array	Specifies the multi-dimensional array to use	compulsory
Column_key	This parameter may be an integer or a string key name of the column of values to return. It may also be NULL to return complete arrays (useful together with index_key to re-index the array)	compulsory
index_key	This parameter may be an integer key or a string key name of the column. It is used to provide the index/keys for the returned array	optional

Example 1

<?php
$multi = array( "sid" => array(  "firstname" => "sid", "country" => "united states of america" ),
 "sonoo" => array(  "firstname"=> "sonoo",  "country"=> "london"  )  );
$arrcol = array_column($multi, 'firstname');
print_r($arrcol);
?>

Output:

Array(  [0] => sid    [1] => sonoo  )

Example 2

<?php
$record = array( array (  'regno' => 101, 'name' => 'sid',  'course' => 'c',  ),
array(  'regno' => 102,  'name' => 'ajay', 'course' => 'java',  ),
 	 	array(  'regno' => 103, 'name' => 'rahul',  'course' => 'php',  ) );
$details = array_column($record, 'course');
print_r($details);
?>

Output:

Array ( [0] => c  [1] => java  [2] => php )

Example 3

<?php
$record = array(  array(  'id' => 11,  'name' => 'ajay',  'course' => 'C',  ),
  		array( 'id' => 12,  'name' => 'rahul',  'course' => 'PHP',  ),
  		array(  'id' => 13,  'name' => 'abhi',  'course' => 'Java',   ) );
$details = array_column($record, 'course', 'id');
print_r($details);
?>

Output:

Array (   [11] => c   [12] => php  [13] => java )

Example 4

<?php
function Column($details)
{
$rec = array_column($details, 'hobby');
return $rec;
}
 $details = array( array( 'roll' => 5, 'name' => 'Ashish', 'hobby' => 'Cricket',),
 array( 'roll' => 1, 'name' => 'Ajay', 'hobby' => 'Football', ),
array( 'roll' => 3, 'name' => 'Abhishek','hobby' => 'Chess', ),
    
);
print_r(Column($details));
?>

Output:

Array ( [0] => Cricket  [1] => Football   [2] => Chess )

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