array_column

Definition and usage

array_column() returns the value of a single column in the input array.

Example

Example 1

Remove the last_name column from the record set:

 <?php
// Array of possible records returned by the database
$a = array (
  array (
    'id' => 5698 ,
    'first_name' => 'Bill' ,
    'last_name' => 'Gates' ,
  ) ,
  array (
    'id' => 4767 ,
    'first_name' => 'Steve' ,
    'last_name' => 'Jobs' ,
  ) ,
  array (
    'id' => 3809 ,
    'first_name' => 'Mark' ,
    'last_name' => 'Zuckerberg' ,
  )
) ;

$last_names = array_column ( $a , 'last_name' ) ;
print_r ( $last_names ) ;
?>

Output:

 Array
(
  [0] => Gates
  [1] => Jobs
  [2] => Zuckerberg
)

Example 2

Take the last_name column from the record set and use the corresponding "id" column as the key value:

 <?php
// Array of possible records returned by the database
$a = array (
  array (
    'id' => 5698 ,
    'first_name' => 'Bill' ,
    'last_name' => 'Gates' ,
  ) ,
  array (
    'id' => 4767 ,
    'first_name' => 'Steve' ,
    'last_name' => 'Jobs' ,
  )
  array (
    'id' => 3809 ,
    'first_name' => 'Mark' ,
    'last_name' => 'Zuckerberg' ,
  )
) ;

$last_names = array_column ( $a , 'last_name' , 'id' ) ;
print_r ( $last_names ) ;
?>

Output:

 Array
(
  [5698] => Gates
  [4767] => Jobs
  [3809] => Zuckerberg
)

grammar

 array_column ( array , column_key , index_key ) ;