array_column(3) [php man page]

ARRAY_COLUMN(3) 							 1							   ARRAY_COLUMN(3)

array_column - Return the values from a single column in the input array

SYNOPSIS

       array array_column (array  $array, mixed  $column_key, [mixed  $index_key = null])

DESCRIPTION

       array_column(3)	returns  the  values  from  a  single  column of the $array, identified by the $column_key. Optionally, you may provide an
       $index_key to index the values in the returned array by the values from the $index_key column in the input array.

PARAMETERS

	      o $array
		- A multi-dimensional array (record set) from which to pull a column of values.

	      o $column_key
		- The column of values to return. This value may be the integer key of the column you wish to retrieve, or it may  be  the  string
		key  name  for an associative array. It may also be NULL to return complete arrays (useful together with $index_key to reindex the
		array).

	      o $index_key
		- The column to use as the index/keys for the returned array. This value may be the integer key of the column, or it  may  be  the
		string key name.

RETURN VALUES

	Returns an array of values representing a single column from the input array.

EXAMPLES

       Example #1

	      Get column of first names from recordset

	      <?php
	      // Array representing a possible record set returned from a database
	      $records = array(
		  array(
		      'id' => 2135,
		      'first_name' => 'John',
		      'last_name' => 'Doe',
		  ),
		  array(
		      'id' => 3245,
		      'first_name' => 'Sally',
		      'last_name' => 'Smith',
		  ),
		  array(
		      'id' => 5342,
		      'first_name' => 'Jane',
		      'last_name' => 'Jones',
		  ),
		  array(
		      'id' => 5623,
		      'first_name' => 'Peter',
		      'last_name' => 'Doe',
		  )
	      );

	      $first_names = array_column($records, 'first_name');
	      print_r($first_names);
	      ?>

	      The above example will output:

	      Array
	      (
		  [0] => John
		  [1] => Sally
		  [2] => Jane
		  [3] => Peter
	      )

       Example #2

	       Get column of last names from recordset, indexed by the "id" column

	      <?php
	      // Using the $records array from Example #1
	      $last_names = array_column($records, 'last_name', 'id');
	      print_r($last_names);
	      ?>

	      The above example will output:

	      Array
	      (
		  [2135] => Doe
		  [3245] => Smith
		  [5342] => Jones
		  [5623] => Doe
	      )

PHP Documentation Group 													   ARRAY_COLUMN(3)

ARRAY(3)								 1								  ARRAY(3)

array - Create an array

SYNOPSIS

       array array ([mixed  $...])

DESCRIPTION

	Creates an array. Read the section on the array type for more information on what an array is.

PARAMETERS

	      o $...
		-  Syntax  "index  => values", separated by commas, define index and values. index may be of type string or integer. When index is
		omitted, an integer index is automatically generated, starting at 0. If index is an integer, next generated index will be the big-
		gest  integer  index  +  1. Note that when two identical index are defined, the last overwrite the first.  Having a trailing comma
		after the last defined array entry, while unusual, is a valid syntax.

RETURN VALUES

	Returns an array of the parameters. The parameters can be given an index with the => operator. Read the section on the array type for more
       information on what an array is.

EXAMPLES

	The following example demonstrates how to create a two-dimensional array, how to specify keys for associative arrays, and how to skip-and-
       continue numeric indices in normal arrays.

       Example #1

	      array(3) example

	      <?php
	      $fruits = array (
		  "fruits"  => array("a" => "orange", "b" => "banana", "c" => "apple"),
		  "numbers" => array(1, 2, 3, 4, 5, 6),
		  "holes"   => array("first", 5 => "second", "third")
	      );
	      ?>

       Example #2

	      Automatic index with array(3)

	      <?php
	      $array = array(1, 1, 1, 1,  1, 8 => 1,  4 => 1, 19, 3 => 13);
	      print_r($array);
	      ?>

	      The above example will output:

	      Array
	      (
		  [0] => 1
		  [1] => 1
		  [2] => 1
		  [3] => 13
		  [4] => 1
		  [8] => 1
		  [9] => 19
	      )

	Note that index '3' is defined twice, and keep its final value of 13. Index 4 is defined after index 8, and next  generated  index  (value
       19) is 9, since biggest index was 8.

	This example creates a 1-based array.

       Example #3

	      1-based index with array(3)

	      <?php
	      $firstquarter = array(1 => 'January', 'February', 'March');
	      print_r($firstquarter);
	      ?>

	      The above example will output:

	      Array
	      (
		  [1] => January
		  [2] => February
		  [3] => March
	      )

	As  in Perl, you can access a value from the array inside double quotes. However, with PHP you'll need to enclose your array between curly
       braces.

       Example #4

	      Accessing an array inside double quotes

	      <?php

	      $foo = array('bar' => 'baz');
	      echo "Hello {$foo['bar']}!"; // Hello baz!

	      ?>

NOTES

       Note

	      array(3) is a language construct used to represent literal arrays, and not a regular function.

SEE ALSO

       array_pad(3), list(3), count(3), range(3), foreach, The array type.

PHP Documentation Group 														  ARRAY(3)