column()

The column() method returns the values from a single column in the input array

Example.php

<?php
use kim\present\utils\arrays\ArrayUtils;

$arrayUtils = ArrayUtils::from([
    ["any" => "first",  1, 2, 3],
    ["any" => "second", 4, 5, 6],
    ["any" => "third",  7, 8, 9]
]);

// Use "any" value in internal array as value of array
$arrayUtils->column("any");
// expected output: ["first", "second", "third"]


// Use 2nd value in internal array as value,
// Use "any" in internal array as key of array
$arrayUtils->column(1, "any");
// expected output: ["first" => 2, "second" => 5, "third" => 8]


// Use value in internal array as value,
// Use "any" in internal array as key of array
$arrayUtils->column(null, "any");
// expected output: [
//   "first"  => ["any" => "first",  1, 2, 3],
//   "second" => ["any" => "second", 4, 5, 6],
//   "third"  => ["any" => "third",  7, 8, 9]
//]

Syntax

$arrayUtils->column(mixed $valueKey, mixed $indexKey = null) : ArrayUtils;

Parameter

• $valueKey

  The key value of the element to be used as the value.

  If is null, Use element to value.

• $indexKey

  The key value of the element to be used as the key. Default is NULL. If is null, Re-index from 0.

Return value

• A array of values representing a single column from the input array.

Prefixing

$arrayUtils->columnAs(mixed $valueKey, mixed $indexKey = null) : array;

ArrayUtils::columnFrom(iterable $from, mixed $valueKey, mixed $indexKey = null) : ArrayUtils;

ArrayUtils::(iterable $from, mixed $valueKey, mixed $indexKey = null) : array;

References

https://www.php.net/manual/en/function.array-columnwww.php.net