PHP 8 reference · Array Functions

PHP compact() Function

Create an array from variable names, using each name as the key and the variable's value as the value.

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Syntax

compact(array|string $var_name, array|string ...$var_names): array

Parameter	Description
`var_name`	A variable name, or an array of names.
`var_names` optional	More names.

An array of name => value pairs.

Variables to an arrayTry it yourself

<?php
$title = "Arrays";
$views = 1200;
print_r(compact("title", "views"));

Output

Array
(
    [title] => Arrays
    [views] => 1200
)

Pass a list of namesTry it yourself

<?php
$name = "Ada";
$role = "admin";
echo json_encode(compact(["name", "role"])), "\n";

Output

{"name":"Ada","role":"admin"}

Version	Change
PHP 4.0	Added
PHP 8.0	An undefined variable name raises a warning (a notice since 7.3).

extract() · Create variables from an array's keys and values in the current scope. Never use it on user input.
array_combine() · Create an array by using one array for keys and another for values. Both arrays must have the same number of elements.
PHP Arrays · tutorial
PHP Array Functions · tutorial