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@ 2015-02-25T16:34:12Z

<?php

// Example 1 -- Unpacking the array to do work on it
array_map(function ($x) {
    $first_name = $x[0];
    $last_name = $x[1];

    // Do important work here with first_name and last_name...
    // But $first_name and $last_name are scoped to this function

    // See the second example for how we'd inject an anonymous function to operate with $first_name and $last_name
}, [
    ['John',  'Galt'],
    ['Howard', 'Roark'],
]);


// Example 2 -- Separation of input setup and behavior
$behavior = function ($first_name, $last_name) {
    var_dump('Doing hard work!', $first_name, $last_name);
};

array_map(function ($x) use ($behavior) {
    $first_name = $x[0];
    $last_name = $x[1];

    // $behavior is invoked using our unpacked arguments
    $behavior($first_name, $last_name);
}, [
    ['John',  'Galt'],
    ['Howard', 'Roark'],
]);

Output for git.master, git.master_jit, rfc.property-hooks: string(16) "Doing hard work!" string(4) "John" string(4) "Galt" string(16) "Doing hard work!" string(6) "Howard" string(5) "Roark"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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