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@ 2018-06-11T13:09:54Z

<?php // This code is public domain. The original author is Marc Ermshaus.
 
error_reporting(-1);
 
/**
 * Circularly shifts an array
 *
 * Shifts to right for $steps > 0. Shifts to left for $steps < 0. Keys are
 * preserved.
 *
 * @param  array $array Array to shift
 * @param  int   $steps Steps to shift array by
 * @return array Resulting array
 */
function array_circular(array $array, $steps = 1)
{

    if ($steps === 0) {
        return $array;
    }
 
    $l = count($array);
 
    if ($l === 0) {
        return $array;
    }
 
    $steps = $steps % $l;
    $steps *= -1;
 
    return array_merge(array_slice($array, $steps),
                       array_slice($array, 0, $steps));
}
 
 
 
header('content-type: text/plain');
 
$a = array("1" => "Primeiro", "2"=>"Segundo", "3"=>"Terceiro", "4"=> "Quarto");
 
$l = len($a);
 
for ($i = 0 ; $i < $l; $i++) {
    printf("% 3s  :  %s\n", $i, implode(', ', array_shift_circular($a, $i)));
}
?>

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Call to undefined function len() in /in/uu9B2:41 Stack trace: #0 {main} thrown in /in/uu9B2 on line 41
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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