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@ 2024-09-09T04:23:09Z

<?php

$arr = ['one', 'two', 'three', 'foo', 'bar', 'etc'];

$prev = '';
foreach ($arr as &$ref) {
    $ref = $prev . $ref;
    $prev = $ref;
}
var_export($arr);

$arr = ['one', 'two', 'three', 'foo', 'bar', 'etc'];


var_export(
    array_map(
        function($v) {
            static $prev = '';
            $v = $prev . $v;
            $prev = $v;
            return $v;
        },
        $arr
    )
);

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
var_export: documentation ( source)

preferences:dark modelive previewkey bindings

56.24 ms | 405 KiB | 5 Q