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? ??? ?? PHP ???? array_map, array_walk, array_filter ? ?? PHP ?? ??? ???? ??????

array_map, array_walk, array_filter ? ?? PHP ?? ??? ???? ??????

Oct 29, 2024 am 07:09 AM

Which PHP Array Function is Right for You: array_map, array_walk, or array_filter?

array_map, array_walk, array_filter? ??? ??

PHP??? ? ? ?? ??? ?? ??? ?? ?????. ?? ?? ??? ?? ???? ????? ???? ??? ????.

array_map:

  • ?? ??? ??? ? ????.
  • ?? ??? ?????.
  • ??? ??? ? ??? ?????.
  • ??? ? ??? ?? ??? ???? ? ?????.

array_walk:

  • ?? ??? ??? ? ????.
  • ?? ??? ?? ?????.
  • true? ?????.
  • ?? ?? ?????? ?? ?? ???? ?? ??? ???? ? ?????.

array_filter:

  • ??? ??? ???? ??? ??????.
  • ?? ?? ?????.
  • ?? ??? ???? ??? ??? ? ??? ?????.

?? ???:

???? ???? ?? ?? ?? ??? ?????.

<code class="php">$numbers = [2.4, 2.6, 3.5];

$map_result = array_map('floor', $numbers); // Round down each element
$walk_result = array_walk($numbers, function (&$v, $k) { $v = floor($v); }); // Round down each element in-place
$filter_result = array_filter($numbers, function ($a) { return $a > 2.5; }); // Filter out elements less than 2.5</code>

??:

  • map_result: [2, 2, 3]
  • walk_result: true(?? ? ??)
  • filter_result: [2.6, 3.5]

????? array_map? ??? ??? ??? ???? ?? array_walk? ?? ??? ?? ?????. array_filter? ??? ??? ???? ?? ??? ?? ??? ?????.

????? array_map, array_walk ? array_filter? ???? ????? ??? ??? ??? ?? ??? ?? ?????. ??? ??? ???? ?? ?? ??? ?? ?? ??? ?? ????.

? ??? array_map, array_walk, array_filter ? ?? PHP ?? ??? ???? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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