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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                [TOC] `array array_map ( callable $callback , array $array1 [, array $... ] )` **主要針對多個數組操作,結果返回到第一個數組中** **執行結果是以第一個傳入的數組鍵名為基礎的** ## 對一個數組進行操作 ```php $func = function($value) { return $value * 2; }; print_r(array_map($func, range(1, 5)); ``` ## 多數組 ``` function show($n, $m) { return("\$a item: $n ; \$b item $m"); } $a = array(1, 2, 3, 4, 5); $b = array("one", "two", "third", "four", "fifth"); $c = array_map("show", $a, $b); print_r($c); //Array //( // [0] => $a item: 1 ; $b item one // [1] => $a item: 2 ; $b item two // [2] => $a item: 3 ; $b item third // [3] => $a item: 4 ; $b item four // [4] => $a item: 5 ; $b item fifth //) ``` ## 傳入外部變量 ``` $double = 3; $func = function($value) use($double){ return $value .'-'. $double; }; $a = ['name'=>'cpj','age'=>12]; $mapArr = array_map($func, $a); //array ( 'name' => 'cpj-3', 'age' => '12-3', ) ``` ## 使用自帶函數 ``` $c = array_map('trim', $a); ```
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