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阵列——地图和插图
原标题:array_map and append string to elements of an array

我有这样一个阵列:

$a = array( aa ,  bb ,  cc ,  dd );

我要补充一下阵列所有要素一开始的 r。 是否有可能通过在这种阵列上阵列——地图?

最佳回答
$a = array_map(function ($str) { return "rq$str"; }, $a);
问题回答
function addRq($sValue) {
    return  rq .$sValue;
}
$newA = array_map("addRq", $a);

另见example

You can have it like this:

<?php
    $a = array( aa ,  bb ,  cc ,  dd );
    $i=0;
    foreach($a as $d) {
        $a[$i] =  rq .$d;
        $i++;
    }
    var_dump($a);
?>




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