PHP 怎么样将 Array 的 key 统一加上前缀 ?

Question

比如 $array = [ "version" => "1.1", "connection" => "close", ]; 变成 $array = [ "http_version" => "1.1", "http_connection" => "close", ]; “简单”的方法是： $arrayPrefix = []; foreach ($array as $key => $value) { $arrayPrefix['prefix_' . $key] = $value; } $array = $arrayPrefix; 有没有可能用 array_map 之类的函数实现？

Answer 1

大哥,代码不一定要追求函数用的6,你的算法已经非常简洁了.

<?php
$array = [
    "version"    => "1.1",
    "connection" => "close",
];

array_map(function($item)use(&$array){
    $array['http_'.$item] = $array[$item];
    unset($array[$item]);
},array_keys($array));

print_r($array);exit;

Answer 2

这个得写代码了

Answer 3

<?php
$array = [
    "version"    => "1.1",
    "connection" => "close",
];
$c=array_combine(array_map(function($v){return "http_".$v;},array_keys($array)),array_values($array));
print_r($c);

---

Array
(
    [http_version] => 1.1
    [http_connection] => close
)

---

Answer 4

<?php

header('content-type:text/html;charset=utf8');
$array = [

"version"    => "1.1",
"connection" => "close",

];

foreach ($array as $key => $value)
{

$array["http_".$key] = $value;
unset($array[$key]);

}
var_dump($array);exit;

Answer 5

用另一个数组接收

$array = [
    "version"    => "1.1",
    "connection" => "close",
];
例 ：$arr=[];
    $arr["http_version"]=$array["version"];
    $arr["http_connection"]=$array["connection"];
    
    var_dump($arr);
    
    
    $arr = [
        "http_version"    => "1.1",
        "http_connection" => "close",
    ];

Answer 6

第一反应是键值翻转再array_map处理 仔细一想值相同会有问题
然后就通过array_combine组合
话说楼上array_map的用法以前确实没用过(大于2个参数)

$array = [
    "version"    => "1.1",
    "connection" => "close",
];

$result = array_combine(array_map(function($key){
    return "http_" . $key;
}, array_keys($array)), array_values($array));

print_r($result);

PS: 汗!!!
好吧楼上就是这样的想法... 不仔细看我还以为是array_map使用了三个参数还专门去看了下文档
PS: 再汗
原来是楼上更新了...

Answer 7

要我说实话吗？上面一个没你的快，你可以试试大一点的数组