我希望数组合并为键值对。看下面的例子
这是我的代码和数组$ aExtraFilter
array (size=4)
0 =>
array (size=2)
'key' => string 'CookTech' (length=8)
'value' => string 'Broil' (length=5)
1 =>
array (size=2)
'key' => string 'CookTech' (length=8)
'value' => string 'Pan Fry' (length=7)
2 =>
array (size=2)
'key' => string 'CookSkills' (length=10)
'value' => string 'Intro' (length=5)
3 =>
array (size=2)
'key' => string 'CookSkills' (length=10)
'value' => string 'Knife Skills' (length=12)
这是我的代码:
$aExtraFilter2 = [];
$extrafilterkey = '';
$extrafiltervalue = [];
foreach ($aExtraFilter as $key => $value) {
$extrafilterkey = $value['key'];
$aExtraFilter2[$extrafilterkey] = [];
array_push($extrafiltervalue, $value['value']);
$aExtraFilter2[$extrafilterkey] = implode(',', $extrafiltervalue);
}
var_dump($aExtraFilter2);
输出是:
array (size=2)
'CookTech' => string 'Broil,Pan Fry' (length=13)
'CookSkills' => string 'Broil,Pan Fry,Intro,Knife Skills' (length=32)
我希望它看起来像这样:
array (size=2)
'CookTech' => string 'Broil,Pan Fry' (length=13)
'CookSkills' => string 'Intro,Knife Skills' (length=32)
我想我差不多了,但我想我需要一些帮助。
答案 0 :(得分:1)
这一行什么都不做,因为稍后因为设置相同的变量而被取代:
$aExtraFilter2[$extrafilterkey] = [];
此行附加到数组,无论您拥有$value['key']
的内容,这就是为什么您将所有键集中在输出中的原因:
array_push($extrafiltervalue, $value['value']);
这将产生所需的输出:
// fill array of arrays
$aExtraFilter2 = [];
foreach ($aExtraFilter as $key => $value) {
if (!array_key_exists($value['key'], $aExtraFilter2)) $aExtraFilter2[$value['key']] = [];
$aExtraFilter2[$value['key']][] = $value['value'];
}
// convert to string (if needed at all, depends on what you're doing later)
foreach ($aExtraFilter2 as $key => $set) {
$aExtraFilter2[$key] = join(',', $set);
}
答案 1 :(得分:1)
对此进行编码的典型方法是创建一个基于密钥的临时结构,并包含一个包含值的数组:
$tmp = [];
foreach ($aExtraFilter as $pair) {
$tmp[$pair['key']][] = $pair['value'];
}
之后结构如下:
[
'CookTech' => ['Broil', 'Pan Fry'],
'CookSkills' => ['Intro', 'Knife Skills'],
]
然后,将该数组映射到您想要的表示形式:
$aExtraFilter2 = array_map(function($values) {
return join(',', $values);
}, $tmp);
另请参阅:array_map()