PHP 在 foreach 中创建键 => 值对
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PHP create key => value pairs within a foreach
提问by BobFlemming
I want to create a key-value pairs in an array within a foreach. Here is what I have so far:
我想在 foreach 的数组中创建一个键值对。这是我到目前为止所拥有的：
function createOfferUrlArray($Offer) {
$offerArray = array();
foreach ($Offer as $key => $value) {
$keyval = array($key => $value[4] );
array_push($offerArray,$keyval);
}
return $offerArray;
}
If I declare the array within the foreach, it will overwrites it on each iteration, but defining it outside the foreach doesn't work either and causes triplets:
如果我在 foreach 中声明数组，它将在每次迭代时覆盖它，但在 foreach 之外定义它也不起作用并导致三元组：
array[0] => key => value
array[1] => key => value
How do I make it so I only get key-value pairs like this?
我如何做到这样我只能得到这样的键值对？
key => value
key => value
回答by Emil Vikstr?m
Something like this?
像这样的东西？
foreach ($Offer as $key => $value) {
$offerArray[$key] = $value[4];
}
回答by Eric Leschinski
Create key value pairs on the phpsh commandline like this:
在 phpsh 命令行上创建键值对，如下所示：
php> $keyvalues = array();
php> $keyvalues['foo'] = "bar";
php> $keyvalues['pyramid'] = "power";
php> print_r($keyvalues);
Array
(
[foo] => bar
[pyramid] => power
)
Get the count of key value pairs:
获取键值对的数量：
php> echo count($offerarray);
2
Get the keys as an array:
将键作为数组获取：
php> echo implode(array_keys($offerarray));
foopyramid
回答by Karl Laurentius Roos
Create key-value pairs within a foreach like this:
在 foreach 中创建键值对，如下所示：
function createOfferUrlArray($Offer) {
$offerArray = array();
foreach ($Offer as $key => $value) {
$offerArray[$key] = $value[4];
}
return $offerArray;
}
回答by Matěj Koubík
In PHP >= 5.3 it can be done like this:
在 PHP >= 5.3 中，可以这样做：
$offerArray = array_map(function($value) {
return $value[4];
}, $offer);
回答by binaryLV
function createOfferUrlArray($Offer) {
$offerArray = array();
foreach ($Offer as $key => $value) {
$offerArray[$key] = $value[4];
}
return $offerArray;
}
or
或者
function createOfferUrlArray($offer) {
foreach ( $offer as &$value ) {
$value = $value[4];
}
unset($value);
return $offer;
}
