[英]Unset associative array by value
I'd like to remove an array item by value. 我想按值删除数组项。 Key cannot be specified. 无法指定密钥。 Here is the array. 这是数组。 I have sorted the array by value, numeric descending. 我已按值(数值降序)对数组进行了排序。
Array
(
[this] => 15
[that] => 10
[other] => 9
[random] => 8
[keys] => 4
)
If I want to unset all items that have a value less than 10. How do I do that? 如果要取消设置所有小于10的项目。我该如何做?
使用array_filter
函数:
$a = array_filter($a, function($x) { return !($x < 10); });
foreach($array as $key => $value)
if( $value < 10 )
unset($array[$key])
Assuming that all values are ints: 假设所有值都是整数:
for (i=9;i>=0;i--)
{
while (array_search($i, $assocArray) !== false)
{
unset($assocArray[array_search($i, $assocArray)]);
}
}
There probably are more elegant ways of doing this, but fever has a firm grip on my brain :) 可能有更优雅的方法,但是发烧使我的大脑牢牢地抓紧了:)
knittl's answer is correct, but if you're using an older version of PHP, you can' t use the anonymous function, just do: knittl的答案是正确的,但是如果您使用的是旧版本的PHP,则不能使用匿名函数,只需执行以下操作:
function filterFunc($v)
{
return $v >= 10;
}
$yourArray = array_filter($yourArray,'filterFunc');
Credit to Knittl 归功于Knittl
$test = array(
"this" => 15,
"that" => 10,
"other" => 9,
"random" => 8,
"keys" => 4
);
echo "pre: ";print_r($test);
pre: Array ( [this] => 15 [that] => 10 [other] => 9 [random] => 8 [keys] => 4 )
Run this code: 运行此代码:
foreach($test AS $key => $value) {
if($value <= 10) {
unset($test[$key]);
}
}
Results are: 结果是:
echo "post: ";print_r($test);
post: Array ( [this] => 15 )
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