php 数组中的下一个键
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Next key in array
提问by Jordy
I have an array:
我有一个数组：
$array=array(
"sdf"=>500,
"gsda"=>1000,
"bsdf"=>1500,
"bads"=>2000,
"iurt"=>2500,
"poli"=>3000
);
How can I get the name of the next key? For example if the current array is gsda, I need bsdf.
如何获取下一个键的名称？例如，如果当前数组是gsda，我需要bsdf.
采纳答案by Lars
If the pointer of current()is on the right key, @Thomas_Cantonnet is right and you want to use next(). If you did not iterate through the array via next(), you first have to go through the array to set the internal index pointer correctly:
如果 的指针current()在正确的键上，@Thomas_Cantonnet 是正确的，您想使用next(). 如果您没有通过 next() 遍历数组，则首先必须遍历数组以正确设置内部索引指针：
$search = "bsdf";
while (($next = next($array)) !== NULL) {
if ($next == $search) {
break;
}
}
Now $next points to your current search-index and you can iterate over the rest via next().
现在 $next 指向您当前的搜索索引，您可以通过next().
回答by RiaD
If pointer is not on this element, as other solutions assume, You can use
如果指针不在此元素上，正如其他解决方案所假设的那样，您可以使用
<?php
$keys = array_keys($arr);
print $keys[array_search("gsda",$keys)+1];
回答by Tom
$next = next($array);
echo key($array);
Should return the key corresponding to $next;
应该返回对应于 $next 的键；
回答by J_S
use a combo of next and each to get both the key and value of the next item:
使用 next 和 each 的组合来获取下一项的键和值：
next($array)
$keyvalueArray = each ( $array )
$keyvalueArray should now hold the next key and value as 'key' and 'value'
$keyvalueArray 现在应该将下一个键和值保存为“键”和“值”
回答by dev-null-dweller
next($array);
$key = key($array);
prev($array);
回答by shakram02
you can use a foreach
你可以使用 foreach
$test=array(
1=> array("a","a","a"),
2=> array("b","b","b"),
'a'=> array("c","c","c")
);
foreach (array_keys($test) as $value)
{
foreach ($test[$value] as $subValue)
{
echo $subValue." - ".$value;
echo "\n";
}
echo "\n";
}
output
输出
a - 1
a - 1
a - 1
b - 2
b - 2
b - 2
c - a
c - a
c - a
回答by The EasyLearn Academy
function get_next_key_array($array,$key){
$keys = array_keys($array);
$position = array_search($key, $keys);
if (isset($keys[$position + 1])) {
$nextKey = $keys[$position + 1];
}
return $nextKey;
// in above function first argument is array in which key needs to be searched and 2nd argument is $key which is used to get next key so it means you must one existing key of associative array from you which you want to get next keys.
// 在上面的函数中，第一个参数是需要搜索键的数组，第二个参数是 $key 用于获取下一个键，因此这意味着您必须从关联数组的一个现有键中获取下一个键。
