php array_column与不连续的索引返回错误的索引 [英] php array_column with unsequential index returns wrong index
问题描述
所以我在php中有一个这样的数组:
So I have an array in php like this:
array(
22 => array()
23 => array()
25 => array()
)
我正在search_array中使用array_column在子数组中搜索列。
I am using array_column in search_array to search a column in the sub arrays.
$index=array_search('needlehere',array_column(myarray,'columnbeingsearchedhere'))
但是array_column没有使用正确的索引,但将它们重新索引为0,1,2 ...
But the array_column is not using the correct indexes, but reindexing them to be 0,1,2...
是否仍然要保留正确的索引?
Is there anyway to keep the correct indexes?
推荐答案
array_column()不维护索引(尽管它允许您从行中的其他数据列设置自己的索引),但是您可以使用类似以下的方法来处理: / p>
array_column() doesn't maintain indexes (although it allows you to set your own from other data columns in the row), but you can handle that using something like:
array_combine(
array_keys($myarray),
array_column($myarray,'columnbeingsearchedhere')
);
编辑
或者,这可能会临时占用更多的内存(除非您不介意修改原始数组),但总体上可能会快一些(取决于数据):
Alternative, that probably grabs a bit more memory temporarily (unless you don't mind the original array being modified), but might be a bit faster overall (depending on your data):
$newArray = $myArray;
array_walk($newArray, function(&$value) use ($columnName) { $value = $value[$columnName]; } );
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