PHP multidimensional arrays merged into an array

Array ([0] = = Array ([id] = 1) [1] = = Array ([id] = 2))

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A multidimensional array is also an array
What kind of form do you want to merge into?

A multidimensional array is also an array
What kind of form do you want to merge into?

Just want to point to the reference, the result point has become lost turn.
I mean, I want to combine multidimensional arrays into one-dimensional arrays. I'm good. Find the database as a condition based on this one-dimensional array

Since you have not given the format you need, you can only cite one example

$a = Array (  ' id ' = 1),  

Array (    [0] = 1    [1] = 2)

$a = array (' ID ' +  1),  array (' id ' = 2), $ar = Array (), foreach ($a as $v) $ar [] = $v [' id '];p rint_r ($ar);

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