在php中检查二维数组的值

Question

I have an array like this:

array(2) { 
          [0]=> array(1) { ["cate_id"]=> string(2) "14" }
          [1]=> array(1) { ["cate_id"]=> string(2) "15" }
         }

How can I check if the value 14 exists in the array without using a for loop?

I've tried this code:

var_dump(in_array('14',$categoriesId));exit;

but it returns false, and I do not know why.

Answer 1

I wonder why you don't need a for. Well a quickest way would be to serialize your array and do a strpos.

$yourarray = array('200','3012','14');
if(strpos(serialize($yourarray),14)!==false)
{
echo "value exists";
}

Warning : Without using looping structures you cannot guarantee the value existence inside an array. Even an in_array uses internal looping structures. So as the comments indicate you will get a false positive if there is 1414 inside the $yourarray variable. That's why I made it a point in the first place.

If you need to find a specific value in an array. You have to loop it.