which is best array_search or in_array?

Question

I have a large while loop function, every time it gets loaded for check with current URL name. So I need to know which one is better to check the UR

Answer 1

Based on the documentation of in_array and array_search, I'd think that it mainly depends on what you want to do with the information: if you need the entry, use array_search, if you just want to check if the url exists in the array, in_array should be enough.

Answer 2

It's up to your array-size. -If you have a small array(like < 500k 32bit-key), in_array and array_search give you same performance isset(array[needle]) make no sense because of flip()

-By big arrays(like > 1m 32bit key) There are really big difference between in_array and isset(array[needle])

Answer 3

array1=array("a"=>"one","b"=>"two"); 

if(in_array("one",$array))
{
  echo "array exit"; 
 }
 else
  {
     echo " array not exist"; 
  }

echo "</br>";
//example of array_search():
 $b1=array("a"=>"one","b"=>"two");
    echo array_search("one",$b1); 

in_array return true and false value and array_search return key of the array

Answer 4

If you're only goal is to check if an URL exists in the array I'd go for in_array. Altough the best way is having keys set so you can just search by array key. That way you save alot of looping.

$searchword = "test";
echo $array[$searchword];

Answer 5

it's different function in_array - return true if find value array_search - return position if find value

$a = array('a', 'b');
var_dump(in_array('a', $a)); // return true
var_dump(array_search('a', $a)); // return 0 
if (array_search('a', $a)) - false

Answer 6

If it's a large array and in a loop, neither is "best". Instead use array_flip() on your array, so urls become keys. And use isset() to check for the presence.