Doing a PHP in_array() but with a needle of one another array()

Question

I need something like in_array() for search if at least one of $foo is in $bararray, like:

$foo = array("ESD", "RED", "IOP");
$bar = array("IOD", "MNP", "JDE", "RED");

if(in_array($foo, $bar)) // true because RED is in $foo and in $bar

Thank you in advance!

Answer 1

I think you want array_intersect():

$matches = array_intersect($foo, $bar);

$matches will return an array of all items that are in both arrays, so you can:

• Check to see if there are no matches with empty($matches)
• Read the number of matches with count($matches)
• Read the values of the intersections if you need to

Reference: http://php.net/manual/en/function.array-intersect.php

Example for your case:

$foo = array("ESD", "RED", "IOP");
$bar = array("IOD", "MNP", "JDE", "RED");

// Just cast to boolean
if ((bool) array_intersect($foo, $bar)) // true because RED is in $foo and in $bar

Answer 2

Best is to create your own function if it always is about 2 arrays;

function in_both_arrays($key, $arrone, $arrtwo)
{
  return (in_array($key, $arrone) && in_array($key, $arrtwo)) ? true : false ;
}