Searching array for values...

[richie]

$x = Array('a', 'b', 'c', 'd');

$y = Array('a', 'b', 'c', 'a', 'd', 'a', 'c');

I need to compare the two arrays and find out how many times the values in $x occur in $y. For example, $x[0] occurs 3 times in $y, while $x[2] occurs twice.

How can i go about doing this?

TIA,

Richie.

[erikwebb]

Nested loops: loop through $x in an outer loop with a loop through $y in the inner loop. Inside the inner loop, check for equivalence and add it to a counter or whatever you're using to tally.

[Weedpacket]

At least one loop could be eliminated by using array_count_values($y); from the result of that remove elements whose keys aren't listed in $x.