Returns the number of elements in an array or the number of characters in a string.
array is the name of the array whose size you want.
string is the string whose number of characters you want.
string $s = "Hello";
$stringlen = size($s);
The size($s) function returns 5, then the statement assigns 5 to $stringlen.
int $myInts[] = {1,2,3,4,5,6};
$numInts = size($myInts);
The size($myInts) function returns 6, then the statement assigns 6 to $numInts.