Re: question about a loop in a loop

I think array_intersect() and array_diff() is useful for you.. http://www.php.net/manual/en/function.array-intersect.php http://www.php.net/manual/en/function.array-diff.php -- Yasuo Ohgaki "Institute for Social Ecology" <ise@social-ecology.org> wrote in message news:Pine.BSF.4.21.0103281453570.14186-100000@flag.blackened.net... > hi, > > I've been driving myself bonkers trying to figure out wy this code block > does not work as it is supposed to. am hoping that someone on this list > can shed some light on it. > > Whta I am trying to do is evluate two arrays. One array is populated with > a list. The other array is populated with list items that are found in > the first array. Array 2 can have either all of the items found in array > 1, some, or none. I want to create a marker that would tell me which > items in array 2 are found in array 1 and where. > > My code so far: > > for argument sake lets say: > > $add[$key] ($key defined earlier) is equal to "a, b, e, g" > $add[$key] is the second array > > $$key is the second array, and it equals "a, b, c, d, e, f, g, h, i" > $$key is the first array. > > > code block: > > $x = 0; > do > { > for ($y = 0; $y <= count ($add[$key]); $y++) > { > if ($add[$key][$y] == $$key[$x]) > { > $mark[$x] = $x; > } > } > $x++; > }while ($x < count ($$key)); > > So, the idea is that every time $add[$key] at "Y" position is equal to > $$key at X position, a third array is populated with the location value of X. > > but this is not what I am getting spti back at me. $mark is populated > every iteration of the inner loop regardless if $add[$key][$y] == > $$key[$x] > > Any suggestions? > > thanks! > > Michael > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net >