[jack_mcs]

Given
$array = array("a", "b", "c");
$idx = getPos($url);

Should I be able to do this:
echo $array[$idx];

I tried the above but it doesn't ouput a value in the array. $idx is a substr taken from a return url and is within the arrays range. How do I access the array using $idx?

Jack

[darkfreak]

If I'm right, there shouldn't be any problem as far as your getPos() will actually return valid index for that array. Maybe you could use $_GET['var'] to get your value more easily?

Assuming:
-you have the following code in array.php
-you call it with your browser like: array.php?index=1

The following code (hopefully) does your trick:

PHP Code:

<?php



$array = array("a", "b", "c");



/* check for numeric index value in the URL*/

if( isset($_GET['index']) AND is_numeric($_GET['index']) ) {

    /* is_numeric accepts also floats -> cast index to integer */

    $index = (int) $_GET['index'];

    /* see if given index is valid in $array */

    if( array_key_exists($index, $array) ) {

        echo "element at $index: $array[$index]\n";

    }

    else {

        echo "invalid index: $index\n";

    }

}

else {

    echo "no numeric index given.\n";

}

?>

[jack_mcs]

The function getPos() returns a string. I'm somewhat new to php and was under the impression that strings and numbers were treated the same. That, apparently, is not true in this situation. As soon as I read your suggestion of using is_numeric I realized the problem. I added a cast so the code now reads $array[(int)$idx]; and it works. Thanks for the help.

Jack

[darkfreak]

No problem Actually I started thinking that again after I replied to you, and I had a feeling that the problem might be just there (no casting done), altough I also thought that casting would have been done automatically.