A wildcard problem

[Valkrist]

Happy new years folks,

I have a problem. I'm trying to set up a webpage using php to handle much of my link interactions. Now, I have several categories, and each will have its own set of links.

So, let us say that I want to be able to pick different links for each color, and each color below will have several possible subcategories or objects. I would far rather use wildcards to specify each list than have to put an incredibly long if/elseif statement.

<?php  
        $pass = array('redtruck','redhouse','redhat','redshirt','redhair','redbicycle','redwagon','greenwagon','greentruck','greenshirt','greenlawn','greenhouse','greenhat','greenairplane','bluesky','bluejeans','bluebell','blueeyes','bluesguitar',);
     if (in_array($_GET['id'], $pass)) {
    if ($_GET['id'] == 'red' . '*'') {
    include ($_SERVER['DOCUMENT_ROOT'].'/includes/redlinks.php'); }
    elseif ($_GET['id'] == 'green' . '^') {
    include ($_SERVER['DOCUMENT_ROOT'].'/includes/greenlinks.php'); }
    elseif ($_GET['id'] == 'blue' , '*') {
    include ($_SERVER['DOCUMENT_ROOT'].'/includes/bluelinks.php'); }
    else {
        header("HTTP/1.0 404 Not Found");
        include ($_SERVER['DOCUMENT_ROOT'].'/includes/error.php');
}
?>
 

Is there a way to do this, without having to write an incredibly long if/elseif statement to check for every single possible 'red*' 'green*' and 'blue*' posibilities?

[pbmods]

Heya, Valkrist. Welcome to TSDN!

Try something like this:

if( ! empty($_GET['id']) )
{
    foreach
    (
        array
        (
            'red',
            'green',
            'blue'
        )
            as $__color
    )
    {
        if( strpos($_GET['id'], $__color) === 0 )
        {
            include "{$_SERVER['DOCUMENT_ROOT']}/includes/{$__color}links.php";
            $__found = true;
            break;
        }
    }
}
 
if( empty($__found) )
{
    header('HTTP/1.0 404 Not Found');
    include $_SERVER['DOCUMENT_ROOT'] . '/includes/error.php'
}
 

If $_GET['id'] exists and begins with one of those colors, then the matching colorlinks page will be loaded.

If $_GET['id'] does not exist or is invalid, the error page will be loaded.

[Valkrist]

Thank you for your help. I've almost got it.

So, now what I have is something like this:

if(! empty($_GET['id']) )
  {
    foreach
      (
    array
      (
        'red',
        'grn',
        'blu',
        'ora',
        'top'
      )
    as $__passcolor1
      )
      {
    if( strpos($_GET['id'], $__passcolor1) === 0 )
        {
            if(! empty($_GET['id']) )
                {
                    foreach
                        (
                            array
                                (
                                'bicycle',
                                'car',
                                'house',
                                'pants',
                                'shirt',
                                'sweater',
                                'telephone',
                                                                )
                            as $__passname1
                        )
                        {
    if( strpos($_GET['id'], $__passname1) === 3 )
                                {
                                    include ($_SERVER['DOCUMENT_ROOT'].'/includes/'.$_GET['id'].'.php');
                                    $__found = true;
                                    break;
                                }
                            else
                                {
                                include ($_SERVER['DOCUMENT_ROOT'].'/includes/error.php');
                                    $__found = true;
                                    break;
                                }
                        }
                }
            }
        }
    }
if(empty($__found) )
    {
        include "{$_SERVER['DOCUMENT_ROOT']}/includes/top_main.php";
    }
 

However, this only gives me 'redbicycle' as a valid option.. any other option I try gives me the error message.

I tried taking out the 'ELSE' and suddenly 'redcar' will pass correctly, but if I were to type in, say, 'reddentist', instead of an error message or the top_main.php page, I just get a blank field with nothing in it.

So, to sum up:

If I remove the 'ELSE' statement, then I can get the ids of 'redbicycle' and 'redcar' to work correctly, but I have no error for someone manually putting in 'redmybuttlolzz'.

If I leave the ELSE statement in, it ONLY allows the very first possible combinatino "red + bicycle" to pass, and any other combination of variables gets me an error message (even ones that passed correctly when there was no ELSE statement).

What am I doing wrong?

[pbmods]

Heya, Valkrist.

substr() will be your friend here:

if( ! empty($_GET['id']) )
{
    foreach
    (
        array
        (
            'red'   => 3,
            'green' => 5,
            .
            .
            .
        )
        as $__color => $__len
    )
    {
        if( strpos($_GET['id'], $__color) === 0 )
        {
            $__part2 = substr($_GET['id'], $__len);
 
            echo $__part2;
            exit;
        }
    }
}