[SOLVED] getting adjacent values

[hchsk]

i have a list of values, deliminated by periods. I want to print the value to the left and right of the value given to the function. if the value given is at the end of the list of values, i want it to loop to the other side, and return the first value as adjacent.

 

here is the code i have attempted, but is far from working, and does not even yet address the issue of "looping" the string being searched through.

 

function opponents($team) {
//ADD DELIMITERS
$search = '.' . $team . '.';

//SEARCH FOR ME
$me = strpos($GLOBALS['opponents'], $search);

$myopponent = substr($GLOBALS['opponents'], ($me), ($me+2));
$myopponent2 = substr($GLOBALS['opponents'], ($me-2), ($me));

//GET RID OF DELIMINERS AND ME
$myopponent = str_replace('.', '', $myopponent);
$myopponent = str_replace($team, '', $myopponent);

$myopponent2 = str_replace('.', '', $myopponent2);
$myopponent2 = str_replace($team, '', $myopponent2);

print $myopponent . 'and' . $myopponent2;

}

 

thanks for any help!

[Ken2k7]

Rather than the code, can you just give me an example of what you want accomplished?

 

Thanks!

[hchsk]

ok, haha, so if i have

 

.1.2.5.6.8.9.10.

 

and i call functionadjacent('6');

 

i want output:

 

5, 8

 

 

and if i call functionadjacent('10');

 

i want:

 

9, 1

 

[Ken2k7]

Here's one I made from scratch. Please excuse the naming. I'm also not a fan of using $GLOBALS.

 

Assuming $opponents is - 1.2.5.6.8.9.10

 

function findOpponents ($search, $opponents) {
$opponents = explode('.', $opponents);
$num_opponents = count($opponents);

$location = array_search($search, $opponents);

// if $location is false, then there are no opponents
if ($location === false) return null;

// special cases
if ($location == 0) return array($opponents[1], $opponents[$num_opponents - 1]);
if ($location == $num_opponents - 1) return array($opponents[$location - 1], $opponents[0]);
return array($opponents[$location - 1], $opponents[$location + 1]);
}

 

That should return an array or null.

[hchsk]

this worked better than anything i've written, although i modified it as i'm afraid i needed the global variable, if you could suggest a better method i would be glad to know and use it. i need it because i'm calling this script as part of a larger file that is contained in an include, and it needs to use a variable that is contained in the file itself. this is the modified and working code that i am using, but it still does not loop, findOpponents('1'); prints "and 2" and findOpponents('10'); seems to completely fail.

 

function findOpponents($search) {

$opponents = $GLOBALS['opponents'];

$opponents = explode('.', $opponents);
$num_opponents = count($opponents);

$location = array_search($search, $opponents);

// if $location is false, then there are no opponents
if ($location === false) return null;

// special cases
if ($location == 0) return array($opponents[1], $opponents[$num_opponents - 1]);
if ($location == $num_opponents - 1) return array($opponents[$location - 1], $opponents[0]);
$opponents = array($opponents[$location - 1], $opponents[$location + 1]);

print $opponents[0] . ' and ' . $opponents[1];
}

[hchsk]

actually, i made a mistake there, but what i said otherwise holds true. code modified to:

 

 

function findOpponents($search) {

$opponents = $GLOBALS['opponents'];

$opponents = explode('.', $opponents);
$num_opponents = count($opponents);

$location = array_search($search, $opponents);

// if $location is false, then there are no opponents
if ($location === false) return null;

// special cases
if ($location == 0) $opponents = array($opponents[1], $opponents[$num_opponents - 1]);
if ($location == $num_opponents - 1) $opponents = array($opponents[$location - 1], $opponents[0]);
$opponents = array($opponents[$location - 1], $opponents[$location + 1]);

print $opponents[0] . ' and ' . $opponents[1];
}

[hchsk]

im thinking the solution is in

 

$opponents[0] = end($opponents);
$opponents[] = $opponents[1];

 

for the special cases, but i can't quite seem to get it right, as if you add these at the beginning, if you are searching for the last in the list, it would catch the first showing of it, which would then end up printing "and 1"

 

 

. . . this gets us the special cases

 

//special cases
if ($opponents[0] == '') { print 'aha';}
if ($opponents[1] == '') { print 'aha';}

 

 

this works for checking the last value. . .

 

 

function findOpponents($search) {

$opponents = $GLOBALS['opponents'];

$opponents = explode('.', $opponents);

$location = array_search($search, $opponents);

// if $location is false, then there are no opponents
if ($location === false) return null;

// set opponents
$opponentsarray = $opponents;
$opponents = array($opponents[$location - 1], $opponents[$location + 1]);

//special cases
if ($opponents[0] == '') { print 'aha';}
if ($opponents[1] == '') { $opponents[1] = $opponentsarray[1];}

print $opponents[0] . ' and ' . $opponents[1];
}

[hchsk]

solved:

 

function findOpponents($search) {

$opponents = $GLOBALS['opponents'];

$opponents = explode('.', $opponents);

$location = array_search($search, $opponents);

// if $location is false, then there are no opponents
if ($location === false) return null;

// set opponents
$opponentsarray = $opponents;
$opponents = array($opponents[$location - 1], $opponents[$location + 1]);

//special cases
if ($opponents[0] == '') { $opponents[0] = $opponentsarray[count($opponentsarray)-1];}
if ($opponents[1] == '') { $opponents[1] = $opponentsarray[1];}

print $opponents[0] . ' and ' . $opponents[1];
}