array choose confussion

[asmith]

$group =
Array 
( 
[1] => Array ( [0] => john [1] => 4 [2] => 5 [3] => 6 ) 
[2] => Array ( [0] => pat [1] => 5 [2] => 2 [3] => 7 ) 
[3] => Array ( [0] => mat [1] => 4 [2] => 5 [3] => 4 ) 
[4] => Array ( [0] => pink [1] => 2 [2] => 2 [3] => 3 ) 
) ;

as you see in the code there 's a group array. which contain users.  each user has 3 values.

the first 2 value of a user  (e.g $group[1][1] and $group[1][2])  is about his activity rank . 1 more important than 2 .

the third value is his warnings for breaking site rules. 

 

i want to choose 2 users from the list which has the most activity and less warnings.  but the most things matters is the activty , if the value in 1 was equal then i should check the value in 2 . if the value in 2 were equal too  , then check for less warnings ( in 3 ) .

 

i'm getting confused at this, any idea ?

 

(the answer for the above array would be 1st pat , and 2nd mat .  1st for 5 in the 1 section,  mat and john are equal in 1 and 2 . but mat has less warning in section 3 , so mat will be chosen .

 

thanks in advance

 

[sKunKbad]

Give this a try:

<?php
$group = array( 
1 => array ( 0 => 'john' , 1 => 4 , 2 => 5 , 3 => 6 ) ,
2 => array ( 0 => 'pat'  , 1 => 5 , 2 => 2 , 3 => 7 ) ,
3 => array ( 0 => 'mat'  , 1 => 4 , 2 => 6 , 3 => 6 ) ,
4 => array ( 0 => 'pink' , 1 => 2 , 2 => 2 , 3 => 10 ) 
) ;
function sort_keys ($x, $y) {
if ($x['1']>$y['1'])
	return -1;
else if ($x['1']<$y['1'])
	return 1;
if ($x['2']>$y['2'])
	return -1;
else if ($x['2']<$y['2'])
	return 1;
if ($x['3']<$y['3'])
	return -1;
else if ($x['3']>$y['3'])
	return 1;
return 0;
}
uasort ($group, 'sort_keys');
echo '<h3>Who is best?</h3><pre>' . print_r($group, 1) . '</pre>';
?>

[asmith]

thanks a lot .

it is working fine

although i don't know the meaning of return 1 and -1 .

 

it sorts the array. the key of the sub arrays  , hasn't change, how can i choose them  ? how can i pull out just the name ?

 

edit : i reviewed all but i'm not understanding this  :'(  return and x y is killing me!  how did x y applied for all 4 sub arrays ?  :'(

[sKunKbad]

$winner = array_shift($group);
echo "<h3>The winner is {$winner['0']}</h3>";

 

This uasort function is not easily understood by beginners ( and I still consider myself one!). I learned it from a book called "PHP5 Advanced" by Larry Ulman. The uasort function takes a user defined function, which sorts according to the rules set within. $x and $y are simply variables set to the keys that are being sorted at that particular instance. You won't be disappointed with the book I mentioned. Go ahead and buy it!

[asmith]

thanks .

the php.net has said about return false or true,  i thought return 1 you meant return true , then return -1 should be 0 !

what does this return do ??

 

(i'm so embaressed i'm didn't understand it 100% , and questions pops up ! :/ 

can i tell me what to change , i want to make it if there were 3 or more persons who was equal in everything  ,then do stuff

?

thanks) 

[asmith]

*bump*

[asmith]

anyone out there could help me ?  i'm stucked!

 

how can i find if more than 2 persons are equal in everything ?

[sKunKbad]

Maybe somebody else can help with this. This is what I have so far:

 

<?php
/* Each person should be judged by key 1 first. The person with the highest value wins
  *If there is a tie, then key 2 is checked, and the person with the highest value wins.
  *If there is still a tie, key3 is checked, and the person with the LOWEST value wins.
  */
$group = array( 
1 => array ( 0 => 'john' , 1 => 4 , 2 => 5 , 3 => 7 ) ,
2 => array ( 0 => 'pat'  , 1 => 4 , 2 => 5 , 3 => 7 ) ,
3 => array ( 0 => 'mat'  , 1 => 4 , 2 => 5 , 3 => 7 ) ,
4 => array ( 0 => 'pink' , 1 => 4 , 2 => 5 , 3 => 7 ) 
) ;
function sort_keys ($x, $y) {
if ($x['1']>$y['1'])
	return -1;
else if ($x['1']<$y['1'])
	return 1;
if ($x['2']>$y['2'])
	return -1;
else if ($x['2']<$y['2'])
	return 1;
if ($x['3']<$y['3'])
	return -1;
else if ($x['3']>$y['3'])
	return 1;
return 0;
}
uasort ($group, 'sort_keys');
echo '<h3>Who is best?</h3><pre>' . print_r($group, 1) . '</pre>';
$group2 = $group;
$winner = array_shift($group);
echo "<h3>The winner is {$winner['0']}</h3>";
/*
  *Now check if there are three or more people that have the same values
  */
$count = count($group2) - 2;
for ($i=1; $i <= $count; $i++){
$a = $i;
$b = $i + 1;
$c = $i + 2;
$three = array_intersect_assoc( $group2["$a"] , $group2["$b"] , $group2["$c"] );
if (array_key_exists('1', $three) && array_key_exists('2', $three) && array_key_exists('3', $three)){
	$nameOne = $group2["$a"]['0'];
	$nameTwo = $group2["$b"]['0'];
	$nameThree = $group2["$c"]['0'];
	echo "All of the value for $nameOne, $nameTwo, and $nameThree are the same<br>";
	echo "<pre>";
	print_r($three);
	echo "</pre>";
}
}
?>

I just want to have the output fixed so that it says "john, pat, mat, and pink all have the same values" instead of how it outputs now.

[sKunKbad]

OK man, I've got done what you asked for. If you need anything else... buy some books. It's Christmas and I ain't gonna be around for a couple days.

 

<?php
/* Each person should be judged by key 1 first. The person with the highest value wins
  *If there is a tie, then key 2 is checked, and the person with the highest value wins.
  *If there is still a tie, key3 is checked, and the person with the LOWEST value wins.
  */
$group = $savedGroup = array( 
1 => array ( 0 => 'john' , 1 => 6 , 2 => 5 , 3 => 3 ) ,
2 => array ( 0 => 'pat'  , 1 => 6 , 2 => 5 , 3 => 3 ) ,
3 => array ( 0 => 'mat'  , 1 => 9 , 2 => 5 , 3 => 3 ) ,
4 => array ( 0 => 'pink' , 1 => 5 , 2 => 5 , 3 => 3 ) ,
5 => array ( 0 => 'joey' , 1 => 5 , 2 => 5 , 3 => 3 ) 
) ;
function sort_keys ($x, $y) {
if ($x['1']>$y['1'])
	return -1;
else if ($x['1']<$y['1'])
	return 1;
if ($x['2']>$y['2'])
	return -1;
else if ($x['2']<$y['2'])
	return 1;
if ($x['3']<$y['3'])
	return -1;
else if ($x['3']>$y['3'])
	return 1;
return 0;
}
uasort ($group, 'sort_keys');
echo '<h3>Who is best?</h3><pre>' . print_r($group, 1) . '</pre>';
$winner = array_shift($group);
echo "<h3>The winner is {$winner['0']}</h3>";
/*
  *Now check if there are people that have the same values
  */
$confirmed = array(0=>array());
foreach ($savedGroup as $member){
foreach ( $savedGroup as $otherMember ){
	if ( $otherMember != $member ) {
		for ($k=1; $k<=3; $k++){
			if ($member["$k"] == $otherMember["$k"]){	//the initial match of stat values
				$match["$member[0]"]["$otherMember[0]"]["$k"] = 'yes';	//add match confirmation of single value to array
				if (count($match["$member[0]"]["$otherMember[0]"])== '3'){	//check that all values are matches, indicating a true match
					for ($m=0; $m<=count($confirmed)-1; $m++){
						if(in_array( "$otherMember[0]", $confirmed["$m"] ) || in_array( "$member[0]", $confirmed["$m"] )){
							$found = $found +1;
						}
					}
					if( $found == 0 ){ //if no previous matches, make new $confirmed array
						static $matchGroup = 0;
						$confirmed["$matchGroup"][] = $member[0];
						$confirmed["$matchGroup"][] = $otherMember[0];
						$matchGroup++;
					}else{
						//add name as key to existing $confirmed array
						for($z=0; $z<=count($confirmed)-1; $z++){
							if(in_array( "$otherMember[0]", $confirmed["$z"] ) || in_array( "$member[0]", $confirmed["$z"] )){
								$confirmed["$z"][] = $member[0];
								$confirmed["$z"][] = $otherMember[0];
							}
						}
						$found = 0;
					}
				}
			}
		}
	}
}
}

for($g=0; $g<=count($confirmed)-1; $g++){
$confirmed["$g"] = array_unique($confirmed["$g"]);
}
$new = array();
for($b=0; $b<=count($confirmed)-1; $b++){
foreach ($confirmed["$b"] as $key => $val){
	$new["$b"][] = $val;
}
}
for($r=0; $r<=count($new)-1; $r++){
echo "<h3>The following members had an instance of complete duplicate stats:</h3>";
echo "<div style='width:200px; background-color:yellow;'>";
for($t=0; $t<=count($new["$r"])-1; $t++){
	echo $new["$r"]["$t"] . "<br>";
}
echo "</div>";
}

?>