Unset pairs if match and never be repeated

Question

How can I unset pairs if match?

 $pair = array(
                  array('number' => 1000),
                  array('number' => 2000),
                  array('number' => 3000),
                  array('number' => 2000),
                  array('number' => 2000)
                 );
if(sizeof($pair) >= 2) {
    $i = 1;
    $pair_A  = $pair[0];
    while(sizeof($pair) > $i) {
       $pair_B = $pair[$i];
       if($pair_A['number']  == $pair_B['number']) {
           //with match
       } else {
           //no match
       }
       $i++;
       unset($pair_B);
    }
    unset($pair_A);
}

The variable $pair_A value is always repeated even though I unset it.

I want to have a result which is paired by two:

1. No Match = 1000   empty
2. Match with #4 = 2000  2000
3. No Match = 3000   empty
4. Match with #2 = 2000 2000
5. No Match = 2000 empty

If match, the corresponding value will also match like #2 and #3 (vice versa matching I guess).

Is this possible? Please help me I am having trouble in this flow several months already... I hope you can help me.

Do you want to unset the whole array or just the specific value? — Darren, Oct 01 '13 at 08:38
@Robert my target is to save them on a database with matching pair e.g. Lakers vs Bulls, Bulls vs Lakers. both of them will have one row to be inserted. — Shudmeyer, Oct 01 '13 at 08:42
@Robert array_unique() doesn't work on multi-dimensional arrays — Mina, Oct 01 '13 at 08:42
In `4. Match with #2 = 2000 2000` `#2` should be `#1` am I right? — MD SHAHIDUL ISLAM, Oct 01 '13 at 11:44
@Kyra http://stackoverflow.com/questions/307674/how-to-remove-duplicate-values-from-a-multi-dimensional-array-in-php — Robert, Oct 01 '13 at 12:42

MD SHAHIDUL ISLAM · Accepted Answer · 2013-10-02T06:59:30.787

0

Your required output will come here.

<?php
$pair = array(
            array('number' => 1000),
            array('number' => 2000),
            array('number' => 3000),
            array('number' => 2000),
            array('number' => 2000)
           );

foreach($pair as $key1=>$array1) {
    $isMatched = false;
    foreach($pair as $key2=>$array2) {
        if($key1!=$key2 && $array1["number"]==$array2["number"]) {
            $key = $key2+1;
            $pair[$key2]["number"] = "";
            $data = "Match with #$key $array1[number] $array2[number]";
            $isMatched = true;
            break;
        }
    }

    $key1++;
    if($isMatched) {
        echo $key1.". ".$data."<br>";   
    } else {
        echo $key1.". No Match = $array1[number] empty"."<br>";
    }
}
?>

Output:

1. No Match = 1000 empty
2. Match with #4 2000 2000
3. No Match = 3000 empty
4. Match with #2 2000 2000
5. No Match = 2000 empty

edited Oct 02 '13 at 06:59

answered Oct 01 '13 at 12:34

MD SHAHIDUL ISLAM

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hi @Salim. this is the correct format. 2. Match with #4 2000 2000 and 4. Match with #2 2000 2000. if match two records will be paired vice versa. – Shudmeyer Oct 02 '13 at 06:48
Ok, I have said it because array item starts from index 0, so it is corrected now, it is working as you expect. – MD SHAHIDUL ISLAM Oct 02 '13 at 07:01
thank you very much @Salim it works. what is the purpose of $roosters[$key2]["weight"] = "";? how can also add reputations to your account? – Shudmeyer Oct 02 '13 at 07:32
You can vote to this answer and also can select as best answer. – MD SHAHIDUL ISLAM Oct 02 '13 at 08:03

Unset pairs if match and never be repeated

1 Answers1