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  1. <?php
  2. foreach ($ary=array("○", "○", "○", "△", "△", "☓") as $val1)
  3. 	foreach ($ary as $val2)
  4. 		$a[$x=$val1>$val2?$val1.$val2:$val2.$val1] = isset($a[$x]) ? ++$a[$x] : 1;
  5. arsort($a);
  6. print_r($a);
Success #stdin #stdout 0.01s 20520KB
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Standard input is empty
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Array
(
    [○△] => 12
    [○○] => 9
    [☓○] => 6
    [△△] => 4
    [☓△] => 4
    [☓☓] => 1
)
https://ideone.com/htCIiy
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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