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	`1`	`+<?php`
	`2`	`+class Solution`
	`3`	`+{`
	`4`	`+ /**`
	`5`	`+ * @param Integer[] $nums`
	`6`	`+ * @param Integer $k`
	`7`	`+ * @return Integer`
	`8`	`+ */`
	`9`	`+ public function countPairs($nums, $k)`
	`10`	`+ {`
	`11`	`+ $count = 0;`
	`12`	`+ $n = count($nums);`
	`13`	`+`
	`14`	`+ for ($i = 0; $i < $n; $i++) {`
	`15`	`+ for ($j = $i + 1; $j < $n; $j++) {`
	`16`	`+ if ($nums[$i] == $nums[$j] && ($i * $j) % $k == 0) {`
	`17`	`+ $count++;`
	`18`	`+ }`
	`19`	`+ }`
	`20`	`+ }`
	`21`	`+ return $count;`
	`22`	`+ }`
	`23`	`+}`
	`24`	`+`
	`25`	`+$solution = new Solution();`
	`26`	`+$nums = [1, 2, 3, 1, 1, 3];`
	`27`	`+$k = 2;`
	`28`	`+$result = $solution->countPairs($nums, $k);`
	`29`	`+`
	`30`	`+echo "The number of equal and divisible pairs is: " . $result . "\n"; // Output: 4`

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