<?php
$input = array(
    array('w'=>10,'r'=>10,'e'=>489),
    array('w'=>10,'r'=>10,'e'=>489),
    array('w'=>10,'r'=>10,'e'=>489),
    array('w'=>20,'r'=>20,'e'=>489),
    array('w'=>10,'r'=>10,'e'=>''),
 
    );
 
 
$result = array_map("unserialize", array_unique(array_map("serialize", $input)));
foreach ($result as &$arr) {
    $cnt = 0;
    foreach ($input as $inArr) {
        if ($arr == $inArr) {
            $cnt++;
        }
    }
    if ($cnt > 1) {
        $arr['duplicates'] = $cnt - 1;
    }
}
print_r($result);
?>
 
 

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