PHP implementation code for obtaining repeated data in an array

function FetchRepeatMemberInArray($array) {
 // Get an array with duplicate data removed
 $unique_arr = array_unique ( $array );
 // Get an array with duplicate data
 $repeat_arr = array_diff_assoc ( $array, $unique_arr );
 return $repeat_arr;
}

// Test case
$array = array (
 'apple',
 'iphone',
 'miui',
 'apple',
 'orange' ,
 'orange'
);
$repeat_arr = FetchRepeatMemberInArray ( $array );
print_r ( $repeat_arr );

?>

Example 2, use two custom functions to implement this function times for loop.

function FetchRepeatMemberInArray($array) {
 $len = count ( $array );
 for($i = 0; $i < $len; $i ++) {
 for($j = $i + 1; $j < $len; $j ++) {
 if ($array [$i] == $array [$j]) {
 $repeat_arr [] = $array [$i];
 break;
 }
 }
 }
 return $repeat_arr;
}

// Test case
$array = array (
 'apple',
 'iphone',
 'miui',
 ' apple',
 'orange',
 'orange'
);
$repeat_arr = FetchRepeatMemberInArray ( $array );
print_r ( $repeat_arr );
?>

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