PHPで配列内の繰り返しデータを取得する手順を詳しく解説

<?php 
function FetchRepeatMemberInArray($array) { 
    // 获取去掉重复数据的数组 
    $unique_arr = array_unique ( $array ); 
        // 获取重复数据的数组 
    $repeat_arr = array_diff_assoc ( $array, $unique_arr ); 
    return $repeat_arr; 
}

// 测试用例 
$array = array ( 
        &#39;apple&#39;, 
        &#39;iphone&#39;, 
        &#39;miui&#39;, 
        &#39;apple&#39;, 
        &#39;orange&#39;, 
        &#39;orange&#39;  
);  www.jbxue.com
$repeat_arr = FetchRepeatMemberInArray ( $array ); 
print_r ( $repeat_arr ); 
?>

<?php 
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; 
}
// 测试用例 
$array = array ( 
        &#39;apple&#39;, 
        &#39;iphone&#39;, 
        &#39;miui&#39;, 
        &#39;apple&#39;, 
        &#39;orange&#39;, 
        &#39;orange&#39;  
); 
$repeat_arr = FetchRepeatMemberInArray ( $array ); 
print_r ( $repeat_arr ); 
?>