array_diff函數的注意事項

array_diff — 計算數組的差集

　　說明：

array array_diff ( array $array1 , array $array2 [, array $... ] )　　對比返回在 array1 中但是不在 array2 及任何其它參數數組中的值。注意鍵名保留不變。

　　注意：本函數只檢查了多維陣列中的一維。如果想比較更深的維度需要另寫一個函數，今天的工作就遇到了這樣的需求，所以寫了一個函數來比較更深的維度。

phpheader("Content-type:text/html;charset=utf-8");$json1='{ "filedir":"default", "pages" : [ { "name" : "首頁", "blocks":[ { "name":"頭部標題列", "blocktype":"title_bar", "settings":{ "is_show":true, "bg_color":"#1eb7a4", "content_switch":true, "content":"", "bg_url":"", "color":"#fff", "border_bottom_color":"", "border_bottom_width":"0" } }, { "name":"頭部廣告圖", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"廣告", "blocktype":"ad", "settings":{ "is_show":true, "number":5, "show_type":"scroll" } }, { "name":"菜單", "blocktype":"menu", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"個人中心", "blocktype":"personal_center", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"上網按鈕", "blocktype":"online_button", "settings":{ "is_show":true, "offline_bg_url":"", "online_bg_url":"" } } ] }, { "name" : "登入頁", "blocks":[ { "name":"頁面背景", "blocktype":"page_bg", "settings":{ "is_show":true, "bg_url":"", "bg_color":"" } }, { "name":"logo圖", "blocktype":"logo", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"登入模組", "blocktype":"login", "settings":{ "is_show":true, "success_url":"" } } ] }, { "name" : "認證過程頁", "duration":"5", "blocks":[ { "name":"頁面背景", "blocktype":"page_bg", "settings":{ "is_show":false, "bg_url":"" } }, { "name":"登入動畫", "blocktype":"login_animate", "settings":{ "is_show":true, "bg_url":"" } } ] }, { "name" : "登入成功頁", "blocks":[ { "name":"頭部廣告圖", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"成功頁app", "blocktype":"apps", "settings":{ "is_show":true } }, { "name":"成功頁提示資訊", "blocktype":"success_tips", "settings":{ "is_show":false, "color":"#fff", "content":"" } } ] }, { "name" : "廣告細覽頁", "blocks":[ { "name":"頭部標題列", "blocktype":"title_bar", "settings":{ "is_show":true, "bg_color":"#1eb7a4", "content_switch":true, "content":"", "bg_url":"", "color":"#fff", "border_bottom_color":"", "border_bottom_width":"0" } } ] } ] }';$json2='{ "filedir":"default", "pages" : [ { "name" : "首頁", "blocks":[ { "name":"頭部標題列", "blocktype":"title_bar", "settings":{ "is_show":true, "bg_color":"#1eb7a4", "content_switch":true, "content":"", "bg_url":"", "color":"#fff", "border_bottom_color":"", "border_bottom_width":"0" } }, { "name":"頭部廣告圖", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"廣告", "blocktype":"ad", "settings":{ "is_show":true, "number":5, "show_type":"scroll" } }, { "name":"菜單", "blocktype":"menu", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"個人中心", "blocktype":"personal_center", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"上網按鈕", "blocktype":"online_button", "settings":{ "is_show":true, "offline_bg_url":"", "online_bg_url":"" } } ] }, { "name" : "登入頁", "blocks":[ { "name":"頁面背景", "blocktype":"page_bg", "settings":{ "is_show":true, "bg_url":"", "bg_color":"" } }, { "name":"logo圖", "blocktype":"logo", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"登入模組", "blocktype":"login", "settings":{ "is_show":true, "success_url":"" } } ] }, { "name" : "認證過程頁", "duration":"5", "blocks":[ { "name":"頁面背景", "blocktype":"page_bg", "settings":{ "is_show":false, "bg_url":"" } }, { "name":"登入動畫", "blocktype":"login_animate", "settings":{ "is_show":true, "bg_url":"" } } ] }, { "name" : "登入成功頁", "blocks":[ { "name":"頭部廣告圖", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"成功頁app", "blocktype":"apps", "settings":{ "is_show":true } }, { "name":"成功頁提示資訊", "blocktype":"success_tips", "settings":{ "is_show":false, "color":"#fff", "content":"" } } ] }, { "name" : "廣告細覽頁", "blocks":[ { "name":"頭部標題列", "blocktype":"title_bar", "settings":{ "is_show":true, "bg_color":"#1eb7a4", "content_switch":true, "content":"", "bg_url":"", "color":"#fff", "border_bottom_color":"", "border_bottom_width":"0" } } ] } ] }';$array1=json_decode($json1,true);$array2=json_decode($json2,true);function array_recursive_diff($array1, $array2) {    $result = array();    foreach ($array1as$key1 => $value1) {        if (array_key_exists($key1, $array2)) {            if (is_array($value1)) {                $diff = array_recursive_diff($value1, $array2[$key1]);                if (count($diff)) {                    $result[$key1] = $diff;                }            } else {                if ($value1 != $array2[$key1]) {                    $result[$key1] = $value1;                }            }        } else {            $result[$key1] = $value1;        }    }    return$result;}$result=array_recursive_diff($array1, $array2);echo '
';var_dump($result);if(empty($result)){    echo '完全相同';}else{    echo '完全不相同';}
                                                
                    以上就介紹了array_diff函數的注意事項，包括了方面的內容，希望對PHP教程有興趣的朋友有所協助。
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