array_diff函数的注意事项

array_diff — 计算数组的差集

　　说明：

array array_diff ( array $array1 , array $array2 [, array $... ] )　　对比返回在 array1 中但是不在 array2 及任何其它参数数组中的值。注意键名保留不变。

　　注意：本函数只检查了多维数组中的一维。如果想比较更深的维度需要另写一个函数，今天的工作就遇到了这样的需求，所以写了一个函数来比较更深的维度。

php
header("Content-type:text/html;charset=utf-8");
$json1='{ "filedir":"default", "pages" : [ { "name" : "首页", "blocks":[ { "name":"头部标题栏", "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":"头部广告图", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"广告", "blocktype":"ad", "settings":{ "is_show":true, "number":5, "show_type":"scroll" } }, { "name":"菜单", "blocktype":"menu", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"个人中心", "blocktype":"personal_center", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"上网按钮", "blocktype":"online_button", "settings":{ "is_show":true, "offline_bg_url":"", "online_bg_url":"" } } ] }, { "name" : "登录页", "blocks":[ { "name":"页面背景", "blocktype":"page_bg", "settings":{ "is_show":true, "bg_url":"", "bg_color":"" } }, { "name":"logo图", "blocktype":"logo", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"登录模块", "blocktype":"login", "settings":{ "is_show":true, "success_url":"" } } ] }, { "name" : "认证过程页", "duration":"5", "blocks":[ { "name":"页面背景", "blocktype":"page_bg", "settings":{ "is_show":false, "bg_url":"" } }, { "name":"登录动画", "blocktype":"login_animate", "settings":{ "is_show":true, "bg_url":"" } } ] }, { "name" : "登录成功页", "blocks":[ { "name":"头部广告图", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"成功页app", "blocktype":"apps", "settings":{ "is_show":true } }, { "name":"成功页提示信息", "blocktype":"success_tips", "settings":{ "is_show":false, "color":"#fff", "content":"" } } ] }, { "name" : "广告细览页", "blocks":[ { "name":"头部标题栏", "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" : "首页", "blocks":[ { "name":"头部标题栏", "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":"头部广告图", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"广告", "blocktype":"ad", "settings":{ "is_show":true, "number":5, "show_type":"scroll" } }, { "name":"菜单", "blocktype":"menu", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"个人中心", "blocktype":"personal_center", "settings":{ "is_show":true, "bg_color":"#fff", "color":"#1eb7a4" } }, { "name":"上网按钮", "blocktype":"online_button", "settings":{ "is_show":true, "offline_bg_url":"", "online_bg_url":"" } } ] }, { "name" : "登录页", "blocks":[ { "name":"页面背景", "blocktype":"page_bg", "settings":{ "is_show":true, "bg_url":"", "bg_color":"" } }, { "name":"logo图", "blocktype":"logo", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"登录模块", "blocktype":"login", "settings":{ "is_show":true, "success_url":"" } } ] }, { "name" : "认证过程页", "duration":"5", "blocks":[ { "name":"页面背景", "blocktype":"page_bg", "settings":{ "is_show":false, "bg_url":"" } }, { "name":"登录动画", "blocktype":"login_animate", "settings":{ "is_show":true, "bg_url":"" } } ] }, { "name" : "登录成功页", "blocks":[ { "name":"头部广告图", "blocktype":"ad_picture", "settings":{ "is_show":true, "bg_url":"" } }, { "name":"成功页app", "blocktype":"apps", "settings":{ "is_show":true } }, { "name":"成功页提示信息", "blocktype":"success_tips", "settings":{ "is_show":false, "color":"#fff", "content":"" } } ] }, { "name" : "广告细览页", "blocks":[ { "name":"头部标题栏", "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';
}

                
                
                

                    以上就介绍了array_diff函数的注意事项，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。