in_array无法检查php中的数组值 [英] in_array failed to check array value in php

问题描述

我正在建立一个PHP用户权限系统，其中与特定角色相关的所有权限都像数组一样保存在会话中，但是当我尝试检查时，数组中已经存在该值并不正确.

I am making a PHP user permission system where all permission related to specific role are saved in session as like array but when I try to check the it does not true where already the value exists in array.

这是我的会话数组 $ _ SESSION ['userPermissions'] = $ userPermissions; 这是 $ _ SESSION ['userPermissions']

Here is my session array $_SESSION['userPermissions'] = $userPermissions; here is the var_dump of $_SESSION['userPermissions']

输出

You are now logged inarray(6) { [0]=> array(1) { ["permission_name"]=> string(11) "create-role" } [1]=> array(1) { ["permission_name"]=> string(11) "update-role" } [2]=> array(1) { ["permission_name"]=> string(11) "delete-role" } [3]=> array(1) { ["permission_name"]=> string(11) "create-user" } [4]=> array(1) { ["permission_name"]=> string(11) "update-user" } [5]=> array(1) { ["permission_name"]=> string(11) "delete-user" } }

我使用波纹管功能检查阵列值

I use bellow function to check array value

 // checks if user can delete an user
  function canDeleteUser() {
    if(in_array('delete-user', $_SESSION['userPermissions'])){
      return true;
    } else {
      return false;
    }
  }

它总是返回false，请帮助我

it always return false please help me

推荐答案

为使代码正常工作，您需要具有 userPermissions 数组，如下所示:

In order for your code to work you would need to have your userPermissions array to look as follows:

[ 
   'create-role',
   'delete-user',
   ...the rest...
]

实际上，您的数组如下所示:

while in fact your array look as follows:

[ 
   ['permission_name' => 'create-role'],
   ['permission_name' => 'delete-user'],
   ...the rest...
]

为了搜索嵌套值，首先提取列:

in order to search for a nested value extract first the column:

if(in_array('delete-user', array_column($_SESSION['userPermissions`], 'permission_name'))){

或按数组搜索:

if(in_array(["permission_name"=>"delete-user"], $_SESSION['userPermissions`]))

但是请注意，第二种方法的安全性要差得多:好像数组将更改(将具有其他元素)，这将失败.我强烈建议您使用第一种方法.

yet be aware that the second approach is much less secure: as if the array will change (will have other elements) this will fail. I strongly advise to use the first approach.

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