调用静态方法时发生致命错误

问题描述

所以，这是我的情况：

• 我正在使用CodeIgniter


• 我已经设置一个助手，（在'DK'文件夹下的'string_helper'）



• 我已经在dk / string_helper.php

• I'm using CodeIgniter
• I've set up a helper, ('string_helper' under 'DK' folder)

• I've set up the dkString class in dk/string_helper.php

static function strInArray($str,$arr)
{
      foreach ($arr as $item)
      {
            if (self::inString($str,$item))
                  return true;
      }

      return false;
}

在我的控制器中：

• 我正在加载帮助程序（ $ this-> load-> helper（'dk / string'）; ）


• 调用方法（ dkString :: strInArray（$ str，$ arr）; ）


• In my controller:
  • I'm loading the helper ($this->load->helper('dk/string');)
  • Calling the method (dkString::strInArray($str,$arr);)

  注意：

  
  
  • 我已经将类的静态方法加载到自定义帮助程序中，如100次。因此，它没有任何问题。
  
  
  • 该函数是否声明为 static 无关紧要。
  
  
  • I've loaded class's static methods residing in a custom helper, like 100 times. So there's nothing wrong with it.
  • It doesn't matter whether the function is declared as static or not. Normally it works, no matter what.

  但是，我一直收到以下错误：

  However, I keep getting the following error :

  任何想法可能有什么问题吗？

  Any ideas what might be wrong?

  <?php
  
  /*
   * DK4PHP Library
   *
   * Copyright (c) 2010-2012 by Dr.Kameleon
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published
   * by the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  if (!class_exists('dkString'))
  {
      class dkString
      {
      /**
       * Return number of character in string
       *
       * @param type $str
       * @return type
       */
  
      function characterCount($str)
      {
          return strlen($str);
      }
  
      /**
       * Check if str begins with...
       * @param type $str
       * @param type $sub
       * @return type
       */
  
      function beginsWith($str, $sub)
      {
          return (substr($str,0,strlen($sub)) == $sub);
      }
  
      /**
       * Check if str ends with...
       *
       * @param type $str
       * @param type $sub
       * @return type
       */
  
      function endsWith($str, $sub)
      {
          return (substr($str,strlen($str)-strlen($sub)) == $sub);
      }
  
      /**
       * Check if str contains substring
       *
       * @param type $sub
       * @param type $str
       * @param type $casesensitive
       * @return type
       */
  
      function inString($sub, $str, $casesensitive = false)
      {
          if ($casesensitive)
          return (strstr($str, $sub) == false) ? false : true;
          else
          return (stristr($str, $sub) == false) ? false : true;
      }
  
      /**
       * Count number of occurences of substring in string
       *
       * @param type $sub
       * @param type $str
       * @return type
       */
  
      function inStringCount($sub, $str)
      {
          return substr_count($str, $sub);
      }
  
      /**
       * Convert string to number
       *
       * @param type $str
       * @param type $check
       * @param type $magic
       * @return type
       */
  
      function strtonum($str, $check, $magic)
      {
          $int32Unit = 4294967296;
  
          $length = strlen($str);
          for ($i = 0; $i < $length; $i++)
          {
          $check *= $magic;
          if ($check >= $int32Unit)
          {
              $check = ($check - $int32Unit * (int) ($check / $int32Unit));
  
              $check = ($check < -2147483648) ? ($check + $int32Unit) : $check;
          }
          $check += ord($str{$i});
          }
          return $check;
      }
  
      /**
       * Get index of str in array (check if is contained)
       *
       * @param type $str
       * @param type $arr
       */
  
      function indexInArray($str,$arr)
      {
          foreach ($arr as $index=>$item)
          {
          if (stristr($item,$str))
          {
              return ($index+1);
              break;
          }
          }
          return -1;
      }
  
      /**
       * Check if str is contained in any of array's elements
       *
       * @param type $str
       * @param type $arr
       * @return boolean
       */
  
      function strInArray($str,$arr)
      {
  
          foreach ($arr as $item)
          {
              if (self::inString($str,$item))
                  return true;
  
          }
  
          return false;
      }
      }
  }
  ?>
  

  更新：

  在我的控制器中，加载了辅助程序（ $ this-> load-> helper（'dk / string'）; ）之后，我尝试了：

  In my controller, after loading the helper ($this->load->helper('dk/string');), I tried :

  if (class_exists('dkString')) { echo "IT EXISTS<br/>Methods : "; print_r(get_class_methods('dkString')); }
  else echo "IT DOESN'T EXIST";
  

  有趣的事情是输出为：

  IT EXISTS
  Methods : Array (
  [0] => characterCount
  [1] => beginsWith
  [2] => endsWith
  [3] => inString
  [4] => inStringCount
  [5] => strtonum
  [6] => indexInArray )
  

  简而言之：该类已加载，并且看到了所有方法（除了最后一个）。 Geezz ...：/

  In a few words : the class IS loaded, and it "sees" ALL methods (except for the last one). Geezz... :/

  推荐答案

  尝试使公开 功能。

  public static function strInArray($str,$arr) {
      foreach ($arr as $item) {
          if (self::inString($str,$item))
              return true;
      }
  
      return false;
  }
  

  编辑：您的口译员可以找不到班级。然后他找不到静态方法。也许您可以与 class_exists 一起检查课程，然后上课。

  Its possible that your interpreter can't find the class. Then he can't find the static method. Perhaps you can check with class_exists wheather the class is there and loaded.

  Edit2：
  您必须将您的函数声明为静态函数。否则，您将无法使用静态运算符（：:)调用该函数。

  You have to declare you function as static function. Otherwise you cannot call the function with the static operator(::).

  没有人在聊天...但是错误消息非常明确。您尝试调用静态函数，但该函数不是静态函数，因此您得到的信息就很重要。

  So no one is in chat... but the error message is really clear. You try to call a static function but that function is not a static function so you get the message you get on top.

  否则，将它们作为实例上的函数进行调用

  Otherwise call them as a function over an instance

  $dkString = new dkString;
  $res = $dfString->strInArray();
  

  使用内部功能如 来查找数组中的字符串。

  Perhaps its easier when you use internal functions like in_array to find a string in an array.

  这篇关于调用静态方法时发生致命错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！