记laravel项目,本地环境PHP7.1,线上PHP版本7.2,报错each函数废弃问题

the each() function is deprecated. this message will be suppressed on further calls laravel 

 例子1:

php7.1写法

      if ( is_array( $u ) ) {
                 while( list( $key ) = each( $u ) ) {
                      $u = $u[$key];
                     break;
                  }
              }
  
 

改为php7.2写法

      if ( is_array( $u ) ) {
               $u = current($u);
              }
  
 

As PHP7.2 says, I suggest to use foreach() function as a substitute of deprecated each(). Here I let a couple of examples that works to me in Wordpress.----正如PHP7.2所说，我建议使用foreach（）函数来替代已弃用的each（）。这里我举几个在Wordpress中对我有用的例子。

      (OLD) while ( list( $branch, $sub_tree ) = each( $_tree ) ) {...}
      (NEW) foreach ( (Array) $_tree as $branch => $sub_tree ) {...}
      (OLD) while ( $activity = each( $this->init_activity ) ) {...}
      (NEW) foreach ( $this->init_activity as $activity ) {...}
      (old)while(list($file, $info) = each($this->images))
      (new)foreach($this->images as $file => $info) {
         // ...
      }
  
 

例子2 

      16548 while (list($id, $name) = each($attr_array[1])) {  //7.1
      I replaced the line with the next code in both lines and it worked,替换为如下
      foreach($attr_array[1] as $id => $name) {  //7.2
  
 

例子3:我的例子:支付过程中生成签名时出现错误 

      public function createLinkString($param)
          {
             $arg = "";
              //数组排序
              ksort($param);
              reset($param);
              //7.1写法
              /*while (list ($key, $val) = each($param)) {
                 if ($key == "sign") continue;
                 if (!empty($key)) {
                     $arg .= $key . "=";
                  }
                 if (is_array($val)) {
                     $arg .= $this->createLinkString($val) . "&";
                  } else {
                     $arg .= $val . "&";
                  }
              }*/
              //7.2写法
              foreach ($param as $key => $val) {
                 if ($key == "sign") continue;
                 if (!empty($key)) {
                     $arg .= $key . "=";
                  }
                 if (is_array($val)) {
                     $arg .= $this->createLinkString($val) . "&";
                  } else {
                     $arg .= $val . "&";
                  }
              }
              //去掉最后一个&字符
             $arg = substr($arg, 0, strlen($arg) - 1);
             return $arg;
          }
  
 

参考:php 7.2 each() function is deprecated

文章来源: blog.csdn.net，作者：lxw1844912514，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/lxw1844912514/article/details/108755853