Php 无法在foreach中选择和回显阵列

Php 无法在foreach中选择和回显阵列,php,Php,数据库有一行4列。我选择了两列,名字和姓氏。我通过db类中的一个select函数传递了它,结果如何,但它不会回显 数据库类 <?php /* this script is for creating a class to connect to the database */ include "includes/config.php"; class database { protected static $connection; // variable to hold

数据库有一行4列。我选择了两列,名字和姓氏。我通过db类中的一个select函数传递了它,结果如何,但它不会回显

数据库类

<?php
  /* this script is for creating a class to connect to the database */

  include "includes/config.php";

  class database {
    protected static $connection; // variable to hold the mysqli connection


  protected function connect(){
      if (!isset(self::$connection)){ // if the connection variable is not set
          self::$connection = new mysqli(SERVER_NAME, USERNAME, PASSWORD, DB_NAME); // set the connection
      }
      if (self::$connection === false){ //in case connection failed return false
        return false;
      }
      else {
        return self::$connection; // returns the connection
      }
    }



    protected function query($query){ // public function to take a sql query
      $connection = $this->connect(); // calls the connect function to create a connection to the database
      $result = $connection->query($query); // puts the query into the result variable
      return $result; //returns the result
    }



    public function select($query){
      $rows = array();
      $result = $this->query($query);
      if($result === false){
        return false;
      }
      while($row = $result->fetch_assoc()){
            $rows[] = $row;
            }
        return $rows;
    }



    public function error(){
      $connection = $this->connect();
      return $connection->error;
    }
  }
?>

以及带有foreach循环的脚本

<?php

  include 'view/header.php';
  include 'includes/connect.php';

  $db = new database();

  $sql = "SELECT `first_name`, `last_name` FROM `pratts_db`
          WHERE `first_name` = `clive`;";

  $result = $db->select($sql);

  if (sizeof($result) >= 1){
    echo "query successful";
    foreach($result as $result){
      echo "<p>{$result[0]['first_name']}</p>"
    }
  }

  include 'view/footer.php';

?>

错误是“第17行需要分号,但我把它放进去了,仍然得到了相同的错误。”


分析错误:语法错误,意外的“}”,应为“,”或“;”在第17行的C:\wamp64\www\final\index.php中,在
clive
周围使用单引号,而不是反引号。此外,我在foreach中尝试了调用数组的不同方法。{$result[firstname]},带引号和不带引号,还有你在第一篇博文中看到的
echo“{$result[0]['first_name']}

我注意到了缺少的分号。还是不行。我是新手,所以在foreach的括号中,第一个输入是数组,在本例中,$result,第二个输入只是一个占位符,可以是我想称之为的任何内容,对吗?这是更新的版本。它给出了一个错误,表示为foreach提供的参数无效