我正在尝试使用mysqli_result :: fetch_object方法将存储在我的数据库中的人加载到Person对象中，然后将它们打印存储在一个数组中，以便我可以将该数组作为HTML表打印出来
我继续在第84行的非对象错误上调用成员函数。当我在$ row上执行var_dump时，它会输出NULL。谁能告诉我我做错了什么？
的index.php
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link href ="Stylesheet.css" rel="stylesheet" type="text/css">
<title>Assignment 3</title>
</head>
<body>
<?php
require ('Person.php');
//Making an empty array to store Person objects
$empty = array();
//Defining parameters for mysqli connect functio
$p1 = '2011.ispace.ci.edu';
$p2 = 'username';
$p3 = 'password';
$p4 = 'dbname';
//Connecting to the database and checking to see if it fails
$db = new mysqli($p1, $p2, $p3, $p4);
if ($db->connect_error)
{
echo "Error Connecting:" . " " . $db->connect_error;
}
//Querying the database to get the information from the Person table
else
{
$result = $db->query(
"SELECT *
FROM Person"
);
if($result === false){
printf($db->error);
}
var_dump($result);
//Looping through the rows and storing them in the array
$totalRows = $result->num_rows;
if ($totalRows > 0)
{
$emp = 'Person';
while($row = $result->fetch_object($emp));
{
$empty[] = $row;
$row++;
var_dump($row);
}
}
}
//Making the table headers
echo "<h1>Assignment 3 Incorporated</h1>";
echo "<table>";
echo "<tr>";
echo "<td><strong>Name</strong></td>";
echo "<td><strong>Title</strong></td>";
echo "<td><strong>Office</strong></td>";
echo "<td><strong>Phone Number</strong></td>";
echo "<td><strong>Email</strong></td>";
echo "</tr>";
//Printing out the table with foreach loop
foreach ($empty as $newPerson) {
echo "<tr>";
echo "<td>" . $newPerson-> getfirstName() . " " . $newPerson-> getlastName() . "</td>";
echo "<td>" . $newPerson-> gettitle() . "</td>";
echo "<td>" . $newPerson-> getoffice() . "</td>";
echo "<td>" . $newPerson-> getphoneNumber() . "</td>";
echo "<td><a href='mailto:" . $newPerson-> getemail() . "'>" . $newPerson-> getemail() . "</a></td>";
echo "</tr>";
}
echo "</table>";
?>
</body>
</html>
Person.php
<?php
class Person {
private $firstName;
private $lastName;
private $title;
private $office;
private $phoneNumber;
private $email;
//private $data;
//Constructor
/* public function __construct($name)
{
$this-> setname($name);
}
*/
//Interface Methods
//Get/Set Name
public function setname($name)
{
//using explode function to split name into 2 strings
$this-> name = $name;
if(is_string($name)) {
list($lastName, $firstName) = explode(",",$this -> name);
$this->firstName = $firstName;
$this->lastName = $lastName;
}
else {
user_error('Error: Persons Name Must Be a String!');
}
}
public function getfirstName()
{
return $this-> firstName;
}
public function getlastName()
{
return $this-> lastName;
}
public function getname()
{
/**
$nameSplit = explode(",",$this ->name);
foreach ($nameSplit[1] as $firstName);
foreach ($nameSplit[0] as $lastName);
echo $firstName . "," . $lastName;
return $this-> name;
**/
}
//Get/Set Title
public function settitle($title)
{
$this-> title = $title;
}
public function gettitle()
{
return $this-> title;
}
//Get/Set office
public function setoffice($office)
{
$this-> office = $office;
}
public function getoffice()
{
return $this-> office;
}
//Get/Set phone number
public function setphoneNumber($phoneNumber)
{
$this-> phoneNumber = $phoneNumber;
}
public function getphoneNumber()
{
//str_replace to modify phone number format
if(is_string($this-> phoneNumber)) {
$find3 = array (')', '(', ' ');
$replace3 = array ('', '', '-');
$phonestr = str_replace($find3, $replace3, $this-> phoneNumber);
return $phonestr;
}
else {
return user_error("Error: Person's phone number must be a string");
}
}
//Get/Set email
public function setemail($email)
{
$this-> email = $email;
}
public function getemail()
{
return $this-> email;
}
}
?>
答案 0 :(得分：0)
您不需要多个循环......
if ($totalRows > 0) {
$emp = 'Person';
while ( $row = $result->fetch_object($emp) )
{
$newPerson = new person($row);
echo "<tr>";
echo "<td>" . $newPerson->getfirstName() . " " . $newPerson->getlastName() . "</td>";
echo "<td>" . $newPerson->gettitle() . "</td>";
echo "<td>" . $newPerson->getoffice() . "</td>";
echo "<td>" . $newPerson->getphoneNumber() . "</td>";
echo "<td><a href='mailto:" . $newPerson->getemail() . "'>" . $newPerson->getemail() . "</a></td>";
echo "</tr>";
}
}
您的类构造函数应该如下所示
class Person {
private $firstName;
private $lastName;
private $title;
private $office;
private $phoneNumber;
private $email;
public function __construct($row) {
$this-> setname($row->firtname);
$this-> settitle($row->title);
//And So on ...
}
.... So On
最后....不要总是删除问题并将其发回去。总是在某些时候提出问题肯定会得到回答