我有一个PHP 5.6兼容脚本。现在在我的服务器上，我必须更改为php7.2，但是此脚本到处都出错。我想自己进行转换，但是我的知识还不够多。我一直在通过一些教程逐步推进，但是我已经陷入困境而无法继续。
我需要帮助才能自己完成。这只是代码的一个示例，但是通过解决这个问题，我认为我将能够转换整个网站。
错误：
[01-Nov-2018 09:16:58 UTC] PHP Fatal error: Uncaught Error: Call to a member function query() on null in /home/xxxx/public_html/incs/generales/fullnews.php:433
Stack trace:
#0 /home/xxxx/public_html/news.php(16): FullNewsInc->getFullNews('18880', 'fullnews')
#1 {main}
thrown in /home/xxxx/public_html/incs/generales/fullnews.php on line 433
news.php页面
<?php
require_once './db.php'; $db = new DB_Sql(); $db2 = new DB_Sql();
include_once './fullnews.php';
$fullnewsinc = new FullNewsInc($db);
$newsId = $_REQUEST['newsId'];
$system = $_REQUEST['system'];
$cat = $_REQUEST['categorie'];
?>
<section id="main-content" itemscope itemtype="https://schema.org/Article">
<div id="latest">
<section class="noticias">
<div class="clearfix"></div>
<?php $fullnewsinc->getFullNews($newsId, 'fullnews'); ?>
</section>
<aside class="sidebar">
</aside>
</div> <!-- END Latest -->
<div class="clearfix"></div>
</section>
这是fullnews.php中的功能
<?php
class FullNewsInc {
var $db;
public function __construct()
{
// Constructor's functionality here, if you have any.
}
public function FullNewsInc(&$db) {
$this->db = &$db; self::__construct();
}
function getFullNews($newsId = '', $template = 'theme_fullnews') {
$sql = "SELECT x FROM";
$this->db->query($sql);
while($this->db->next_record()) {
$newsId = $this->db->f("newsId");
$subject = $this->db->f("subject");
$shortNews = $this->db->f("shortNews");
$longNews = $this->db->f("longNews");
$iconId = $this->db->f("iconId");
$source = $this->db->f("source");
include "./theme/".$template.".tpl.php";
}
}
}?>
这是db.php
<?php
if (!class_exists('DB_Sql')){
class DB_Sql {
public function __construct()
{
// Constructor's public functionality here, if you have any.
}
public $Host = "xxx";
public $Database = "xxxx";
public $User = "xxx";
public $Password = "xxxxx";
public $Auto_Free = 1;
public $Debug = 0;
public $Halt_On_Error = "no"; // "yes", "no", "report"
public $Record = array();
public $Row;
public $Errno = 0;
public $Error = "";
public $Link_ID = 0;
public $Query_ID = 0;
public function DB_Sql($query = "") {
$this->query($query);self::__construct();
}
public function link_id() {
return $this->Link_ID;self::__construct();
}
public function query_id() {
return $this->Query_ID;self::__construct();
}
public function connect($Database = "", $Host = "", $User = "", $Password = "") {
if ("" == $Database)
$Database = $this->Database;
if ("" == $Host)
$Host = $this->Host;
if ("" == $User)
$User = $this->User;
if ("" == $Password)
$Password = $this->Password;
if ( 0 == $this->Link_ID ) {
$this->Link_ID=@mysqli_connect($Host, $User, $Password, $Database);
if (!$this->Link_ID) {
$this->halt("connect failed - Please check your database settings.");
die;
}
if (!@mysqli_select_db($Database,$this->Link_ID)) {
$this->halt("cannot use database ".$this->Database." - Please check your database settings.");
die;
}
}
return $this->Link_ID;
}
public function free() {
@mysql_free_result($this->Query_ID);
$this->Query_ID = 0;self::__construct();
}
public function query($Query_String) {
if ($Query_String == "") {
return 0;
}
if (!$this->connect()) {
return 0;
}
# New query, discard previous result.
if ($this->Query_ID) {
$this->free();
}
if ($this->Debug)
printf("Debug: query = %s<br />\n", $Query_String);
$this->Query_ID = @mysqli_connect($Query_String,$this->Link_ID);
$this->Row = 0;
$this->Errno = mysql_errno();
$this->Error = mysql_error();
if (!$this->Query_ID) {
$this->halt("Invalid SQL: ".$Query_String);
}
return $this->Query_ID;self::__construct();
}
public function next_record() {
if (!$this->Query_ID) {
$this->halt("next_record called with no query pending.");
return 0;
}
$this->Record = @mysqli_fetch_array($this->Query_ID);
$this->Row += 1;
$this->Errno = mysql_errno();
$this->Error = mysql_error();
$stat = is_array($this->Record);
if (!$stat && $this->Auto_Free) {
$this->free();
}
return $stat;self::__construct();
}
public function affected_rows() {
return @mysql_affected_rows($this->Link_ID);self::__construct();
}
public function num_rows() {
return @mysql_num_rows($this->Query_ID);self::__construct();
}
public function num_fields() {
return @mysql_num_fields($this->Query_ID);self::__construct();
}
public function nf() {
return $this->num_rows();self::__construct();
}
public function np() {
print $this->num_rows();self::__construct();
}
public function f($Name) {
return $this->Record[$Name];self::__construct();
}
public function p($Name) {
print $this->Record[$Name];self::__construct();
}
public function halt($msg) {
$this->Error = @mysqli_error($this->Link_ID);
$this->Errno = @mysqli_errno($this->Link_ID);
if ($this->Halt_On_Error == "no")
return;
$this->haltmsg($msg);
if ($this->Halt_On_Error != "report")
die("Session halted.");self::__construct();
}
public function haltmsg($msg) {
printf("<b>Database error:</b> %s<br />\n", $msg);
printf("<b>MySQL Error</b>: %s (%s)<br />\n",
$this->Errno,
$this->Error);self::__construct();
}
}
}
theme_fullnews模板：
<article>
<header>
<h1 itemprop="name" ><?php echo $subject; ?></h1>
<h2 itemprop="articleSection"><?php echo $shortNews; ?></h2>
<span itemprop="datePublished" content=" <?php echo $newDate; ?>"> <?php echo time_elapsed_string($timestamp); ?> </span>
</div>
</header>
<section>
<?php $longNews); ?>
</section>
</article>
答案 0 :(得分：0)
这里发生的是，您的类中具有与该类同名的函数。 PHP向您发出警告，将来会删除此功能。
例如，您有自己的php类
<?php
class FullNewsInc {
public function __construct( )
{
// Constructor's public functionality here, if you have any.
}
/**
Some code here
**/
public function FullNewsInc($db){
$this->db = &$db;
}
/**
More code here
**/
}
类名和方法名匹配，因此您需要更改PHP类以使用您编写的__construct方法，但是当前为空。
class FullNewsInc {
public function __construct( $db )
{
// Constructor's public functionality here, if you have any.
$this->db = &$db;
}
/**
Some code here
**/
//The FullNewsInc method has been deleted. The code contained within was moved to the __construct
/**
More code here
**/
}