严格标准:仅变量应通过引用 PHP 5.4 分配

2022-01-05 00:00:00 reference php porting

我将 PHP 版本升级到 5.4(XAMPP 1.7.3 到 1.8.0).现在我看到 Strict Standards 错误，对于 myDBconnection:

I upgraded my PHP version to 5.4 (XAMPP 1.7.3 to 1.8.0). Now I see Strict Standards error, for myDBconnection:

严格标准:C:xampphtdocsalousincludedbconn.php 第 4 行中的变量只能通过引用赋值

Strict Standards: Only variables should be assigned by reference in C:xampphtdocsalousincludedbconn.php on line 4

dbconn.php:

<?php
    defined('_VALID') or die('Restricted Access!');

    $conn = &ADONewConnection($config['db_type']); // <--- This Line 4

    if ( !$conn->Connect($config['db_host'],
                         $config['db_user'],
                         $config['db_pass'],
                         $config['db_name'])) {

        echo 'Could not connect to MySQL! Please check your database settings!';
        die();
    }
    $conn->execute("SET NAMES 'utf8'");
?>

注意:我不需要使用此方法在 php.ini 中禁用 Strict Standards error_reporting = E_ALL &~E_NOTICE &~E_STRICT！我想修复我的 PHP 代码.

Note: I don't need to disable Strict Standards in php.ini with this method error_reporting = E_ALL & ~E_NOTICE & ~E_STRICT! I want to fix my PHP code.

推荐答案

您应该删除 &(与号)符号，以便第 4 行看起来像这样:

You should remove the & (ampersand) symbol, so that line 4 will look like this:

$conn = ADONewConnection($config['db_type']);

这是因为 ADONewConnection 已经通过引用返回了一个对象.根据文档，通过引用将引用的结果分配给对象从 PHP 5.3.0 开始，会产生 E_DEPRECATED 消息

This is because ADONewConnection already returns an object by reference. As per documentation, assigning the result of a reference to object by reference results in an E_DEPRECATED message as of PHP 5.3.0

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