Question

如果我想将连接放在外部文件中，该代码的哪一部分应该在该外部文件中？

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "podcast";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $sql = "UPDATE bookmarks
            SET podcast=122, text='some text'
            WHERE id = 152";

    $stmt = $conn->prepare($sql);
    $stmt->execute();
    echo $stmt->rowCount() . " records UPDATED successfully";
}

catch(PDOException $e){
    echo $sql . "<br>" . $e->getMessage();
}

$conn = null;

Answer 1

此部分将包含外部文件，例如connection.php

<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "podcast";
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
?>

然后你的代码看起来像

require("connection.php");

try {

    $sql = "UPDATE bookmarks
            SET podcast=122, text='some text'
            WHERE id = 152";

    $stmt = $conn->prepare($sql);
    $stmt->execute();
    echo $stmt->rowCount() . " records UPDATED successfully";
}

catch(PDOException $e){
    echo $sql . "<br>" . $e->getMessage();
}

$conn = null;

Answer 2

$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "podcast"; 
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

}

直到此部分可以转到外部文件，并可用于在需要时打开连接。

PDO。如何将连接放在外部文件中

2 个答案: