Question

对于您的专家来说，这是一个简单的方法，我试图将图像上传到网站并保存到数据库的路径。如果可能，如何在保存前更改图像尺寸？

这是我的脚本，用于在更新时处理更新查询：

<?php   // Get Event ID
    $update=$_GET['update'];

    // Create Session
    $event_name=$_POST['event_name'];
    $event_description=$_POST['event_description'];
    $event_date=$_POST['event_date'];
    $event_time=$_POST['event_time'];
    $event_cost=$_POST['event_cost'];
    $event_image=$_POST['event_image'];

    // Connection to MySQL Database.
    include ('_includes/_dbconnection.php');
    include ('_includes/_dbopen.php');

    // Update Event using Event ID.

    $sql="UPDATE b_events SET ename = '$event_name', edescription = '$event_description', edate = '$event_date', etime = '$event_time', ecost = '$event_cost', eimage = '$event_image' WHERE id = '$update'";
    $result=mysql_query($sql);

    if($result){
    header('Location: _events.php');
    }

    else {
    header('Location: _home.php');
    }

?>

我在update.html中为图片提供了以下代码：

<input name="event_image" type="file" />

感谢!!!

Answer 1

要更改图像大小，必须调整大小。用于创建具有特定尺寸的副本的功能。

<?php
// File and new size
$filename = 'test.jpg';
$percent = 0.5;

// Content type
header('Content-Type: image/jpeg');

// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = $width * $percent;
$newheight = $height * $percent;

// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);
$source = imagecreatefromjpeg($filename);

// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

// Output
imagejpeg($thumb);
?>

来源：http://php.net/manual/en/function.imagecopyresized.php

Answer 2

Php具有用于处理图像的GD库：function imagecopyresampled调整图像大小。验证您的php配置中是否包含GD http://us3.php.net/imagecopyresampled

通过PHP上传图像，将图像路径保存到MySQL

2 个答案: