通过PHP上传图片，将图片路径保存到MySQL

Question

确定这对您的专家来说很简单，我试图将图片上传到网站并将路径保存到数据库。如果可能，如何在保存前更改图像大小？

这里是我的脚本处理更新时更新查询：

<?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的图像下面的代码：

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

谢谢！

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有GD库处理图像：功能imagecopyresampled调整图像大小。验证GD是否在你身上php配置 http://us3.php.net/imagecopyresampled