Question

再一次，我在这里遇到一个我无法解决的简单问题，因为我使用的搜索词显然与之前使用的搜索词不匹配。我想要创建的只是一小块脚本，可以使用URL更改图像宽度。

可以在http://waarneming.nl/fotonew/0/2639780.jpg找到一个例子。如果添加变量?w=100&h=100，则会调整图像大小。值得一提的是，我不需要裁剪（在示例中也不会发生这种情况，即使100x100当然不是正确的比例）。唯一要发生的事情是CSS和HTML也可以做到：改变更大图片的高度和宽度。但是因为我需要在另一个脚本中调整大小的图像，所以我想使用URL变量。

希望你能帮忙！

Answer 1

使用SimpleImage库：

<?php

/*
* File: SimpleImage.php
* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 08/11/06
* Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details:
* http://www.gnu.org/licenses/gpl.html
*
*/

class SimpleImage {

   var $image;
   var $image_type;

   function load($filename) {

      $image_info = getimagesize($filename);
      $this->image_type = $image_info[2];
      if( $this->image_type == IMAGETYPE_JPEG ) {

         $this->image = imagecreatefromjpeg($filename);
      } elseif( $this->image_type == IMAGETYPE_GIF ) {

         $this->image = imagecreatefromgif($filename);
      } elseif( $this->image_type == IMAGETYPE_PNG ) {

         $this->image = imagecreatefrompng($filename);
      }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {

      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image,$filename,$compression);
      } elseif( $image_type == IMAGETYPE_GIF ) {

         imagegif($this->image,$filename);
      } elseif( $image_type == IMAGETYPE_PNG ) {

         imagepng($this->image,$filename);
      }
      if( $permissions != null) {

         chmod($filename,$permissions);
      }
   }
   function output($image_type=IMAGETYPE_JPEG) {

      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image);
      } elseif( $image_type == IMAGETYPE_GIF ) {

         imagegif($this->image);
      } elseif( $image_type == IMAGETYPE_PNG ) {

         imagepng($this->image);
      }
   }
   function getWidth() {

      return imagesx($this->image);
   }
   function getHeight() {

      return imagesy($this->image);
   }
   function resizeToHeight($height) {

      $ratio = $height / $this->getHeight();
      $width = $this->getWidth() * $ratio;
      $this->resize($width,$height);
   }

   function resizeToWidth($width) {
      $ratio = $width / $this->getWidth();
      $height = $this->getheight() * $ratio;
      $this->resize($width,$height);
   }

   function scale($scale) {
      $width = $this->getWidth() * $scale/100;
      $height = $this->getheight() * $scale/100;
      $this->resize($width,$height);
   }

   function resize($width,$height) {
      $new_image = imagecreatetruecolor($width, $height);
      imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
      $this->image = $new_image;
   }      

}
?>

然后，试试这个：

<?php
   include('SimpleImage.php');
   $image = new SimpleImage();
   $image->load($_GET['file']);
   $image->resize($_GET['width'], $_GET['height']);
   $image->output();
?>

为了调用脚本，您可以通过URL传递文件名，宽度和高度。假设该脚本名为foo.php：

http://www.example.com/foo.php?file=picture_name.jpg&width=100&height=100

Answer 2

您可以在javascript中获取params并将其指定给图像。类似的东西：

 function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}

然后：

var imagelengh = gup('w')
$('#image').width(w)

Answer 3

以下是一些可能有用的链接：

developphp

net.tutsplus.com: image resizing made easy with php

code-sucks.com: use php to resize an image

Dbscripts: php resize image

Google Search

通过URL更改图像大小

3 个答案: