Изменение размера изображения до более высокого разрешения с помощью PHP

Question

Я хочу изменить размер изображений до фиксированного разрешения (540x540 или 640x640). размеры моего исходного изображения варьируются от 320x320 до 720x720. Может ли кто-нибудь дать решение для изменения размера этих изображений? Я использую PHP с GD

Спасибо.

Answer 1

resize.php

<?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; 
    }  

} 
?> 

Output.php

<? 
include ("rezise.php"); 
$piclocation="images/123.jpg"; 
$picsavelocation="images/123.jpg"; 

$image = new SimpleImage(); 
$image->load(''.$piclocation.''); 
$image->resize(188,282); 
$image->save(''.$piclocation.''); 


header('Content-type: image/jpeg'); 
echo file_get_contents(''.$picsavelocation.''); 
unlink($save_rand_name); 
?>