php

Submitted by Anonymous (not verified) on Mon, 05/31/2010 - 16:56

using this code we can resize the image by height , width and both but i want get the out put like when we use constrain proportions in photo shop because when i resize using this code the image looks like stretched or compressed is it possible to write code to get the image without stressing or compressing?

<?php
if(isset($_POST['Submit']))
{
$a=$_REQUEST['aaa'];
//error_reporting(0);
include "db.php";
$current_image=$_FILES['image']['name'];
$extension = substr(strrchr($current_image, '.'), 1);
 if ((
$extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif"))
{
header('loaction:uploads.php?a=sorry UR logo is not supported try again');
}
else
{
include
'sampleimage.php';
$current_image=$_FILES['image']['name'];
 
$image = new SimpleImage();
  
$image->load($_FILES['image']['tmp_name']);
  
//$image->resize(168,102);
  
$image->scale(50);

//$image->resizeToWidth(168);

   $image->save("logos/$current_image");
  
$conn = mysql_connect("$hostname","$username", "$password") or die("sorry");
mysql_select_db($database,$conn) or die("not connected to database");
$current_image=$_FILES['image']['name'];
$sql = "update school_tbl SET  logo = '$current_image' WHERE school_name='$a'";
//echo $sql;exit;
$a=mysql_query($sql);
if(
$a==1)
    {
   
header('location:listing_ad.php');
    }
    else
    {
echo
"sorry";
   
//header('location:uploads.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);
     
//echo $image_info[1];exit;
     
$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;  
   }     
}
?>

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