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Posted By

kumar_sekhar on 04/14/11


Tagged

resize image


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Some0ne
mikael12
StarkCreations


Image Resize

 / Published in: PHP
 

Purpose: This script can be used to resize one or more images. It will save the file to a directory and output the path to that directory which you can display or write to a databse. 

TO USE,  SET: 
    $filename = image to be resized
    $newfilename = added to filename to for each use to keep from overwriting images created example thumbnail_$filename is how it will be saved.
    $path = where the image should be stored and accessed. 
    $newwidth = resized width could be larger or smaller
    $newheight = resized height could be larger or smaller

SAMPLE OF FUNCTION: makeimage('image.jpg', 'fullimage_', 'imgs/', 250, 250)

Include the file containing the function in your document and simply call the function with the correct parameters and your image will be resized.
Expand | Embed | Plain Text 
  1. //IMAGE RESIZE FUNCTION FOLLOW ABOVE DIRECTIONS
  2. function makeimage($filename, $newfilename, $path, $newwidth, $newheight) {
  3.  
  4.     //SEARCHES IMAGE NAME STRING TO SELECT EXTENSION (EVERYTHING AFTER . )
  5.     $image_type = strstr($filename,  '.');
  6.  
  7.     //SWITCHES THE IMAGE CREATE FUNCTION BASED ON FILE EXTENSION
  8.         switch($image_type) {
  9.             case '.jpg':
  10.                 $source = imagecreatefromjpeg($filename);
  11.                 break;
  12.             case '.png':
  13.                 $source = imagecreatefrompng($filename);
  14.                 break;
  15.             case '.gif':
  16.                 $source = imagecreatefromgif($filename);
  17.                 break;
  18.             default:
  19.                 echo("Error Invalid Image Type");
  20.                 die;
  21.                 break;
  22.             }
  23.  
  24.     //CREATES THE NAME OF THE SAVED FILE
  25.     $file = $newfilename . $filename;
  26.  
  27.     //CREATES THE PATH TO THE SAVED FILE
  28.     $fullpath = $path . $file;
  29.  
  30.     //FINDS SIZE OF THE OLD FILE
  31.     list($width,  $height) = getimagesize($filename);
  32.  
  33.     //CREATES IMAGE WITH NEW SIZES
  34.     $thumb = imagecreatetruecolor($newwidth,  $newheight);
  35.  
  36.     //RESIZES OLD IMAGE TO NEW SIZES
  37.     imagecopyresized($thumb,  $source,  0,  0,  0,  0,  $newwidth,  $newheight,  $width,  $height);
  38.  
  39.     //SAVES IMAGE AND SETS QUALITY || NUMERICAL VALUE = QUALITY ON SCALE OF 1-100
  40.     imagejpeg($thumb,  $fullpath,  60);
  41.  
  42.     //CREATING FILENAME TO WRITE TO DATABSE
  43.     $filepath = $fullpath;
  44.  
  45.     //RETURNS FULL FILEPATH OF IMAGE ENDS FUNCTION
  46.     return $filepath;
  47.  
  48. }

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