Codeigniter image thumbnail example

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10 years ago

Codeigniter image thumbnail example

Codeigniter image thumbnail library | codeigniter image thumbnail example | codeigniter image thumbnail function | codeigniter create image thumbnail
Create custom image thumbnail library in codeigniter .
1 . Go to application/library
2 . Create Thumb.php file
3 . Add the following code in Thumb.php

<?php
if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Thumb{
  public  function createThumbs($pathToImages,$fname, $pathToThumbs, $thumbWidth ,$thumbHeight) 
{
  $srcFile = $pathToImages.$fname;
  $thumbFile = $pathToThumbs.$fname;
  if(!empty($fname))
  {
  $type = strtolower(substr( $fname , strrpos( $fname , '.' )+1 ));

 $thumbnail_width=$thumbWidth;
 $thumbnail_height=$thumbHeight;
 
  switch( $type ){
    case 'jpg' : case 'jpeg' :
         try{
           $src = imagecreatefromjpeg( $srcFile ); break;
       } 
       catch(Exception $e) {
          
           log_message('System Error', $e->getMessage());
       }
      ///$src = imagecreatefromjpeg( $srcFile ); break;
  case 'jpeg' : case 'jpeg' :
       try{
           $src = imagecreatefromjpeg( $srcFile ); break;
       } 
       catch(Exception $e) {
          
           log_message('System Error', $e->getMessage());
       }
    case 'png' :
        if ( ! function_exists('imagecreatefrompng'))
        {
            $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));
            return FALSE;
        }
      $src = imagecreatefrompng( $srcFile ); break;
    case 'gif' :
         if ( ! function_exists('imagecreatefromgif'))
        {
            $this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));
            return FALSE;
        }
      $src = imagecreatefromgif( $srcFile ); break;
  }
     list($width_orig, $height_orig) = getimagesize($srcFile); 
     $ratio_orig = $width_orig/$height_orig;
    
    if ($thumbnail_width/$thumbnail_height > $ratio_orig) {
       $new_height = $thumbnail_width/$ratio_orig;
       $new_width = $thumbnail_width;
    } else {
       $new_width = $thumbnail_height*$ratio_orig;
       $new_height = $thumbnail_height;
    }
    
    $x_mid = $new_width/2;  //horizontal middle
    $y_mid = $new_height/2; //vertical middle
    
    $process = imagecreatetruecolor(round($new_width), round($new_height)); 
    
    imagecopyresampled($process, $src, 0, 0, 0, 0, $new_width, $new_height, $width_orig, $height_orig);
    $dest_img = imagecreatetruecolor($thumbnail_width, $thumbnail_height); 
    imagecopyresampled($dest_img, $process, 0, 0, ($x_mid-($thumbnail_width/2)), ($y_mid-($thumbnail_height/2)), $thumbnail_width, $thu    mbnail_height, $thumbnail_width, $thumbnail_height);

    switch( $type ){
    case 'jpg' : case 'jpeg' :
      $src = imagejpeg( $dest_img , $thumbFile ); break;
    case 'png' :
      $src = imagepng( $dest_img , $thumbFile ); break;
    case 'gif' :
      $src = imagegif( $dest_img , $thumbFile ); break;
  }
  
  }    
    
}


 
}
?>

How to Use :
1 . Load Library & call methiod createThumbs()

You can make thumbs to those images which has been upploaded in folder ‘images’.
You can call this library just after your image upload is completed.

example :
suppose we have to make thumb which is uploaded in folder ‘images’ named as ‘test.jpg’
$this->load->library(‘Thumb’);

$pathToImages=’images/’;
$pathToThumbs = ‘images/thumbs/’;
$imagename = ‘test.jpg’;
$thumbWidth =’100′;
$thumbHeight = ‘100’;
$this->Thumb->createThumbs($pathToImages,$imagename, $pathToThumbs, $thumbWidth ,$thumbHeight);