Codeigniter image thumbnail example
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);
$
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