Thumbnail class for creating thumbs from uploaded images

[dosberg]

Anyone know how I can add a crop function to Ciprian Voicu's Pictoru's Thumb class.  The code is below.  I would like to output an image that is cropped from the center of the image with equal height/width (a perfect square).  Thanks!

Script source: http://www.phpclasses.org/browse/package/3296.html

[code]
<?php
# CLASS FILE
/********************************************************************************
*    Name:            Pictoru's Thumb                                                *
*    Author:            Ciprian Voicu                                                *
*    Version:         1.0                                                         *
*    Date:            2006-08-08                                                    *
*    Description:    • creates, saves, outputs thumbs                            *
*    License:         GNU GPL                                                        *
********************************************************************************/

class pThumb {

    var $image;
    var $mime;
    var $imageName;

    var $maxHeight=150;
    var $maxWidth=200;
    var $quality=75;
   
    var $rotMode="CW";
    var $rotColor="FFCC00";

    # sets thumb max width
    function pSetWidth($val){
        $this->maxWidth=$val;
    }
   
    # sets thumb max height
    function pSetHeight($val){
        $this->maxHeight=$val;
    }
   
    # set thumb both width and height
    function pSetSize($width, $height){
        $this->maxWidth=$width;
        $this->maxHeight=$height;
    }
   
    # set output quality
    function pSetQuality($number){
        $this->quality=$number;
    }

    # destroy the resource
    function pDestroy(){
        imagedestroy($this->image);
    }
   
    # rotate the image
    function pRotate($degrees, $mode=NULL, $bgcolor=NULL){
        if($mode!=NULL) $this->rotMode=strtoupper($mode);
        if($bgcolor!=NULL) $this->rotColor=$bgcolor;
       
        $bg=base_convert($this->rotColor, 16, 10);
        $img=$this->image;
        switch($this->rotMode){
            case "CW":
            case 1:
                $rotation=360-$degrees;
                break;
            case "CCW":
            case 2:
                $rotation=$degrees;
                break;
        }
       
        $img=imagerotate($this->image, $rotation, $bg);
        $this->image=$img;
    }
   
    # resize an image
    function pResize($img, $width, $height){
        $img_sizes=getimagesize($img);
        switch($img_sizes[2]){
            case 1:
                $source=imagecreatefromgif($img);
                $this->mime="GIF";
                break;
            case 2:
                $source=imagecreatefromjpeg($img);
                $this->mime="JPG";
                break;
            case 3:
                $source=imagecreatefrompng($img);
                $this->mime="PNG";
                break;
        }
        $thumb=imagecreatetruecolor($width, $height);
        imagecopyresized($thumb, $source, 0, 0, 0, 0, $width, $height, $img_sizes[0], $img_sizes[1]);
       
        $this->image=$thumb;
    }
   
    # create a thumb
    function pCreate($img, $maxwidth=NULL, $maxheight=NULL, $quality=NULL){
        if($maxwidth!=NULL) $this->maxWidth=$maxwidth;
        if($maxheight!=NULL) $this->maxHeight=$maxheight;
        if($quality!=NULL) $this->quality=$quality;

        if(file_exists($img)){           
            $this->imageName=basename($img);
            $img_sizes    =    getimagesize($img);
   
            if($img_sizes[0] > $this->maxWidth || $img_sizes[1] > $this->maxHeight){
                $percent_width = $this->maxWidth / $img_sizes[0];
                $percent_height = $this->maxHeight / $img_sizes[1];
                $percent=min($percent_width, $percent_height);
            }else{
                $percent=1;
            }
           
            $width=$img_sizes[0]*$percent;
            $height=$img_sizes[1]*$percent;
           
            $this->pResize($img, $width, $height);
        }else{
            $this->image=imagecreate($this->maxWidth, $this->maxHeight);
           
            $line=$this->pDecColors("FF0000");
            $fill=$this->pDecColors("EFE6C2");
           
            $fillcolor = imagecolorallocate($this->image, $fill['r'], $fill['b'], $fill['g']);
            $linecolor     = imagecolorallocate($this->image, $line['r'], $line['b'], $line['g']);
           
            imagefill($this->image, 0, 0, $fillcolor);
            imagerectangle($this->image, 0, 0, ($this->maxWidth-1), ($this->maxHeight-1), $linecolor);
            imageline($this->image, 0, 0, $this->maxWidth, $this->maxHeight, $linecolor);
            imageline($this->image, 0, $this->maxHeight, $this->maxWidth, 0, $linecolor);
        }
    }
   
    # function taken from "http://ro2.php.net/manual/en/function.mkdir.php"
    function MakeDirectory($dir, $mode = 0777){
      if (is_dir($dir) || @mkdir($dir,$mode)) return TRUE;
      if (!$this->MakeDirectory(dirname($dir),$mode)) return FALSE;
      return @mkdir($dir,$mode);
    }
   
    # output the image
    function pOutput($print=true){
        if($print!=true){
            header('Content-type: application/force-download');
            header('Content-Transfer-Encoding: Binary');
            header('Content-Disposition: attachment; filename="'.$this->imageName.'"');
        }
        switch($this->mime){
            case "JPEG":
            case "JPG":
                header("Content-Type: image/jpeg");
                imagejpeg($this->image, NULL, $this->quality);
                break;
            case "GIF":
                header("Content-Type: image/gif");
                imagegif($this->image);
                break;
            case "PNG":
                header("Content-Type: image/png");
                imagepng($this->image);
                break;
            default :
                header("Content-Type: image/gif");
                imagegif($this->image);
        }
        $this->pDestroy();
    }

    # save image
    function pSave($path){
        if(!file_exists(dirname($path))){
            $this->MakeDirectory(dirname($path));
        }
        switch($this->mime){
            case "JPEG":
            case "JPG":
                imagejpeg($this->image, $path, $this->quality);
                break;
            case "GIF":
                imagegif($this->image, $path);
                break;
            case "PNG":
                imagepng($this->image, $path);
                break;
        }
    }
   
    function pDecColors($color){
        $color    =    str_replace("#", "", $color);
        $colors['r']    =    hexdec(substr($color, 0, 2));
        $colors['b']    =    hexdec(substr($color, 2, 2));
        $colors['g']=    hexdec(substr($color, 4, 2));
        return $colors;
    }
   
}
?>
[/code]

[cheezylu]

I would like to know how to do this too!

[cheezylu]

This may help.

Here is a modified code from lixlpixel of PHP Paradise.  This will create a cropped thumbnail of a JPEG and upload them both into a specified directory.

[code]<?php

if(isset($_POST['Submit']))

{
$size = 100; // the thumbnail height

$filedir = 'pics/'; // the directory for the original image
$thumbdir = 'pics/'; // the directory for the thumbnail image
$prefix = 'THUM_'; // the prefix to be added to the original name

$maxfile = '2000000';
$mode = '0666';

$userfile_name = $_FILES['image']['name'];
$userfile_tmp = $_FILES['image']['tmp_name'];
$userfile_size = $_FILES['image']['size'];
$userfile_type = $_FILES['image']['type'];

if (isset($_FILES['image']['name']))
{
$prod_img = $filedir.$userfile_name;

$prod_img_thumb = $thumbdir.$prefix.$userfile_name;
move_uploaded_file($userfile_tmp, $prod_img);
chmod ($prod_img, octdec($mode));

$sizes = getimagesize($prod_img);

$aspect_ratio_wide = $sizes[1]/$sizes[0];
$aspect_ratio_tall = $sizes[0]/$sizes[1];

if ($sizes[1] > $sizes[0]) // if height is greater than width
{

if ($sizes[0] <= $size) // if width <= defined size
{
$new_width = $sizes[0];
$new_height = $sizes[1];
}else{
$new_width = $size;
$new_height = abs($new_width/$aspect_ratio_tall); }

$size_difference_height = $sizes[1] / $new_height;
$center_width = 0;
$center_height = (($new_height - $size) / 2) * $size_difference_height;

} else if ($sizes[0] > $sizes[1]) { // else if width is greater than height

if ($sizes[1] <= $size)
{
$new_width = $sizes[0];
$new_height = $sizes[1];
}else{
$new_height = $size;
$new_width = abs($new_height/$aspect_ratio_wide);
}

$size_difference_width = $sizes[0] / $new_width;
$center_width = (($new_width - $size) / 2) * $size_difference_width;
$center_height = 0;

}


$destimg = imagecreatetruecolor($size,$size)
or die('Problem In Creating image');
$srcimg = imagecreatefromjpeg($prod_img)
or die('Problem In opening Source Image');

imagecopyresampled($destimg,$srcimg,0,0,$center_width,$center_height,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg))
or die('Problem In resizing');

ImageJPEG($destimg,$prod_img_thumb,90)
or die('Problem In saving');
imagedestroy($destimg);
}

echo '
<a href="'.$prod_img.'">
<img src="'.$prod_img_thumb.'" width="$size" height="$size">
</a>
';


}else{

echo '
<form method="POST" action="'.$_SERVER['PHP_SELF'].'" enctype="multipart/form-data">
<input type="file" name="image"><p>
<input type="Submit" name="Submit" value="Submit">
</form>';
}

?>[/code]