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How to resize images

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How to resize images

Apr 21st, 2009

Can any one help me how to resize images in php with out changing its original quality,that is if an image with size 100/100 when it reduced to 40/30 or any our required dimensions with out changing its quality .

Nathenastle

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BzzBee

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Re: How to resize images

Apr 21st, 2009

this could help you

http://www.sitepoint.com/article/image-resizing-php/

BzzBee

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Re: How to resize images

Apr 21st, 2009

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Originally Posted by nathenastle

Can any one help me how to resize images in php with out changing its original quality,that is if an image with size 100/100 when it reduced to 40/30 or any our required dimensions with out changing its quality .

Please check blow Pices of Code

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
$tmpFName =	$_FILES["UploadFloorPlane"]["tmp_name"];
$fType	 =	$_FILES["UploadFloorPlane"]["type"];
$fSize	 =	$_FILES["UploadFloorPlane"]["size"];
list($width, $height, $type, $attr) = getimagesize($tmpFName);
if($width > 0) {
$fType = image_type_to_mime_type($type);
$img_valid = "true";
} else 
$img_valid = "false";
 
if($img_valid == "true"){
if(($fType == 'image/jpeg') || ($fType == 'image/pjpeg')){
$pExt = ".jpg";
} 
elseif($fType == 'image/gif'){
$pExt=".gif";
} 
elseif($fType == 'image/png'){
$pExt=".png";
} 
else{ 
$result = -2;
}
$rand=rand(0,10000);
$Enlarge = "ImageName";
$thumb   = "ImageName_thumb";
$origImage = $Enlarge ;
copy($tmpFName,$origImage.$pExt);
chmod ($origImage.$pExt, 0755);  // octal; correct value of mode
$NormalThumbImgName = $Enlarge.$pExt;
$SmallThumbImgName = $thumb.$pExt;
$DestPath = getcwd();
$objThumbnail = new ThumbNail();
$objThumbnail->CreateThumb($SmallThumbImgName,$DestPath.$origImage.$pExt,$DestPath,40,30,false,false);
$tmpFName =	$_FILES["UploadFloorPlane"]["tmp_name"];
$fType	 =	$_FILES["UploadFloorPlane"]["type"];
$fSize	 =	$_FILES["UploadFloorPlane"]["size"];
list($width, $height, $type, $attr) = getimagesize($tmpFName);
if($width > 0) {
$fType = image_type_to_mime_type($type);
$img_valid = "true";
} else 
$img_valid = "false";

if($img_valid == "true"){
if(($fType == 'image/jpeg') || ($fType == 'image/pjpeg')){
$pExt = ".jpg";
} 
elseif($fType == 'image/gif'){
$pExt=".gif";
} 
elseif($fType == 'image/png'){
$pExt=".png";
} 
else{ 
$result = -2;
}
$rand=rand(0,10000);
$Enlarge = "ImageName";
$thumb   = "ImageName_thumb";
$origImage = $Enlarge ;
copy($tmpFName,$origImage.$pExt);
chmod ($origImage.$pExt, 0755);  // octal; correct value of mode
$NormalThumbImgName = $Enlarge.$pExt;
$SmallThumbImgName = $thumb.$pExt;
$DestPath = getcwd();
$objThumbnail = new ThumbNail();
$objThumbnail->CreateThumb($SmallThumbImgName,$DestPath.$origImage.$pExt,$DestPath,40,30,false,false);

Download the below Url Class files
http://www.phpclasses.org/browse/file/4883.html

BaburajSns
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Last edited by Ezzaral; Apr 21st, 2009 at 1:13 pm. Reason: Added [code] [/code] tags. Please use them to format any code that you post.

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Re: How to resize images

Apr 21st, 2009

One more point...
By using our php codes..
Changing from 100X100 image to 40X50 image will result into same quality image...But vice versa will give corrupted image..

So make it note when your are going develop in your projects..

Be intelligent, But Don't try to cheat.. Be innocent But Don't get cheated..

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Join Date: Mar 2009

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nathenastle nathenastle is offline

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Apr 21st, 2009

Thanks for your replay but where is the code iasked can you please tell me

Nathenastle

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Re: How to resize images

Apr 21st, 2009

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
$tmpFName = $_FILES["UploadFloorPlane"]["tmp_name"];
$fType = $_FILES["UploadFloorPlane"]["type"];
$fSize = $_FILES["UploadFloorPlane"]["size"];
list($width, $height, $type, $attr) = getimagesize($tmpFName);
if($width > 0) {
$fType = image_type_to_mime_type($type);
$img_valid = "true";
} else 
$img_valid = "false";
 
if($img_valid == "true"){
if(($fType == 'image/jpeg') || ($fType == 'image/pjpeg')){
$pExt = ".jpg";
} 
elseif($fType == 'image/gif'){
$pExt=".gif";
} 
elseif($fType == 'image/png'){
$pExt=".png";
} 
else{ 
$result = -2;
}
$rand=rand(0,10000);
$Enlarge = "ImageName";
$thumb = "ImageName_thumb";
$origImage = $Enlarge ;
copy($tmpFName,$origImage.$pExt);
chmod ($origImage.$pExt, 0755); // octal; correct value of mode
$NormalThumbImgName = $Enlarge.$pExt;
$SmallThumbImgName = $thumb.$pExt;
$DestPath = getcwd();
$objThumbnail = new ThumbNail();
$objThumbnail->CreateThumb($SmallThumbImgName,$DestPath.$origImage.$pExt,$DestPath,40,30,false,false);
$tmpFName = $_FILES["UploadFloorPlane"]["tmp_name"];
$fType = $_FILES["UploadFloorPlane"]["type"];
$fSize = $_FILES["UploadFloorPlane"]["size"];
list($width, $height, $type, $attr) = getimagesize($tmpFName);
if($width > 0) {
$fType = image_type_to_mime_type($type);
$img_valid = "true";
} else 
$img_valid = "false";

if($img_valid == "true"){
if(($fType == 'image/jpeg') || ($fType == 'image/pjpeg')){
$pExt = ".jpg";
} 
elseif($fType == 'image/gif'){
$pExt=".gif";
} 
elseif($fType == 'image/png'){
$pExt=".png";
} 
else{ 
$result = -2;
}
$rand=rand(0,10000);
$Enlarge = "ImageName";
$thumb = "ImageName_thumb";
$origImage = $Enlarge ;
copy($tmpFName,$origImage.$pExt);
chmod ($origImage.$pExt, 0755); // octal; correct value of mode
$NormalThumbImgName = $Enlarge.$pExt;
$SmallThumbImgName = $thumb.$pExt;
$DestPath = getcwd();
$objThumbnail = new ThumbNail();
$objThumbnail->CreateThumb($SmallThumbImgName,$DestPath.$origImage.$pExt,$DestPath,40,30,false,false);

Download the CreateThumb Class files function
http://www.daniweb.com/forums/post85...tml#post850887

Last edited by Ezzaral; Apr 21st, 2009 at 1:15 pm. Reason: Added [code] [/code] tags. Please use them to format any code that you post.

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cwarn23

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Re: How to resize images

Apr 22nd, 2009

Hi, I have made a function that will resize images and is as follows:

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
function resize_image($filename,$newwidth,$newheight) {
    if (!file_exists($filename) || !in_array(preg_replace('/(.*)[.]([^.]+)/is','$2',basename($filename)),array('png','jpg','jpeg','gif','xbm','xpm','wbmp'))) {
        //note .wbmp is 'wireless bitmap' and not 'windows bitmap'.
        return false;
        } else {
        $ext=preg_replace('/(.*)[.]([^.]+)/is','$2',basename($filename));
        if ($ext=='jpg') { $ext='jpeg'; }
        $ext='imagecreatefrom'.$ext;
        list($width, $height) = getimagesize($filename);
        $thumb = imagecreatetruecolor($newwidth, $newheight);
        $source = $ext($filename);
        imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
        return $thumb;
        }
    }
$img = resize_image('file_from.gif','320','280');
//save image to file
imagejpeg ($img,'file.gif',100);
?>
<?php
function resize_image($filename,$newwidth,$newheight) {
    if (!file_exists($filename) || !in_array(preg_replace('/(.*)[.]([^.]+)/is','$2',basename($filename)),array('png','jpg','jpeg','gif','xbm','xpm','wbmp'))) {
        //note .wbmp is 'wireless bitmap' and not 'windows bitmap'.
        return false;
        } else {
        $ext=preg_replace('/(.*)[.]([^.]+)/is','$2',basename($filename));
        if ($ext=='jpg') { $ext='jpeg'; }
        $ext='imagecreatefrom'.$ext;
        list($width, $height) = getimagesize($filename);
        $thumb = imagecreatetruecolor($newwidth, $newheight);
        $source = $ext($filename);
        imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
        return $thumb;
        }
    }
$img = resize_image('file_from.gif','320','280');
//save image to file
imagejpeg ($img,'file.gif',100);
?>

Hope that helps ya as I would imagine that some of the previous posts would be a little confusing without the syntax highlighter.

Try not to bump 10 year old threads as it can be really annoying.
Like php then read my website at http://syntax.cwarn23.net/
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adnan3250

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Re: How to resize images

Jun 5th, 2009

I do not understand why we (the programmers) use unnecessary huge buggy codes of our own for resizing images??!! As we've phpThumb, custom image resizing functions are just a history. Then why do we manually write those codes again and make our script buggy!

Yes I know what I am saying. I was using my own codes for image resizing and one day I got problem with corrupted images and got no solution. Then I used phpThumb and the problem is fixed..

Last edited by Ezzaral; Jun 5th, 2009 at 6:32 pm. Reason: Snipped blog plug. Keep it on site please.

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Re: How to resize images

Jun 5th, 2009

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Originally Posted by adnan3250

I do not understand why we (the programmers) use unnecessary huge buggy codes of our own for resizing images??!! As we've phpThumb, custom image resizing functions are just a history. Then why do we manually write those codes again and make our script buggy!

Yes I know what I am saying. I was using my own codes for image resizing and one day I got problem with corrupted images and got no solution. Then I used phpThumb and the problem is fixed..

To know more details please visit this [URL snipped]

Because that's how programmers work. phpThumb didn't magically appear, there was some dumb guy/gal saying "Well I don't like that library, I'm going to write my own and name it phpThumb." It just so happens other people started using it. So, of course, there are still programmers that say "Well, I don't like that library I'm going to write my own."

Most of the time it's because in programmers' heads their code rocks and everyone else's sucks.

Last edited by Ezzaral; Jun 5th, 2009 at 6:34 pm. Reason: Snipped blog url from quoted text.

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