PHP Image Gallery

Re: How to resize images upon upload?

Minisuit — Tue, 07 Aug 2012 07:42:40 GMT

<?php

function thumbnail($inputFileName, $maxSize = 100) {

$info = getimagesize($inputFileName);

$type = isset($info['type']) ? $info['type'] : $info[2];

if (!(imagetypes() & $type)) {

return false;

}

$width = isset($info['width']) ? $info['width'] : $info[0];

$height = isset($info['height']) ? $info['height'] : $info[1];

// Calculate aspect ratio

$wRatio = $maxSize / $width;

$hRatio = $maxSize / $height;

// Using imagecreatefromstring will automatically detect the file type

$sourceImage = imagecreatefromstring(file_get_contents($inputFileName));

// Calculate a proportional width and height no larger than the max size.

if (($width <= $maxSize) && ($height <= $maxSize)) {

// Input is smaller than thumbnail, do nothing

return $sourceImage;

} elseif (($wRatio * $height) < $maxSize) {

// Image is horizontal

$tHeight = ceil($wRatio * $height);

$tWidth = $maxSize;

} else {

// Image is vertical

$tWidth = ceil($hRatio * $width);

$tHeight = $maxSize;

}

$thumb = imagecreatetruecolor($tWidth, $tHeight);

if ($sourceImage === false) {

// Could not load image

return false;

}

// Copy resampled makes a smooth thumbnail

imagecopyresampled($thumb, $sourceImage, 0, 0, 0, 0, $tWidth, $tHeight, $width, $height);

imagedestroy($sourceImage);

return $thumb;

}

function imageToFile($im, $fileName, $quality = 80) {

if (!$im || file_exists($fileName)) {

return false;

}

$ext = strtolower(substr($fileName, strrpos($fileName, '.')));

switch ($ext) {

case '.gif':

imagegif($im, $fileName);

break;

case '.jpg':

case '.jpeg':

imagejpeg($im, $fileName, $quality);

break;

case '.png':

imagepng($im, $fileName);

break;

case '.bmp':

imagewbmp($im, $fileName);

break;

default:

return false;

}

return true;

}

We Can Also try this code to Resize the Image and upload it.

Re: How to resize images upon upload?

Kenneth — Mon, 09 Jul 2012 13:28:58 GMT

hi JBWebWorks,

Open file "phpgallery\phpuploader\ajaxuploaderhandler.php", remove all the code of it. Then use the code below in this file.

Setting "$maxwidth" and "$maxheight" are the max values which use to resize the image.

$maxwidth=600;

$maxheight=400;

<?php require_once "include_phpuploader.php" ?>

<?php

set_time_limit(3600);

$uploader=new PhpUploader();

$uploader->PreProcessRequest();

$mvcfile=$uploader->GetValidatingFile();

if($mvcfile->FileName=="thisisanotvalidfile")

{

$uploader->WriteValidationError("My custom error : Invalid file name. ");

exit(200);

}

if( $uploader->SaveDirectory )

{

if(!$uploader->AllowedFileExtensions)

{

$uploader->WriteValidationError("When using SaveDirectory property, you must specify AllowedFileExtensions for security purpose.");

exit(200);

}

$cwd=getcwd();

chdir( dirname($uploader->_SourceFileName) );

if( ! is_dir($uploader->SaveDirectory) )

{

$uploader->WriteValidationError("Invalid SaveDirectory ! not exists.");

exit(200);

}

chdir( $uploader->SaveDirectory );

$wd=getcwd();

chdir($cwd);

$targetfilepath= "$wd/" . $mvcfile->FileName;

if( file_exists ($targetfilepath) )

unlink($targetfilepath);

$mvcfile->CopyTo( $targetfilepath );

}

$img=null;

$ext=pathinfo($mvcfile->FileName,PATHINFO_EXTENSION);

switch(strtolower($ext))

{

case "png":

$img= imagecreatefrompng($mvcfile->FilePath);

break;

case "gif":

$img= imagecreatefromgif($mvcfile->FilePath);

break;

case "jpg":

case "jpeg":

default:

$img= imagecreatefromjpeg($mvcfile->FilePath);

break;

}

$width=imagesx($img);

$height=imagesy($img);

$maxwidth=600;

$maxheight=400;

if($width>$maxwidth || $height>$maxheight)

{

$ww=$width/$maxwidth;

$hh=$height/$maxheight;

$factor=max($ww,$hh);

$wnew=floor($width/$factor);

$hnew=floor($height/$factor);

$thumb=imagecreatetruecolor($wnew,$hnew);

imagecopyresized($thumb,$img,0,0,0,0,$wnew,$hnew,$width,$height);

imagedestroy($img);

imagejpeg($thumb,$mvcfile->FilePath);

imagedestroy($thumb);

}

else

{

imagedestroy($img);

}

$uploader->WriteValidationOK();

Regards,

Ken

How to resize images upon upload?

JBWebWorks — Thu, 05 Jul 2012 05:12:41 GMT

How do you set the gallery to resize images while uploading?

Using Explorer Layout and Explorer Editor

Thanks for your help,