how to operate images

[Nari_solution]

i want to enlarge the images with no reducing clarity,,, and how to minimise the size(kb) of an image... also with quality..

pls help ..
Nari

[mahavir123]

You can't enlarge the same image by retaining the clarity.
You have to store a different large image for enlarge image.
You can save different KBs of same image and use whenever you want.

function upload_image($name, $tname, $size, $path, $wth, $hth)
parameters are : as follows
$name - name of the uploaded image file
$tname - tem_name of the uploaded image file
$size - bite size of the imagefile
$path - where do you want to save the image
$wth - to width you want to resize
$hth - to height you want to resize

You may not need the 'getBaseName($image_name)' function, but it was in my function set.
Try to implement the code. Good luck with this.

<?php
function resizeimage($tname, $ext, $to_wth, $to_hth)
{
	list($width,$height) = getimagesize($tname);
	$wratio = $to_wth/$width;
	$hratio = $to_hth/$height;
	$ratio=($hratio < $wratio) ? $hratio : $wratio;
	$new_width=round($width*$ratio);
	$new_height=round($height*$ratio);
	$imageResized = imagecreatetruecolor($to_wth, $to_hth);
	$bg=imagecolorallocate ( $imageResized, 255, 255, 255 );
	imagefill ( $imageResized, 0, 0, $bg );
	switch($ext) {
            case 'jpg':
                $imageTmp = imagecreatefromjpeg($tname);
                break;
			case 'jpeg':
                $imageTmp = imagecreatefromjpeg($tname);
                break;
            case 'png':
                $imageTmp = imagecreatefrompng($tname);
                break;
            case 'gif':
                $imageTmp = imagecreatefromgif($tname);
                break;
            default:
                echo("Error Invalid Image Type");
                die;
                break;
            }
	$x_mid = $new_width/2;
    $y_mid = $new_height/2;
	//imagecopyresized($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
	imagecopyresampled($imageResized, $imageTmp, (($to_wth-$new_width)/2), (($to_hth-$new_height)/2), 0, 0, $new_width, $new_height, $width, $height);
    return $imageResized;
}
function upload_image($name, $tname, $size, $path, $wth, $hth)
{
	$oext=getExtention($name);
	$ext=strtolower($oext);
	$base_name=getBaseName($name);
	if($ext=="jpg" || $ext=="jpeg" || $ext=="png" || $ext=="gif")
	{
		if($size< 1024*1024*10)
		{
			$tname = resizeimage($tname, $ext, $wth, $hth);
			if(!file_exists($path."".$name))
			{
				imagejpeg($tname,$path."".$name);
				//move_uploaded_file($tname,$path."".$name);
				return 1;
			}
			return 0;
		}
		else
		{
			echo "Image size excedded.<br />File size should be less than 10Mb<br />";
			return 0;
		}
	}
	else
	{
		echo "Invalid file extention '.$oext'<br />";
		return 0;
	}
	return 0;
}
function getExtention($image_name){
	return substr($image_name,strrpos($image_name,'.')+1);
}
function getBaseName($image_name){
	return substr($image_name,0,strrpos($image_name,'.'));
}
?>