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how can i resize image and keep the aspect ratio ?

Posted on 2009-05-12
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Last Modified: 2012-05-06
Hello here is my script used to upload an image so i need to have the size of the image to 150px
note that i am using easyphp that have php 4.0 so i look for a solution that work on it.
PS: please help by adding the resize image to my code structure listed below
function upload($file,$t,$path)
{
	$post=$_FILES[$file];
	$title=$_POST[$t];
	$rand=rand(100,10000);
	//upload setting
	//$path="../images/products/";	
	//rename
	$remove_these = array(' ','`','"','\'','\\','/');
	//Make the filename unique
	$type1=explode("/" ,$post['type']);
	
		if ( $post['size'] > 0 ) {
		
			if ( $post['type'] != "image/pjpeg" && $post['type'] != "image/gif" && $post['type'] != "image/bmp" && $post['type'] != "image/jpg"  ){
			$picture='1';
			}
			else{
				if ( $post['type'] == "image/pjpeg"){ $picture= $title."-".$rand.'.jpg'; }
				else{ $picture=$title."-".$rand.".".$type1[1];}
					
					if(move_uploaded_file($post["tmp_name"], $path.$picture ) ) { 
						chmod($path.$picture, 0777);
						$my_new_file = $path.$picture;
						} else{ $test="";  }
				}
		
 
		}
		else {
		$picture='0';
		}
return $picture;
}
 
 
//here the trick to render the message to the notification div
$print=upload("image","title","../images/sell/products/");
$script='<script type="text/javascript">';
if ( $print == "0" )
{
$script.='parent.document.getElementById("nimage").innerHTML="KINDLY CHOOSE A VALID IMAGE";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#FF4200";'. "\n"; 
}
if ( $print == "1" )
{
$script.='parent.document.getElementById("nimage").innerHTML="NOT AN IMAGE TYPE! | ONLY JPEG, GIF AND BMP IMAGE ACCEPTED";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#FF4200";'. "\n"; 
}
else
{
$script.='parent.document.getElementById("nimage").innerHTML="IMAGE SUCCESSFULLY UPLOADED";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#ABCDEC";'. "\n"; 
$_SESSION['sellimage']=$print;
 
}
$script.='</script>';
 
echo $script;

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Question by:Styleminds
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9 Comments
 
LVL 9

Accepted Solution

by:
Sander Stad earned 2000 total points
ID: 24363864
This shoud help you:

function upload($file,$t,$path){
 
	$post=$_FILES[$file];
	$title=$_POST[$t];
	$rand=rand(100,10000);
	//upload setting
	//$path="../images/products/";  
	
	//rename
	$remove_these = array(' ','`','"','\'','\\','/');
	
	//Make the filename unique
	$type1=explode("/" ,$post['type']);
 
	if( $post['size'] > 0 ) {
		if ( $post['type'] != "image/pjpeg" && $post['type'] != "image/gif" && $post['type'] != "image/bmp" && $post['type'] != "image/jpg"  ){
			$picture='1';
		} else{
			if ( $post['type'] == "image/pjpeg"){ 
				$picture= $title."-".$rand.'.jpg'; 
			}else{ $picture=$title."-".$rand.".".$type1[1];}
		
			if(move_uploaded_file($post["tmp_name"], $path.$picture ) ) { 
				chmod($path.$picture, 0777);
				$my_new_file = $path.$picture;
				
				//get height and width from image
				$dimensions = getimagesize($my_new_file); 
				$sourceWidth = $dimensions[0]; 
				$sourceHeight = $dimensions[1];
				
				// set the longest side
				$longSide = $sourceHeight
	
				// If the longest side is smaller than the width
				if(sourceHeight < $sourceWidth){
					$longSide = $oldImage.Width
				}
				
				// if the longest side is greater than the new size
				if($longSide > 150) {
					//if the height is smaller than the width
					if($sourceHeight < $sourceWidth) {
						$newH = 150
						$newW = ($sourceWidth * 150 / $sourceHeight)
					# Als de hoogte groter is dan de breedte
					} else {
						$newW = 150
						$newH = ($sourceHeight * $newW / $sourceWidth)
					}
		
					// read the image
					$image = imagecreatefromjpeg($my_new_file);
    
					// create a new image width the desired size
					$destination = imagecreatetruecolor($newW, $newH);
    
					// fill the new image with the resized image
					imagecopyresampled($destination, $image, 0, 0, 0, 0, $newW, $newH, $sourceWidth, $sourceHeight);
    
					// display the image
					imagejpeg($destination);
    
		
				} else {
					// do nothing
				}
			} else{ 
				$test="";  
			}
		}
	}else {
		$picture='0';
	}
	
	return $destination;
	
	// destroy the sourcedata
	imagedestroy($image);
 
	// destroy the destination data
	imagedestroy($destination); 
}
 
 
//here the trick to render the message to the notification div
$print=upload("image","title","../images/sell/products/");
$script='<script type="text/javascript">';
if ( $print == "0" )
{
$script.='parent.document.getElementById("nimage").innerHTML="KINDLY CHOOSE A VALID IMAGE";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#FF4200";'. "\n"; 
}
if ( $print == "1" )
{
$script.='parent.document.getElementById("nimage").innerHTML="NOT AN IMAGE TYPE! | ONLY JPEG, GIF AND BMP IMAGE ACCEPTED";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#FF4200";'. "\n"; 
}
else
{
$script.='parent.document.getElementById("nimage").innerHTML="IMAGE SUCCESSFULLY UPLOADED";'. "\n"; 
$script.='parent.document.getElementById("dimage").style.backgroundColor="#ABCDEC";'. "\n"; 
$_SESSION['sellimage']=$print;
 
}
$script.='</script>';
 
echo $script;

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Author Comment

by:Styleminds
ID: 24364976
there many miss type in this script i try to fix but however there still some question mark on this ! where these variable are not delcared anywhere in the function

                                if($sourceHeight < $sourceWidth){
                                        $longSide = $oldImage.Width;
                                }

and the function imagecreatefromjpeg() give this error
Fatal error: Call to undefined function: imagecreatefromjpeg() in i:\easyphp1-8\www\audiominds\newmodules\uploadimage.php on line 83

so please advice
0
 
LVL 9

Expert Comment

by:Sander Stad
ID: 24371904
Sorry made a little typo:

if($sourceHeight < $sourceWidth){
           $longSide = $sourceWidth;
}
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Author Comment

by:Styleminds
ID: 24372851
this function return that is undefined !
imagecreatefromjpeg($my_new_file);
how can i fix it ?
0
 
LVL 9

Expert Comment

by:Sander Stad
ID: 24373135
Assuming you're on Windows:
 Open a text editor (notepad, etc.).
 Open php.ini.
 Look for a line like this:
 ;extension=php_gd.dll
 Erase the semicolon (;).
0
 

Author Comment

by:Styleminds
ID: 24375028
there is only
extension=php_gd2.dll
and it didn't have any semocolon!
any idea ! how can i get this function to work !  i just need to remind what i advice above i am using easy php with php4 so i need a solution for this version i don't want to upgrade for the time being.
Thanks.
0
 
LVL 9

Expert Comment

by:Sander Stad
ID: 24382051
can you get the phpinfo. do you see anything like GD in there?



<?php
 
phpinfo();
 
?>

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Author Comment

by:Styleminds
ID: 24382657
sorry i get lost ! where i can find this also in php.ini? does this available in php folder as i found another one in the apashe server
please advise.
0
 
LVL 9

Expert Comment

by:Sander Stad
ID: 24382677
no create a php file and paste the above code in it.
run the file and you'll get all the modules and other information about your current php configuration.
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