resizing images from db

ROCKINDANO · December 10, 2009

Can someone tell me why this isn't working? i am trying to resize an image that gets uploaded to a dir. and db stores the file name under the "file" column. this is the page that displays the image :

				 		print '<img src="images/resize_image.php?file=$pic" title="" border="0" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />';

this is the page that resizes the images:

<?php 
$pic = $HTTP_GET_VARS['file'];
print $pic;
print "image ";

if (!max_width)
	$max_width = 80;
if (!max_height)
	$max_height = 60;

$size = GetpicSize($pic);
$width = $size[0];
$height = $size[1];

$x_ratio = $max_width / $width;
$y_ratio = $max_height / $height;

if ( ($width <= $max_width) && ($height <= $max_height) ) {
	$tn_width = $width;
	$tn_height = $height;
}
else if (($x_ratio * $height) < $max_height) {
	$tn_height = ceil($x_ratio * $height);
	$tn_widht = $max_width;
}
else {
	$tn_width = ceil($y_ratio * $width);
	$tn_height = $max_height;
}

$src = ImageCreateFromJpeg($pic);
$dst = ImageCreate($tn_width, $tn_height);
ImageCopyResize($dt, $src, 0,0,0,0, $tn_width, $tn_height, $width,$height);

header('Content-type: image/jpeg');
ImageJpeg($dst, null, -1);
ImageDestroy($src);
ImageDestroy($dst);

?>

Buddski · December 10, 2009

2 things I have noticed.

1.

   if (!max_width)
      $max_width = 80;
   if (!max_height)
      $max_height = 60;

should be

   if (!isset($max_width))
      $max_width = 80;
   if (!isset($max_height))
      $max_height = 60;

and secondly remove the print calls on the top section of the script.

ROCKINDANO · December 10, 2009

well that still didn't work. for some reason its not passing the image file name to the script

Buddski · December 10, 2009

Ok. without seeing the main page and where the file name is coming from I cant give any more insight but I did notice 1 other thing that I believe is your main issue..

print '<img src="images/resize_image.php?file=$pic" title="" border="0" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />';

should be

print '<img src="images/resize_image.php?file='.$pic.'" title="" border="0" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />';

You cant include variables into a string using single quotes..

premiso · December 10, 2009

$HTTP_GET_VARS has long been depreciated. Use $_GET instead. (Not that it will fix it, just a side note.)

ROCKINDANO · December 10, 2009

here is my main page

               <?php 
	if(!($db = @ mysql_connect('localhost', 'user', 'pass')))
		{
			print "Error: Could not connect to our database sorry for any inconvenience.<br /> Please try at a later time.";
		}						
		 //select which database you want to edit
		mysql_select_db("db"); 

//			$news_id=mysql_real_escape_string($_GET[news_id]);

		$query = "SELECT * FROM news ORDER BY news_id DESC LIMIT 6";
		$result = mysql_query($query);
	?>
        	<div style="background:#cfdbea; height:180px;padding: 5px; font-size: 14px">
            	<div style="background:#FFFFFF; height:160px; padding:10px;">
         <?php
	 		$i = 1; 

			while ($r=mysql_fetch_array($result))
			{
				$news_id=$r["news_id"];
				$title=$r["title"];
				$fulldesc=$r["fulldesc"];
				$pic=$r["file"];

	?>
        	
	        <div id="slide<?php print $i; ?>" class='slides'>
                <div class='slideTitle' style="padding-bottom:2px;">
                
			<?php 
					if ($pic!="") {
					print "<img src=\"images/resize_image.php?file = '.$pic.'\" border=\"1\" class=\"floatright\" title=\".$pic.\" alt=\"$pic\" />";
//				 		print '<img src="images/'.$pic.'" title="" border="0" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />'; 
}
			 		else 
			 		print '<img src="images/imageholdershow.jpg" title="" border="2" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />'; 
			 ?>
                
			<?php print "<p style='padding: 0px;'><a href='newsevents.php?news_id={$news_id}' style='color:#9F0000; text-decoration:underline'>".$title."</a>"; ?></div>
                <p><?php print substr($fulldesc = $r["fulldesc"], 0, 280); 
	          print "&#8230; <a href='newsevents.php?news_id={$news_id}' style=\"font-size: 11px\">Full Story »</a></p>"; ?>
                 </div>
                 
         <?php
	 		$i++;


			}//end while loop
	?>

Buddski · December 10, 2009

Your image tag has to be either:

print "<img src=\"images/resize_image.php?file=$pic\" border=\"1\" class=\"floatright\" title=\".$pic.\" alt=\"$pic\" />";
-- OR --
print '<img src="images/'.$pic.'" title="" border="0" width="170" height="135" class="floatright" style="margin-left: 5px; border: 2px solid #CCCCCC; padding: 3px; background: #9bbdfd;" />';

Double quotes allow you to have variables in them single quoted strings do not..

eg:

$name = 'Buddski';

echo "Hello, $name, how are you?"; //would output 'Hello, Buddski, how are you?'

echo 'Hello, $name'; // would output 'Hello, $name, how are you?'

echo 'Hello, '.$name.' how are you?'; // would output 'Hello, Buddski, how are you?'

ROCKINDANO · December 10, 2009

ok i changed it to

						print "<img src=\"images/resize_image.php?file=.$pic.\" border=\"1\" class=\"floatright\" title=\".$pic.\" alt=\"$pic\" />";

Buddski · December 10, 2009

remove the full stops on either side of the $pic variable.. so it is just plain file=$pic

ROCKINDANO · December 10, 2009

still no image. i am quessing that the re size script is not getting the file name

Buddski · December 10, 2009

view the output source code in your browser.. that will tell you the image path for the image tag..

ROCKINDANO · December 10, 2009

what do you mean?

Buddski · December 10, 2009

After you have executed your script in the browser view the source code.. the page where no image shows up..

Navigate your way through it and find the image tag.. and read it src value..

Alternativley you can right click where the image is supposed to be (depending on your browser) and view the properties of the image which will also give you its src value..

ROCKINDANO · December 10, 2009

it gets the image because it gives me the name of the file. and this is what the source code shows as the image tag path:

<img src="images/resize_image.php?file=forbeslogo.jpg" border="1" class="floatright" title="forbeslogo.jpg" alt="forbeslogo.jpg" />

and the title and alt attributes in the img tag show the name of the file. but don't know why it is not showing.

Buddski · December 10, 2009

Now we know that the issue lies within the resizing script and your main page is working correctly..

The best way to see whats going on in the resize script is to goto it in your browser, doing this may show you any errors the script has..

ROCKINDANO · December 10, 2009

i'm sorry but how would i do that?

ROCKINDANO · December 10, 2009

How would i do that?

ROCKINDANO · December 10, 2009

oh k i think i know whats wrong.

would it be the location of the script (the directory where stored) and the location of the image file?

mikesta707 · December 10, 2009

Usually the way you go to a script is to browse to its location on the server...

Buddski · December 10, 2009

if the resizing script is in the same directory as the file you are passing to it it should work..

Are you seeing any errors on the script when you enter it into your browser?

for the sake of it. change ImageJpeg($dst, null, -1); to imagejpeg($dst);

Also I noticed another issue

ImageCopyResize($dt, $src, 0,0,0,0, $tn_width, $tn_height, $width,$height);

should be

imagecopyresized($dst, $src, 0,0,0,0, $tn_width, $tn_height, $width,$height);

We will get there

ROCKINDANO · December 10, 2009

well i can't seem to find the problem. the script gets everything from the file name to size etc... but can't display it to the browser.

Buddski · December 10, 2009

Can you email me the resizing script and ill get it working for you..

send it to [email protected] and ill have it back to you in a jiffy..

ROCKINDANO · December 10, 2009

can you get it from the attachment?

[attachment deleted by admin]

Buddski · December 10, 2009

Remove line 4 and line 36..

You cannot have ANY output from the script otherwise it kills the image..

by removing those 2 prints your code works perfectly..

ROCKINDANO · December 10, 2009

so why doesn't it show the image? if i browse through my main code and see the img tag and click on it it takes me to a page that has file not found.

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resizing images from db

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