Thumbnails from a directory

Rendair · 12-02-2007, 06:59 PM

I have this code i did a awhile ago to create thumbnails out of images from a directory on your web server.

PHP Code:


			
function createthumb($name,$filename,$new_w,$new_h)

{

    $system=explode('.',$name);

    if (preg_match('/jpg|jpeg/',$system[1])){

        $src_img=imagecreatefromjpeg($name);

    }

    if (preg_match('/png/',$system[1])){

        $src_img=imagecreatefrompng($name);

    }

    

    $old_x=imageSX($src_img);

    $old_y=imageSY($src_img);

    if ($old_x > $old_y) {

        $thumb_w=$new_w;

        $thumb_h=$old_y*($new_h/$old_x);

    }

    if ($old_x < $old_y) {

        $thumb_w=$old_x*($new_w/$old_y);

        $thumb_h=$new_h;

    }

    if ($old_x == $old_y) {

        $thumb_w=$new_w;

        $thumb_h=$new_h;

    }

    

    $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);

    imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 

    

        if (preg_match("/png/",$system[1]))

    {

        imagepng($dst_img,$filename); 

    } else {

        imagejpeg($dst_img,$filename); 

    }

    

    imagedestroy($dst_img); 

    imagedestroy($src_img); 

}

Create thumbnails and display the results

PHP Code:


			
$path = "images/";

$img_dir = @opendir($path);

$entriesperline=3; //Number of images on each row of the table

$counter=1;

 

 

while ($img_file = readdir($img_dir))

{

 createthumb('images/'.$img_file,'thumbs/tn_'.$img_file,100,100); 

}  



$path = "images/";

$img_dir = @opendir($path);

$entriesperline=5;

$counter=1;  

echo "<center><table border='0' width=600 cellspacing=0 cellpadding=5 class=gallery>";

while ($img_file = readdir($img_dir))

{

$filetype = filetype($img_file);

if($img_file!="." && $img_file!=".." && $filetype!="dir")



if($counter%$entriesperline==1)

{

echo "<tr><td><a href=\"images/$img_file\" rel=\"thumbnail\"><img src=thumbs/tn_$img_file border=5></a> </td>";

}

else if($counter%$entriesperline==0)

{

echo "<td><a href=\"images/$img_file\" rel=\"thumbnail\"><img src=thumbs/tn_$img_file border=5></a> </td></tr>";

}

else

{

echo "<td><a href=\"images/$img_file\" rel=\"thumbnail\"><img src=thumbs/tn_$img_file border=5></a> </td>";

}

$counter++;

} //exit loop

$counter--;

if($counter%$entriesperline!=0)

{

echo "</tr>";

}

echo "</table></center>";

The function can easily be set up just to create one thumbnail

PHP Code:


			
createthumb('link to original image','thumbnail new name and location',width,height);

The new thumbnail should work out the ratio so the image is the same dimensions, but smaller version.

Gets the job done i feel :)