scriptje..

$image_new = "".$plaatje->imgurl.""; //url of picture 
$image_new = str_replace(' ','%20',$image_new); //take url and replace spaces 
$max_width= "250";  //maximum width allowed for pictures 
$resize_width= "250";  //same as max width 
$max_height= "20";  //maximum width allowed for pictures 
$resize_height= "20";  //same as max width 
$size = getimagesize("$image_new");    //get the actual size of the picture 
$width= $size[0];          // get width of picture 
$height= $size[1];  // get height of picture 
if ($width>$max_width){ 
           $new_width=$resize_width;  // Resize Image If over max width  
}

else { 
           $new_width=$width;      // Keep original size from array because smaller than max 

} 

echo "<IMG src=\"$image_new\" border=1  width=$new_width>";  //print image with new width

$image_new = "".$plaatje->imgurl.""; //url of picture 
$image_new = str_replace(' ','%20',$image_new); //take url and replace spaces 
$max_width= "250";  //maximum width allowed for pictures 
$resize_width= "250";  //same as max width 
$max_height= "20";  //maximum width allowed for pictures 
$resize_height= "20";  //same as max width 
$size = getimagesize("$image_new");    //get the actual size of the picture 
$width= $size[0];          // get width of picture 
$height= $size[1];  // get height of picture 
if ($width>$max_width){ 
           $new_width=$resize_width;  // Resize Image If over max width  
}
 
else { 
           $new_width=$width;      // Keep original size from array because smaller than max 
 
} 
 
echo "<IMG src=\"$image_new\" border=1  width=$new_width>";  //print image with new width