PHP缩略图生成程序 txt

$FILENAME="image_name"; 

// 生成图片的宽度 
$RESIZEWIDTH=400; 
<? 

$FILENAME="image_name"; 

// 生成图片的宽度 
$RESIZEWIDTH=400; 

// 生成图片的高度 
$RESIZEHEIGHT=400; 


function ResizeImage($im,$maxwidth,$maxheight,$name){ 
$width = imagesx($im); 
$height = imagesy($im); 
if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){ 
if($maxwidth && $width > $maxwidth){ 
$widthratio = $maxwidth/$width; 
$RESIZEWIDTH=true; 
} 
if($maxheight && $height > $maxheight){ 
$heightratio = $maxheight/$height; 
$RESIZEHEIGHT=true; 
} 
if($RESIZEWIDTH && $RESIZEHEIGHT){ 
if($widthratio < $heightratio){ 
$ratio = $widthratio;