$maxwidth) || ($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 $ratio = $widthratio; }else{ $ratio = $heightratio; } }elseif($resizewidth){ $ratio = $widthratio; }elseif($resizeheight){ $ratio = $heightratio; } $newwidth = $width * $ratio; $newheight = $height * $ratio; if(function_exists(imagecopyresampled)){ $newim = imagecreatetruecolor($newwidth, $newheight); imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); }else{ $newim = imagecreate($newwidth, $newheight); imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); } imagejpeg ($newim,$name . .jpg); imagedestroy ($newim); }else{ imagejpeg ($im,$name . .jpg); } }if($_files['image']['size']){
if($_files['image']['type'] == image/pjpeg){ $im = imagecreatefromjpeg($_files['image']['tmp_name']); }elseif($_files['image']['type'] == image/x-png){ $im = imagecreatefrompng($_files['image']['tmp_name']); }elseif($_files['image']['type'] == image/gif){ $im = imagecreatefromgif($_files['image']['tmp_name']); } if($im){ if(file_exists($filename.jpg)){ unlink($filename.jpg); } resizeimage($im,$resizewidth,$resizeheight,$filename); imagedestroy ($im); } } ?>
复制代码
2，测试代码(demo.php)
复制代码