须GD库支持
<?php
Header("Content-type: image/jpeg");
dl("php_gd.dll");
$n=6;
$im = imagecreatefromJPEG('welcome.jpg');
$im2 = imagecreate(imagesx($im)/$n,imagesy($im)/$n);
$white = ImageColorAllocate($im2, 255,255,255);
imagecolortransparent($im2,$white);imagecopyresized($im2,$im,0,0,0,0,imagesx($im)/$n,imagesy($im)/$n,imagesx($im),imagesy($im));
ImageJPEG($im2);
ImageDestroy($im);
?>
<?php
Header("Content-type: image/jpeg");
dl("php_gd.dll");
$n=6;
$im = imagecreatefromJPEG('welcome.jpg');
$im2 = imagecreate(imagesx($im)/$n,imagesy($im)/$n);
$white = ImageColorAllocate($im2, 255,255,255);
imagecolortransparent($im2,$white);imagecopyresized($im2,$im,0,0,0,0,imagesx($im)/$n,imagesy($im)/$n,imagesx($im),imagesy($im));
ImageJPEG($im2);
ImageDestroy($im);
?>
src="http://www.csdn.net/images/csdn.gif"
onload="if(this.clientWidth>100)this.width=100; this.style.display=''"
>