一个用图片显示来访者ip的例子

<?php

Header("Content-type: image/PNG");

$myip=$REMOTE_ADDR;

$im = imagecreate(158,35);

$bkg = ImageColorAllocate($im, 128,128,128 ); //背景色

$red = ImageColorAllocate($im, 204,204,204 ); //红色

$blue = ImageColorAllocate($im, 255,255,255 ); //蓝色

for ($i = 0; $i < strlen($myip); $i++) {

imagestring($im, 3, $i*10+5, 0, substr($myip,$i,1), $blue);//ImageColorAllocate($im,rand(5, 255),rand(5, 255),rand(5, 255))改成这样就成了随机色

}

imagestring($im,3,5,10,"--------------------",$red);

imagestring($im,3,20,20,"Designed By Arcow",$red);

ImagePNG($im);

ImageDestroy($im);

?>