php代码
<?php
function code(){
$im = imagecreatetruecolor(100, 40);
$black = imagecolorallocate($im, 0, 0, 0);
$white = imagecolorallocate($im, 255, 255, 255);
imagefill($im,0,0,$white);
$strarr=array_merge(range(0,9),range(a,z),range(A,Z));
shuffle($strarr);
$str=join(array_slice($strarr,0,4));
$mm=rand(0,40);
$aaa=rand(0,0);
$bbb=rand(0,255);
$ccc=rand(0,255);
$color1=imagecolorallocate($im,$aaa,$bbb,$ccc);
imagestring($im,5,$mm,10,$str,$color1);
for($i=0;$i<700;$i++){
$aa=rand(0,255);
$bb=rand(0,255);
$cc=rand(0,255);
$color=imagecolorallocate($im,$aa,$bb,$cc);
$a=rand(0,100);
$b=rand(0,40);
imagesetpixel($im,$a,$b,$color);
}
for($t=0;$t
