<?php
session_start();
function random($len=4) {
$srcstr="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
mt_srand();
$str="";
for($i=0;$i<$len;$i++) {
$str.=$srcstr[mt_rand(0,61)];
}
return $str;
}
$str=random(4);
$_SESSION['_register_rand_number'] = strtoupper($str);
function genimg($str,$width=150,$height=30) {
$im=imagecreate($width,$height);
//背景色
$back=imagecolorallocate($im,0xFF,0xFF,0xFF);
//模糊点颜色
$pix=imagecolorallocate($im,0x68,0x80,0x38);
//字体色
$font=imagecolorallocate($im,0,0,0);
//绘模糊作用的点
mt_srand();
for($i=0;$i<1000;$i++) {
imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$pix);
}
//写字,选择ComicSansMS字体
imagettftext($im,24,0,10,25,$font,"comic.ttf",$str);
//imagestring($im,5,3,3,$str,$font);
imagerectangle($im,0,0,$width-1,$height-1,$font);
header("Content-Type:image/png");
imagepng($im);
imagedestroy($im);
}
genimg($str,90,30);
?>
session_start();
function random($len=4) {
$srcstr="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
mt_srand();
$str="";
for($i=0;$i<$len;$i++) {
$str.=$srcstr[mt_rand(0,61)];
}
return $str;
}
$str=random(4);
$_SESSION['_register_rand_number'] = strtoupper($str);
function genimg($str,$width=150,$height=30) {
$im=imagecreate($width,$height);
//背景色
$back=imagecolorallocate($im,0xFF,0xFF,0xFF);
//模糊点颜色
$pix=imagecolorallocate($im,0x68,0x80,0x38);
//字体色
$font=imagecolorallocate($im,0,0,0);
//绘模糊作用的点
mt_srand();
for($i=0;$i<1000;$i++) {
imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$pix);
}
//写字,选择ComicSansMS字体
imagettftext($im,24,0,10,25,$font,"comic.ttf",$str);
//imagestring($im,5,3,3,$str,$font);
imagerectangle($im,0,0,$width-1,$height-1,$font);
header("Content-Type:image/png");
imagepng($im);
imagedestroy($im);
}
genimg($str,90,30);
?>
<?php
session_start();
echo $_SESSION['_register_rand_number'];
?>