PHP写的验证码_PHP教程
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2023-12-28 15:34:34
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PHP写的验证码
header('content-type:image/png');$w = 200;
$h = 50;
$i = imagecreatetruecolor($w,$h);
$bgc = imagecolorallocate($i,251,251,251);
imagefill($i,0,0,$bgc);
function getStr($len = 4){
$str = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$s = '';
for($i=0;$i $s.=$str{mt_rand(0,strlen($str)-1)};
}
return $s;
}
//$c = imagecolorallocate($i,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
//imagettftext($i,20,mt_rand(0,10),10,35,$c,'font/h.ttf',getStr(10));
$s = getStr(6);
for($n=0;$n
imagettftext($i,mt_rand(15,30),mt_rand(-15,30),10+($n*18),mt_rand(25,35),$c,'font/h.ttf',$s{$n});
}
$s = getStr(20);
for($n=0;$n
imagettftext($i,mt_rand(5,10),mt_rand(-15,30),mt_rand(0,$w),mt_rand(0,$h),$c,'font/h.ttf',$s{$n});
}
imagepng($i);
imagedestroy($i);