這段代碼很不錯，我一直用
複製內容到剪貼板
代碼:
<?php
$codename = "verifycode";
$border = true;
$noise = true;
$color['number'] = "#E32A3F";
$color['letter'] = "#113F72";
$color['bg'] = "#CCFF00";
$color['border'] = "#AAB90F";
$noisenum = 9;
$length = 4;
$width = 60;
$height = 20;
$x = 8; //
$y = 2; //
//------ end config ---------
$image = imagecreate($width, $height);
$backcolor = getcolor($color['bg']);
imagefilledrectangle($image, 0, 0, $width, $height, $bgcolor);
$textall = array_merge(range('A', 'Z'), range(0,9));
$cW = ($width-1.5*$x)/$length;
for ($i = 0; $i < $length; $i++) {
$tmptext = rand(0, 35);
$randtext = $textall["$tmptext"];
$code .= $randtext;
$cX = $x + $i*$cW;
if(is_numeric($randtext)){
$textColor = getcolor($color['number']);
}else{
$textColor = getcolor($color['letter']);
}
imagestring($image, 5, $cX, $y, $randtext, $textColor);
}
if ($noise) setnoise();
if ($border){
$bordercolor = getcolor($color['border']);
imagerectangle($image, 0, 0, $width - 1, $height - 1, $bordercolor);
}
session_start();
session_register("{$codename}");
$_SESSION["{$codename}"] = $code;
header("Content-type: image/png");
imagepng($image);
imagedestroy($image);
function getcolor($color) {
global $image;
$color = eregi_replace("^#", "", $color);
$r = $color[0] . $color[1];
$r = hexdec($r);
$b = $color[2] . $color[3];
$b = hexdec($b);
$g = $color[4] . $color[5];
$g = hexdec($g);
$color = imagecolorallocate($image, $r, $b, $g);
return $color;
}
function setnoise() {
global $image, $width, $height, $bgcolor, $noisenum;
for ($i = 0; $i < $noisenum; $i++) {
$randColor = imagecolorallocate($image, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($image, rand(0, $width), rand(0, $height), $randColor);
}
}
?>[
本帖最後由 小豬不笨 於 2007-6-1 05:19 PM 編輯 ]
