程序喵
炫酷的PHP动态验证码，仅在PHP5.6及以上版本才能显示动态效果
代码中用到了 Mirvoshar.ttf 字体，大家可以下载自定义字体路径正确即可。
<?php
/*
炫酷的动态验证码
仅在PHP5.6及以上版本才能显示动态效果
*/
session_start();
$_vc = new ValidateCode();
if(version_compare(PHP_VERSION, '5.6')>=0){
for($a=0;$a<5;$a++){
ob_start();
$_vc->doimg();
$_vc->outPut();
$imagedata[]= ob_get_clean();
}
$gif = new GIFEncoder($imagedata);
Header ('Content-type:image/gif');
echo $gif->GetAnimation();
}else{
$_vc->doimg();
Header ('Content-type:image/png');
$_vc->outPut();
}
$_SESSION["VCode"]=$_vc->getCode();
class ValidateCode {
private $charset = 'QWERTYUIOPASDFGHJKLZXCVBNM1234567890'; //随机因子
private $code; //验证码
private $codelen = 4; //验证码长度
private $width = 200; //宽度
private $height = 50; //高度
private $img; //图形资源句柄
private $font; //指定的字体
private $fontsize = 30; //指定字体大小
private $fontcolor; //指定字体颜色
private $BGcolor=""; //指定字体颜色
//构造方法初始化
public function __construct() {
$this->font = dirname(__FILE__) . '/ttf/Mirvoshar.ttf'; //注意字体路径要写对，否则显示不了图片
}
//生成随机码
public function createCode() {
if($this->code){return;}
$_len = strlen($this->charset) - 1;
for ($i = 0; $i < $this->codelen; $i++) {
$this->code .= $this->charset[mt_rand(0, $_len)];
}
}
//生成背景
public function createBg() {
$this->img = imagecreatetruecolor($this->width, $this->height);
if(!$this->BGcolor){$this->BGcolor=imagecolorallocate($this->img, mt_rand(157, 255), mt_rand(157, 255), mt_rand(157, 255));}
imagefilledrectangle($this->img, 0, $this->height, $this->width, 0, $this->BGcolor);
}
//生成文字
public function createFont() {
$_x = $this->width / $this->codelen;
for ($i = 0; $i < $this->codelen; $i++) {
$this->fontcolor = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
imagettftext($this->img, $this->fontsize, mt_rand(0, 10), $_x * $i + mt_rand(1, 5), $this->height / 1.4, $this->fontcolor, $this->font, $this->code[$i]);
}
}
//生成线条、雪花
public function createLine() {
//线条
for ($i = 0; $i < 6; $i++) {
$color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156));
imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $color);
}
//雪花
for ($i = 0; $i < 100; $i++) {
$color = imagecolorallocate($this->img, mt_rand(200, 255), mt_rand(200, 255), mt_rand(200, 255));
imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color);
}
}
//输出
public function outPut() {
if(version_compare(PHP_VERSION, '5.6')>=0){
imagegif($this->img);
}else{
imagepng($this->img);
}
imagedestroy($this->img);
}
//对外生成
public function doimg($isnewstr) {
$this->createBg();
$this->createCode();
$this->createLine();
$this->createFont();
}
//获取验证码
public function getCode() {
return strtolower($this->code);
}
}
Class GIFEncoder {
var $GIF = "GIF89a"; /* GIF header 6 bytes */
var $VER = "GIFEncoder V2.06"; /* Encoder version */
var $BUF = Array ( );
var $LOP = 0;
var $DIS = 2;
var $COL = -1;
var $IMG = -1;
var $ERR = Array (
'ERR00' =>"Does not supported function for only one image!",
'ERR01' =>"Source is not a GIF image!",
'ERR02' =>"Unintelligible flag ",
'ERR03' =>"Could not make animation from animated GIF source",
);
function GIFEncoder ($GIF_src, $GIF_dly = 100, $GIF_lop = 0, $GIF_dis = 0, $GIF_red = 0, $GIF_grn = 0, $GIF_blu = 0, $GIF_mod = 'bin' )
{
if (!is_array($GIF_src) && !is_array($GIF_tim)) {
printf ( "%s: %s", $this->VER, $this->ERR['ERR00']);
exit( 0 );
}
$this->LOP = ($GIF_lop > -1) ? $GIF_lop : 0;
$this->DIS = ($GIF_dis > -1) ? (( $GIF_dis < 3 ) ? $GIF_dis : 3) : 2;
$this->COL = ($GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1) ? ($GIF_red | ($GIF_grn << 8) | ($GIF_blu << 16)) : -1;
for ($i = 0, $src_count = count($GIF_src); $i < $src_count; $i++ ) {
if (strToLower( $GIF_mod ) == "url") {
$this->BUF[] = fread (fopen($GIF_src [$i], "rb"), filesize ($GIF_src [$i]));
} elseif(strToLower($GIF_mod) == "bin") {
$this->BUF [ ] = $GIF_src [ $i ];
} else {
printf("%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod);
exit(0);
}
if (substr($this->BUF[$i], 0, 6) != "GIF87a" && substr($this->BUF [$i], 0, 6) != "GIF89a") {
printf( "%s: %d %s", $this->VER, $i, $this->ERR ['ERR01']);
exit(0);
}
for ($j = (13 + 3 * (2 << (ord($this->BUF[$i]{10}) & 0x07 ))), $k = TRUE; $k; $j++) {
switch ($this->BUF [$i]{$j}) {
case "!":
if ((substr($this->BUF[$i], ($j + 3), 8)) == "NETSCAPE") {
printf( "%s: %s ( %s source )!", $this->VER, $this->ERR ['ERR03'], ($i + 1));
exit( 0 );
}
break;
case ";":
$k = FALSE;
break;
}
}
}
GIFEncoder::GIFAddHeader();
for($i = 0, $count_buf = count($this->BUF); $i < $count_buf; $i++) {
GIFEncoder::GIFAddFrames($i, $GIF_dly[$i]);
}
GIFEncoder::GIFAddFooter();
}
function GIFAddHeader ( ) {
$cmap = 0;
if (ord($this->BUF[0]{10}) & 0x80 ) {
$cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ]{10} ) & 0x07 ));
$this->GIF .= substr ( $this->BUF [ 0 ], 6, 7);
$this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap);
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . GIFEncoder::GIFWord ( $this->LOP ) . "\0";
}
}
function GIFAddFrames ( $i, $d ) {
$Locals_str = 13 + 3 * (2 <<(ord($this->BUF[$i]{10}) & 0x07));
$Locals_end = strlen($this->BUF[$i]) - $Locals_str - 1;
$Locals_tmp = substr ($this->BUF[$i], $Locals_str, $Locals_end);
$Global_len = 2 << (ord( $this->BUF [0]{10} ) & 0x07 );
$Locals_len = 2 << (ord( $this->BUF[$i]{10}) & 0x07);
$Global_rgb = substr($this->BUF[0], 13, 3 * (2 << ( ord ( $this->BUF[0]{10} ) & 0x07)));
$Locals_rgb = substr ( $this->BUF[$i], 13, 3 * (2 << ( ord ( $this->BUF[$i]{10} ) & 0x07)));
$Locals_ext = "!\xF9\x04" . chr(($this->DIS << 2) + 0) . chr(($d >> 0) & 0xFF) . chr(($d >> 8) & 0xFF) . "\x0\x0";
if ( $this->COL > -1 && ord($this->BUF[$i]{10}) & 0x80) {
for($j = 0; $j < (2 << (ord( $this->BUF[$i]{10}) & 0x07)); $j++ ) {
if(ord ($Locals_rgb{3 * $j + 0}) == ($this->COL >> 0) & 0xFF && ord ( $Locals_rgb { 3 * $j + 1 } ) == ( $this->COL >> 8 ) & 0xFF && ord ( $Locals_rgb { 3 * $j + 2 } ) == ( $this->COL >> 16 ) & 0xFF )
{
$Locals_ext = "!\xF9\x04" . chr(($this->DIS << 2) + 1) . chr (( $d >> 0) & 0xFF) . chr (( $d >> 8) & 0xFF) . chr ($j) . "\x0";
break;
}
}
}
switch ( $Locals_tmp { 0 } ) {
case "!":
$Locals_img = substr($Locals_tmp, 8, 10);
$Locals_tmp = substr($Locals_tmp, 18, strlen ($Locals_tmp) - 18);
break;
case ",":
$Locals_img = substr($Locals_tmp, 0, 10);
$Locals_tmp = substr($Locals_tmp, 10, strlen($Locals_tmp) - 10);
break;
}
if ( ord ( $this->BUF[$i]{10} ) & 0x80 && $this->IMG > -1 ) {
if ( $Global_len == $Locals_len ) {
if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
else {
$byte = ord ( $Locals_img{9});
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ 0 ]{10}) & 0x07);
$Locals_img{9} = chr($byte);
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp);
}
}
else {
$byte = ord($Locals_img{9});
$byte |= 0x80;
$byte &= 0xF8;
$byte |= (ord($this->BUF[$i]{10}) & 0x07);
$Locals_img {9} = chr($byte);
$this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp);
}
} else {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
$this->IMG = 1;
}
function GIFAddFooter ( ) {
$this->GIF .= ";";
}
function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
for ( $i = 0; $i < $Len; $i++ ) {
if($GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } || $GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } || $GlobalBlock { 3 * $i + 2 } != $LocalBlock{3 * $i + 2})
{
return ( 0 );
}
}
return ( 1 );
}
function GIFWord ( $int ) {
return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
}
function GetAnimation ( ) {
return ($this->GIF);
}
}效果图如下
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