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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