Joomla! 验证码插件

<?php /** * Generic Captcha Plugin for Joomla! 1.5 * @author bigodines * <b>info</b>: http://www.bigodines.com / or (in portuguese) http://www.joomla.com.br * * * I'm using the same plugin structure as 'OSTCaptcha' by CoolAcid so you can easily replace one to the other. * If you can't find the features you want here, maybe you can try his: * http://forum.joomla.org/index.php/topic,218637.0.html */ // Check to ensure this file is included in Joomla! defined('_JEXEC') or die(); //include_once "GIFEncoder.class.php"; //include_once "Functions.php"; Define ( 'MUL', 0.017453292519943295 ); Define ( 'ANIM_FRAMES', 8 ); Define ( 'ANIM_DELAYS', 10 ); define('r','r'); define('g','g'); define('b','b'); /* ::::::::::::::::::::::::::::::::::::::::::::::::: :: :: :: :: :: Class Flag :: :: :: :: :: ::::::::::::::::::::::::::::::::::::::::::::::::: */ Class Flag { var $kx, $ky, $kz; var $ro, $ow, $oh; var $px, $of, $im; /* ::::::::::::::::::::::::::::::::::::::::::::: :: :: :: F L A G :: :: :: ::::::::::::::::::::::::::::::::::::::::::::: */ function Flag ( $w, $h, $o ) { $this->ro = new Rotator ( ); $this->kx = 0.029999999999999999; $this->ky = 0.01; $this->kz = 8; $this->ow = $w; $this->oh = $h; $this->px = $o; $this->im = Array ( r=>255, g=>255, b=>255 ); } /* ::::::::::::::::::::::::::::::::::::::::::::: :: :: :: F V A L U E :: :: :: ::::::::::::::::::::::::::::::::::::::::::::: */ function FValue ( $i, $c ) { $ow = $this->ow; $oh = $this->oh; $this->ro->SetRotation ( 0, 15, 0 ); for ( $j = 0; $j < $this->ow; $j++ ) { for ( $k = 0; $k < $this->oh; $k++ ) { $C00 = Flag::ZValue ( $j, $k, $i ); $C01 = $this->ro->RotatePoints ( Array ( $j, $k, $C00 ) ); $C02 = $k * $this->ow + $j; $this->of [ $C02 ] = new FramePoint ( $C01 [ 0 ], $C01 [ 1 ] - ( $this->oh / 2 ), $C01 [ 2 ], $this->px [ $C02 ] ); $C03 = $this->of [ $C02 ]->c [ r ]; $C04 = $this->of [ $C02 ]->c [ g ]; $C05 = $this->of [ $C02 ]->c [ b ]; $C06 = ( $C00 + 50 ) / 100; $C06 = ( $C06 + $C06 ) - 1.0; if ( $C06 > 0.0 ) { $C03 = ( $C03 + ( 255 - $C03 ) * $C06 ); $C04 = ( $C04 + ( 255 - $C04 ) * $C06 ); $C05 = ( $C05 + ( 255 - $C05 ) * $C06 ); } else { if ( $C06 < 0.0 ) { $C03 = ( $C03 - $C03 * $C06 * -1 ); $C04 = ( $C04 - $C04 * $C06 * -1 ); $C05 = ( $C05 - $C05 * $C06 * -1 ); } } $this->of [ $C02 ]->c [ r ] = $C03; $this->of [ $C02 ]->c [ g ] = $C04; $this->of [ $C02 ]->c [ b ] = $C05; } } $w = $ow + 4; $h = $oh + 4; for ( $i = 0; $i < ($w * $h); $i++ ) { $this->im [ $i ] [ r ] = $c [ r ]; $this->im [ $i ] [ g ] = $c [ g ]; $this->im [ $i ] [ b ] = $c [ b ]; } for ( $i = 0; $i < count ( $this->of ); $i++ ) { $C07 = $this->of [ $i ]->PointX ( ); $C08 = $this->of [ $i ]->PointY ( ) + round ( $this->oh / 2 ); if ( $C07 < $this->ow - 1 && $C08 < $this->oh - 1 && $C07 > 0 && $C08 > 0 ) { $this->im [ $C08 * $this->ow + $C07 ] [ r ] = $this->of [ $i ]->c [ r ]; $this->im [ $C08 * $this->ow + $C07 ] [ g ] = $this->of [ $i ]->c [ g ]; $this->im [ $C08 * $this->ow + $C07 ] [ b ] = $this->of [ $i ]->c [ b ]; $this->im [ $C08 * $this->ow + $C07 + 1 ] [ r ] = $this->of [ $i ]->c [ r ]; $this->im [ $C08 * $this->ow + $C07 + 1 ] [ g ] = $this->of [ $i ]->c [ g ]; $this->im [ $C08 * $this->ow + $C07 + 1 ] [ b ] = $this->of [ $i ]->c [ b ]; $this->im [ ( $C08 + 1 ) * $this->ow + $C07 ] [ r ] = $this->of [ $i ]->c [ r ]; $this->im [ ( $C08 + 1 ) * $this->ow + $C07 ] [ g ] = $this->of [ $i ]->c [ g ]; $this->im [ ( $C08 + 1 ) * $this->ow + $C07 ] [ b ] = $this->of [ $i ]->c [ b ]; if ( $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ r ] == $c [ r ] && $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ g ] == $c [ g ] && $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ b ] == $c [ b ] ) { $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ r ] = $this->of [ $i ]->c [ r ]; $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ g ] = $this->of [ $i ]->c [ g ]; $this->im [ ( $C08 * $this->ow + $C07 ) - 1 ] [ b ] = $this->of [ $i ]->c [ b ]; } if ( $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ r ] == $c [ r ] && $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ g ] == $c [ g ] && $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ b ] == $c [ b ] ) { $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ r ] = $this->of [ $i ]->c [ r ]; $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ g ] = $this->of [ $i ]->c [ g ]; $this->im [ ( $C08 - 1 ) * $this->ow + $C07 ] [ b ] = $this->of [ $i ]->c [ b ]; } } } } /* ::::::::::::::::::::::::::::::::::::::::::::: :: :: :: Z V A L U E :: :: :: ::::::::::::::::::::::::::::::::::::::::::::: */ function ZValue ( $i, $j, $k ) { $this->kx = 0.029999999999999999 + ( 11 * $i ) / ( $this->ow * $this->ow ); $this->ky = 0.01 + ( 4.4000000000000004 * $i ) / ( $this->ow * $this->ow ); if ( $i < ( $this->ow / 6 ) ) { $this->kz = 1.0 + $i * ( 8 / ( $this->ow / 6 ) ); } else { $this->kz = 8; } $f = ( ( $k * 0.017453292519943295 - $this->kx * $i ) + $this->ky * $j ); $l = intval ( $this->kz * sin ( $f ) + 0.5 ); return ( $l ); } /* ::::::::::::::::::::::::::::::::::::::::::::: :: :: :: A N I M A T E D O U T :: :: :: ::::::::::::::::::::::::::::::::::::::::::::: */ function AnimatedOut ( ) { $bg = Array ( r=>134, g=>170, b=>191 ); $im = imageCreateTrueColor ( $this->ow, $this->oh ); for ( $i = 0; $i < ANIM_FRAMES; $i++ ) { Flag::FValue ( ( 360 / ANIM_FRAMES ) * $i, $bg ); for ( $x = 0; $x < $this->ow; $x++ ) { for ( $y = 0; $y < $this->oh; $y++ ) { $p = $y * $this->ow + $x; imageSetPixel ( $im, $x, $y, ( $this->im [ $p ] [ r ] << 16 ) | ( $this->im [ $p ] [ g ] << 8 ) | ( $this->im [ $p ] [ b ] << 0 ) ); } } ob_start ( ); imageGif ( $im ); $frames [ ] = ob_get_contents ( ); $framed [ ] = 10; ob_end_clean ( ); } imageDestroy ( $im ); $gif = new GIFEncoder ( $frames, $framed, 0, 2, -1, -1, -1, "bin" ); return ( $gif->GetAnimation ( ) ); } } /* ::::::::::::::::::::::::::::::::::::::::::::::::: :: :: :: :: :: Class Rotator Extends Flag :: :: :: :: :: ::::::::::::::::::::::::::::::::::::::::::::::::: */ Class Rotator extends Flag { var $ct; var $st; var $cp; var $sp; var $cg; var $sg; /* ::::::::::::::::::::::::::::::::::::::::::::: ::