demo:
descarga: http://test.drawcoders.net/captcha/captcha.zip
rutas:
Código:
C:\xampp\htdocs\captcha>tree /f
Listado de rutas de carpetas
El número de serie del volumen es 00000200 BAEF:7637
C:.
│ index.php
│
└───includes
captcha_fuente(bad).ttf
captcha_fuente(beatnik).ttf
captcha_fuente(belweb).ttf
captcha_fuente(BERTRAMN).ttf
captcha_fuente(butch).ttf
captcha_fuente(cadellin).ttf
captcha_fuente(candles).ttf
GIFEncoder.class.php
Listado de rutas de carpetas
El número de serie del volumen es 00000200 BAEF:7637
C:.
│ index.php
│
└───includes
captcha_fuente(bad).ttf
captcha_fuente(beatnik).ttf
captcha_fuente(belweb).ttf
captcha_fuente(BERTRAMN).ttf
captcha_fuente(butch).ttf
captcha_fuente(cadellin).ttf
captcha_fuente(candles).ttf
GIFEncoder.class.php
captcha.php
Código
<?php
$captcha = new captcha();
if((int)$_GET['seg'] == 0){
$captcha->mostrar(0);
}elseif((int)$_GET['seg'] == 2){
$captcha->mostrar(2);
}else{ /* 1 */
$captcha->mostrar(1);
}
class captcha{
var $dir_data;
function __construct(){
$this->dir_data = './includes/';
}
function obtener_hash(){
return $_SESSION['CAPTCHA'];
session_destroy();
}
function establecer_hash(){
$hash = strtoupper(str_ireplace(
array('o','0','i','l','1','y','s','5','8','7','t','6','b','d','u','q','2','z'),
array('f','r','p','w','x','k','9','a','3','a','m','w','f','3','e','h','c','n'),
substr(sha1(time().rand(0,100)), 0, 4)
));
$_SESSION['CAPTCHA'] = $hash;
return $hash;
}
function color_azar($handle){
return imagecolorallocate($handle, rand(0,255), rand(0,255), rand(0,255));
}
function crear_frame($buffer, $fuente, $seguridad = 1){
/* Configuraciones */
$alto = 25;
$ancho = 160;
$lineas = 30;
$handle = imagecreate($ancho, $alto);
if($seguridad <= '1'){ /* Seguridad igual o menor a 1 */
$blanco = imagecolorallocate($handle, 255, 255, 255);
$negro = imagecolorallocate($handle, 51, 51, 51);
}elseif($seguridad >= '2'){ /* Seguridad igual o mayor a 2 */
$blanco = imagecolorallocate($handle, rand(0, 255), rand(0, 255), rand(0, 255));
$negro = imagecolorallocate($handle, rand(0, 255), rand(0, 255), rand(0, 255));
}
/* Agrega las lineas */
if($seguridad >= '1'){ /* Seguridad igual o mayor a 1 */
for($cuenta = 1; $cuenta <= $lineas; $cuenta++){
imageline($handle, rand(0,$ancho), 0, rand(0,$ancho), 25, $this->color_azar($handle));
}
}
imagettftext($handle, 20, 0, 22, 22, $negro, $fuente, strtoupper($buffer));
ob_end_clean(); /* Elimina la declaración de inicio de buffers anteriores en el motor */
ob_start(); /* Comienza a capturar buffer */
imagegif($handle); /* Crea imagen */
$retorno = ob_get_contents(); /* Vuelca el contenido a la variable */
imagedestroy($handle); /* Libera memoria */
ob_end_clean(); /* Destruye el buffer */
return $retorno; /* Retorna el buffer de la imagen */
}
function mostrar($seguridad = 1){
/* Seguridad va del 0 al 2 */
$string = $this->establecer_hash();
include($this->dir_data .'GIFEncoder.class.php');
$cantidad_frames = 10;
$fuente = glob($this->dir_data .'/captcha_fuente(*).ttf');
$fuente = $fuente[(int)rand(0, count($fuente) - 1)];
for($cuenta = 0; $cuenta <= $cantidad_frames; $cuenta++){
$buffer = $this->crear_frame($string, $fuente, $seguridad);
$rutas_frames[$cuenta] = sys_get_temp_dir().'/'.md5(microtime().rand(10, 500)).'.gif';
file_put_contents($rutas_frames[$cuenta], $buffer);
unset($buffer);
}
$gif = new GIFEncoder($rutas_frames, false, 0, 2, 0, 0, 0, 'url');
foreach($rutas_frames as $eliminar){
@unlink($eliminar);
}
header('Content-type: image/gif');
echo $gif->GetAnimation();
exit;
}
}
?>
GIFEncoder.class.php
Código
<?php
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
::
:: This class is a rewritten 'GifMerge.class.php' version.
::
:: Modification:
:: - Simplified and easy code,
:: - Ultra fast encoding,
:: - Built-in errors,
:: - Stable working
::
::
:: Updated at 2007. 02. 13. '00.05.AM'
::
::
::
:: Try on-line GIFBuilder Form demo based on GIFEncoder.
::
:: http://gifs.hu/phpclasses/demos/GifBuilder/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/
Class GIFEncoder {
var $GIF = "GIF89a"; /* GIF header 6 bytes */
var $VER = "GIFEncoder V2.05"; /* 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=>"Does not make animation from animated GIF source",
);
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder...
::
*/
function GIFEncoder (
$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
) {
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; $i < count ( $GIF_src ); $i++ ) {
if ( strToLower ( $GIF_mod ) == "url" ) {
$this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
}
else if ( 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; $i < count ( $this->BUF ); $i++ ) {
GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
}
GIFEncoder::GIFAddFooter ( );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddHeader...
::
*/
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";
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFrames...
::
*/
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 >> 16 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 1 } ) == ( ( $this->COL >> 8 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 2 } ) == ( ( $this->COL >> 0 ) & 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;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFooter...
::
*/
function GIFAddFooter ( ) {
$this->GIF .= ";";
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFBlockCompare...
::
*/
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 );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFWord...
::
*/
function GIFWord ( $int ) {
return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GetAnimation...
::
*/
function GetAnimation ( ) {
return ( $this->GIF );
}
}
?>










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