Script Anti-span
CaptchaSecurityImages.php
<?php
session_start();
class CaptchaSecurityImages {
var $font = 'monofont.ttf';
function generateCode($characters) {
/* list all possible characters, similar looking characters and vowels have been removed */
$possible = '234567890bcdfghjkmnpqrstvwxyz';
$code = '';
$i = 0;
while ($i < $characters) {
$code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
$i++;
}
return $code;
}
function CaptchaSecurityImages($width='120',$height='40',$characters='6') {
$code = $this->generateCode($characters);
/* font size will be 75% of the image height */
$font_size = $height * 0.75;
$image = @imagecreate($width, $height) or die('Não é possível inicializar fluxo nova imagem GD');
/* set the colours */
$background_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 20, 40, 100);
$noise_color = imagecolorallocate($image, 100, 120, 180);
/* generate random dots in background */
for( $i=0; $i<($width*$height)/3; $i++ ) {
imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
}
/* generate random lines in background */
for( $i=0; $i<($width*$height)/150; $i++ ) {
imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
}
/* create textbox and add text */
$textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Erro na função imagettfbbox');
$x = ($width - $textbox[4])/2;
$y = ($height - $textbox[5])/2;
imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Erro na função imagettftext');
/* output captcha image to browser */
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);
$_SESSION['security_code'] = $code;
}
}
$width = isset($_GET['width']) ? $_GET['width'] : '120';
$height = isset($_GET['height']) ? $_GET['height'] : '40';
$characters = isset($_GET['characters']) && $_GET['characters'] > 1 ? $_GET['characters'] : '6';
$captcha = new CaptchaSecurityImages($width,$height,$characters);
?>
Formulario:
<?php
session_start();
if( isset($_POST['submit'])) {
if( $_SESSION['security_code'] == $_POST['security_code'] && !empty($_SESSION['security_code'] ) ) {
// Insert you code for processing the form here, e.g emailing the submission, entering it into a database.
echo 'Thank you. Your message said "'.$_POST['message'].'"';
unset($_SESSION['security_code']);
} else {
// Insert your code for showing an error message here
echo 'Sorry, you have provided an invalid security code';
}
} else {
?>
<form action="form.php" method="post">
<img src="CaptchaSecurityImages.php?width=100&height=40&characters=5" /><br />
<label for="security_code">Security Code: </label><input id="security_code" name="security_code" type="text" /><br />
<input type="submit" name="submit" value="Submit" />
</form>
<?php
}
?>Esta parte de cima o codigo do anti-spam
Agora o condigo do meu fomulario que estou querendo fazer a junção.
<form action="?pg=comentarios" method=post enctype="multipart/form-data" name=formMaker onsubmit="return validar(this)">
<input name="acao" type="hidden" value="add_comentario">
<input name="id" type="hidden" value="<? echo $id?>">
<table border="0" align="center" cellpadding="2" cellspacing="0">
<tr valign=middle>
<td align=right style="border-bottom:1px solid #cccccc;border-top:1px solid #cccccc;">Nome:</td>
<td width="300" style="border-bottom:1px solid #cccccc;border-top:1px solid #cccccc;">
<input name="nome" type="text" size="45"></td>
</tr>
<tr valign=middle>
<td align=right style="border-bottom:1px solid #cccccc">Comentário</td>
<td style="border-bottom:1px solid #cccccc"><textarea name="comentarios" cols="44" rows="5" id="comentarios"></textarea></td>
</tr>
<tr valign=middle>
<td align=right style="border-bottom:1px solid #cccccc">Código de Segurança:</td>
<td style="border-bottom:1px solid #cccccc"><img src="estrutura/captcha/CaptchaSecurityImages.php?width=100&height=40&characters=5" /> <input id="security_code" name="security_code" type="text" /></td>
</tr>
<tr align="center" valign=middle>
<td colspan="2"><input type=submit name=Submit value="Cadastrar">
<input type=reset name=Submit2 value="Limpar"></td>
</tr>
</table>
</form>
//Aqui seria onde eu coloca o codigo para fazer a verificação da img não estou conseguindo fazer isto.
Alguém poderia me ajudar qual melhor forma de fazer isto.
<?
}
if($acao == "add_comentario"){
$sql = "INSERT INTO noticias_comentarios VALUES ('', '$id', '$nome', '$cidade', '$data', '$comentarios')";
$sql = mysql_query($sql);
//echo $sql;
echo "
<br>
<br>
<center><h4>Comentário enviado com Sucesso!</h4></center>
<meta http-equiv='refresh' content='2;URL=?pg=ler_noticia&id=$id'>
";
}
?>
