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	<title>Fogliarini Brolesi &#187; Acessibilidade</title>
	<atom:link href="http://fabio.freesandbox.net/category/acessibilidade/feed/" rel="self" type="application/rss+xml" />
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	<description>Educação e programação</description>
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			<item>
		<title>Aviso aos assinantes</title>
		<link>http://fabio.freesandbox.net/aviso-aos-assinantes/</link>
		<comments>http://fabio.freesandbox.net/aviso-aos-assinantes/#comments</comments>
		<pubDate>Thu, 21 May 2009 12:00:00 +0000</pubDate>
		<dc:creator>Fabio Brolesi</dc:creator>
				<category><![CDATA[Acessibilidade]]></category>
		<category><![CDATA[Programação]]></category>

		<guid isPermaLink="false">http://fabio.freesandbox.net/?p=266</guid>
		<description><![CDATA[Pessoal, as pessoas que estão assinando o feed pelo FeedBurner, peço por favor para trocarem a URL para http://feeds2.feedburner.com/Fogliarini-Brolesi, que é o novo. O antigo estava com alguns problemas. Em breve, novidades para vocês.]]></description>
			<content:encoded><![CDATA[<p>Pessoal,</p>
<p>as pessoas que estão assinando o <a href="http://pt.wikipedia.org/wiki/Feed" target="_blank">feed</a> pelo FeedBurner, peço por favor para trocarem a URL para <a href="http://feeds2.feedburner.com/Fogliarini-Brolesi">http://feeds2.feedburner.com/Fogliarini-Brolesi</a>, que é o novo. O antigo estava com alguns problemas.</p>
<p>Em breve, novidades para vocês.</p>
]]></content:encoded>
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		<item>
		<title>Captcha humanizado</title>
		<link>http://fabio.freesandbox.net/captcha-humanizado/</link>
		<comments>http://fabio.freesandbox.net/captcha-humanizado/#comments</comments>
		<pubDate>Mon, 29 Sep 2008 01:39:52 +0000</pubDate>
		<dc:creator>Fabio Brolesi</dc:creator>
				<category><![CDATA[Acessibilidade]]></category>
		<category><![CDATA[Orientação a Objetos]]></category>
		<category><![CDATA[PHP]]></category>
		<category><![CDATA[Programação]]></category>
		<category><![CDATA[captcha]]></category>
		<category><![CDATA[classe]]></category>
		<category><![CDATA[OOP]]></category>

		<guid isPermaLink="false">http://fabio.freesandbox.net/?p=112</guid>
		<description><![CDATA[Para quem não sabe o que é captcha, em linhas gerais são aquelas palavras, letras ou conjunto de letras/números que verificam se quem está enviando a informação para outra pessoa é uma pessoa mesmo. Pensando num meio de fazer isso de modo mais acessível, utilizei as idéias de Ed Eliot para fazer um script em [...]]]></description>
			<content:encoded><![CDATA[<p>Para quem não sabe o que é <a title="captcha" href="http://pt.wikipedia.org/wiki/CAPTCHA" target="_blank">captcha</a>, em linhas gerais são aquelas palavras, letras ou conjunto de letras/números que verificam se quem está enviando a informação para outra pessoa é uma pessoa mesmo.</p>
<p>Pensando num meio de fazer isso de modo mais acessível, utilizei as idéias de <a title="Ed Eliot" href="http://www.ejeliot.com/pages/2" target="_blank">Ed Eliot</a> para fazer um script em PHP que fosse mais amigável também para quem tem visão subnormal ou de alguma forma utiliza softwares que lêem caracteres em tela.</p>
<p>É uma versão bem básica e simplificada, precisa ser aprimorada, mas funciona.</p>

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</pre></td><td class="code"><pre class="php" style="font-family:monospace;"><span style="color: #009933; font-style: italic;">/**
* Class humanized captcha (hc)
* captcha making sense in forms
*
*/</span>
<span style="color: #990000;">session_start</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
<span style="color: #000000; font-weight: bold;">class</span> hc<span style="color: #009900;">&#123;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$question</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$answer</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$options</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$options_html</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$session</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">var</span> <span style="color: #000088;">$hash_answer</span><span style="color: #339933;">;</span>
	<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">function</span> __construct<span style="color: #009900;">&#40;</span><span style="color: #000088;">$question</span> <span style="color: #339933;">=</span> <span style="color: #009900; font-weight: bold;">NULL</span><span style="color: #339933;">,</span> <span style="color: #000088;">$answer</span> <span style="color: #339933;">=</span> <span style="color: #009900; font-weight: bold;">NULL</span><span style="color: #339933;">,</span> <span style="color: #000088;">$options</span> <span style="color: #339933;">=</span> <span style="color: #009900; font-weight: bold;">NULL</span><span style="color: #009900;">&#41;</span>
	<span style="color: #009900;">&#123;</span>
		<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;humanized_captcha&quot;</span><span style="color: #339933;">;</span> <span style="color: #666666; font-style: italic;">//uniqid(md5(microtime()), true);</span>
		<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">answer</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$answer</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$options</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">question</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$question</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;hc&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;question&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$question</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;answer&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$answer</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;options&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$options</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;hash&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #990000;">uniqid</span><span style="color: #009900;">&#40;</span><span style="color: #990000;">md5</span><span style="color: #009900;">&#40;</span><span style="color: #990000;">microtime</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
		<span style="color: #990000;">print_r</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #009900;">&#125;</span>
	<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">function</span> show<span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span>
	<span style="color: #009900;">&#123;</span>
		<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options_html</span><span style="color: #009900;">&#91;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">answer</span><span style="color: #339933;">;</span>
		<span style="color: #b1b100;">foreach</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options</span> <span style="color: #b1b100;">as</span> <span style="color: #000088;">$opt</span><span style="color: #009900;">&#41;</span>
		<span style="color: #009900;">&#123;</span>
			<span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options_html</span><span style="color: #009900;">&#91;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #000088;">$opt</span><span style="color: #339933;">;</span>
		<span style="color: #009900;">&#125;</span>
		<span style="color: #990000;">shuffle</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options_html</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
		<span style="color: #990000;">print_r</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options_html</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
		<span style="color: #000088;">$html</span><span style="color: #009900;">&#91;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;&lt;span id=<span style="color: #000099; font-weight: bold;">\&quot;</span>captcha_question<span style="color: #000099; font-weight: bold;">\&quot;</span>&gt;&quot;</span> <span style="color: #339933;">.</span> 
                  <span style="color: #990000;">htmlentities</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">question</span><span style="color: #009900;">&#41;</span> <span style="color: #339933;">.</span> 
                  <span style="color: #0000ff;">&quot;&lt;/span&gt;<span style="color: #000099; font-weight: bold;">\n</span>&lt;div id=<span style="color: #000099; font-weight: bold;">\&quot;</span>captcha_answers<span style="color: #000099; font-weight: bold;">\&quot;</span>&gt;<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span><span style="color: #339933;">;</span>
		<span style="color: #b1b100;">foreach</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">options_html</span> <span style="color: #b1b100;">as</span> <span style="color: #000088;">$ans</span><span style="color: #009900;">&#41;</span>
		<span style="color: #009900;">&#123;</span>	<span style="color: #666666; font-style: italic;">// (($ans == $this-&gt;answer)? ($_SESSION[$this-&gt;session][&quot;hash&quot;])</span>
			<span style="color: #666666; font-style: italic;">// (uniqid(md5(microtime()), true))</span>
			<span style="color: #000088;">$html</span><span style="color: #009900;">&#91;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;&lt;span class=<span style="color: #000099; font-weight: bold;">\&quot;</span>captcha_option<span style="color: #000099; font-weight: bold;">\&quot;</span>&gt;&lt;label&gt;
            &lt;input type=<span style="color: #000099; font-weight: bold;">\&quot;</span>radio<span style="color: #000099; font-weight: bold;">\&quot;</span> name=<span style="color: #000099; font-weight: bold;">\&quot;</span>captcha_option<span style="color: #000099; font-weight: bold;">\&quot;</span> value=<span style="color: #000099; font-weight: bold;">\&quot;</span>&quot;</span> <span style="color: #339933;">.</span> 
            <span style="color: #009900;">&#40;</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$ans</span> <span style="color: #339933;">==</span> <span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">answer</span><span style="color: #009900;">&#41;</span>? <span style="color: #009900;">&#40;</span><span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;hash&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span> <span style="color: #339933;">:</span> 
            <span style="color: #009900;">&#40;</span><span style="color: #990000;">uniqid</span><span style="color: #009900;">&#40;</span><span style="color: #990000;">md5</span><span style="color: #009900;">&#40;</span><span style="color: #990000;">microtime</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span> <span style="color: #009900;">&#41;</span> <span style="color: #339933;">.</span> <span style="color: #0000ff;">&quot;<span style="color: #000099; font-weight: bold;">\&quot;</span> /&gt;&quot;</span> <span style="color: #339933;">.</span> 
            <span style="color: #990000;">htmlentities</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$ans</span><span style="color: #009900;">&#41;</span> <span style="color: #339933;">.</span> <span style="color: #0000ff;">&quot;&lt;/label&gt;&lt;/span&gt;<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span><span style="color: #339933;">;</span>
		<span style="color: #009900;">&#125;</span>
		<span style="color: #000088;">$html</span><span style="color: #009900;">&#91;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;&lt;/div&gt;&quot;</span><span style="color: #339933;">;</span>
		<span style="color: #b1b100;">return</span> <span style="color: #990000;">implode</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;&quot;</span><span style="color: #339933;">,</span> <span style="color: #000088;">$html</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #009900;">&#125;</span>
	<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">function</span> validate<span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span>
	<span style="color: #009900;">&#123;</span>
        <span style="color: #000088;">$return</span> <span style="color: #339933;">=</span> <span style="color: #990000;">empty</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;captcha_option&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span>? 
                  <span style="color: #000088;">$_POST</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;captcha_option&quot;</span><span style="color: #009900;">&#93;</span> <span style="color: #339933;">:</span> <span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;captcha_option&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #339933;">;</span>
        <span style="color: #b1b100;">if</span> <span style="color: #009900;">&#40;</span><span style="color: #000088;">$return</span> <span style="color: #339933;">!=</span> <span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;humanized_captcha&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;hash&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span>
        <span style="color: #009900;">&#123;</span>
            <span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">&quot;Invalid code&quot;</span><span style="color: #339933;">;</span>
        <span style="color: #009900;">&#125;</span>
        <span style="color: #b1b100;">else</span>
        <span style="color: #009900;">&#123;</span>
            <span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">&quot;Valid code&quot;</span><span style="color: #339933;">;</span>
        <span style="color: #009900;">&#125;</span>
	<span style="color: #009900;">&#125;</span>
	<span style="color: #000000; font-weight: bold;">public</span> <span style="color: #000000; font-weight: bold;">function</span> __destroy<span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span>
	<span style="color: #009900;">&#123;</span>
		<span style="color: #990000;">unset</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_SESSION</span><span style="color: #009900;">&#91;</span><span style="color: #000088;">$this</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">session</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #009900;">&#125;</span>
&nbsp;
<span style="color: #009900;">&#125;</span></pre></td></tr></table></div>

<p>Você deve usar essa classe dessa forma:</p>

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</pre></td><td class="code"><pre class="php" style="font-family:monospace;">include_once(&quot;captcha.class.php&quot;);
&lt;style&gt;
#captcha_question, #captcha_question, .captcha_option
{
	display: block;
}
&lt;/style&gt;
&lt;form action = &quot;form01.php&quot; method=&quot;post&quot;&gt;
<span style="color: #000000; font-weight: bold;">&lt;?php</span>
<span style="color: #b1b100;">if</span><span style="color: #009900;">&#40;</span><span style="color: #339933;">!</span><span style="color: #990000;">isset</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;captcha_option&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span> <span style="color: #339933;">&amp;</span> <span style="color: #339933;">!</span><span style="color: #990000;">isset</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_POST</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;captcha_option&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
	<span style="color: #000088;">$hc</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> hc<span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;Qual o nome do mamífero&quot;</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">&quot;hipopótamo&quot;</span><span style="color: #339933;">,</span> <span style="color: #990000;">array</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;vermelho&quot;</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">&quot;cômodo&quot;</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">&quot;vértebra&quot;</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">&quot;educação&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #b1b100;">echo</span> <span style="color: #000088;">$hc</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">show</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
<span style="color: #009900;">&#125;</span> <span style="color: #b1b100;">else</span> <span style="color: #009900;">&#123;</span>
	hc<span style="color: #339933;">::</span><span style="color: #004000;">validate</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
<span style="color: #009900;">&#125;</span>
<span style="color: #000000; font-weight: bold;">?&gt;</span>
&lt;input type=&quot;submit&quot;&gt;
&lt;/form&gt;</pre></td></tr></table></div>

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