ホームページ >バックエンド開発 >PHPチュートリアル >PHPグラフィック検証コードの具体的な実装方法_PHPチュートリアル
PHPグラフィック検証コードの具体的な実装方法_PHPチュートリアル
- WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBオリジナル
- 2016-07-15 13:28:36781ブラウズ
Web サイトの登録などで認証コードの入力を要求する支払いリクエストがよく見られます。これは、ユーザーの目の前にランダムな数字や記号を写真の形で表示し、関連する機能を使用する前に認証を提供します。今日は紹介します具体的な実装コードは以下の通りです
<ol class="dp-xml">
<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span> </span></span></li>
<li class=""><span> </span></li>
<li class="alt"><span>class rndnum{ </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>function rnd(){ </span></li>
<li class=""><span>srand((double)microtime()*1000000); </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">rnd_number</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">array</font></span><span>( </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">1</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'1', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">2</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'2', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">3</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'3', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">4</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'4', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">5</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'5', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">6</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'6', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">7</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'7', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">8</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'8', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">9</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'9', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">10</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'a', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">11</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'b', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">12</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'c', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">13</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'d', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">14</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'e', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">15</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'f', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">16</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'g', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">17</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'h', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">18</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'i', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">19</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'j', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">20</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'k', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">21</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'l', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">22</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'m', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">23</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'n', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">24</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'o', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">25</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'p', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">26</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'q', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">27</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'r', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">28</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'s', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">29</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'t', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">30</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'u', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">31</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'v', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">32</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'w', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">33</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'x', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">34</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'y', </span>
</li>
<li class="">
<span></span><span class="attribute"><font color="#ff0000">35</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'z', </span>
</li>
<li class="alt">
<span></span><span class="attribute"><font color="#ff0000">36</font></span><span>=</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>'0' </span>
</li>
<li class=""><span>); </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">result</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">array_rand</font></span><span>($rnd_number,6); </span>
</li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">j</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">count</font></span><span>($result); </span>
</li>
<li class="alt">
<span>for ($</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;$i</span><span class="tag"><strong><font color="#006699"><</FONT></STRONG></SPAN><SPAN>$j;$i++) { </SPAN></SPAN><LI class=""><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>re.</FONT></SPAN><SPAN>=$rnd_number[$result[$i]]; </SPAN></SPAN><LI class=alt><SPAN>} </SPAN><LI class=""><SPAN>//$</SPAN><SPAN class=attribute><FONT color=#ff0000>re</FONT></SPAN><SPAN>=$rnd_number[$result[1]].$rnd_number[$result[2]].$rnd_number[$result[3]].$rnd_number[$result[4]].$rnd_number[$result[5]].$rnd_number[$result[6]].$rnd_number[$result[7]]; </SPAN></SPAN><LI class=alt><SPAN>//return array_keys($result); </SPAN><LI class=""><SPAN>return $re; </SPAN><LI class=alt><SPAN>} </SPAN><LI class=""><SPAN>} </SPAN><LI class=alt><SPAN>/*用法 </SPAN><LI class=""><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>rndnum</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>new</FONT></SPAN><SPAN> rndnum(); </SPAN></SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>num</FONT></SPAN><SPAN>=$rndnum-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></font></strong></span><span>rnd(); </span>
</li>
<li class=""><span>echo $num; </span></li>
<li class="alt"><span>*/ </span></li>
<li class="">
<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span> </span>
</li>
</ol> PHP グラフィックを生成する確認コード 画像、乱数を入力してください:
<ol class="dp-xml">
<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span> </span></span></li>
<li class=""><span> </span></li>
<li class="alt"><span>Header("Content-type: image/PNG"); </span></li>
<li class=""><span>require_once("rndnum.php"); </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">rndnum</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">new</font></span><span> rndnum(); </span>
</li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">authnum</font></span><span>=$rndnum-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>rnd(); </span>
</li>
<li class="alt"><span>session_start(); </span></li>
<li class=""><span>$_SESSION["extrra_code"]=$authnum; </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">im</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">imagecreate</font></span><span>(72,20); </span>
</li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">black</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">ImageColorAllocate</font></span><span>($im, 0,0,0); </span>
</li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">white</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">ImageColorAllocate</font></span><span>($im, 255,255,255); </span>
</li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">gray</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">ImageColorAllocate</font></span><span>($im, 200,200,200); </span>
</li>
<li class="alt"><span>imagefill($im,0,0,$gray); </span></li>
<li class=""><span>imagestring($im,5,10,3,$authnum,$black); </span></li>
<li class="alt">
<span>for($</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;$i</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>200</SPAN></FONT></STRONG><SPAN>;$i++) //加入干扰象素 </SPAN></SPAN><LI class=""><SPAN>{ </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>randcolor</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>ImageColorallocate</FONT></SPAN><SPAN>($im,rand(0,255),rand(0,255),rand(0,255)); </SPAN></SPAN><LI class=""><SPAN> imagesetpixel($im, rand()%70 , rand()%30 , $randcolor); </SPAN><LI class=alt><SPAN>} </SPAN><LI class=""><SPAN>ImagePNG($im); </SPAN><LI class=alt><SPAN>ImageDestroy($im); </SPAN><LI class=""><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></span></font></strong><span> </span>
</li>
</ol>上記はすべてのPHPの実装コードですグラフィック確認コード、お役に立てば幸いです。
。
声明：
この記事の内容はネチズンが自主的に寄稿したものであり、著作権は原著者に帰属します。このサイトは、それに相当する法的責任を負いません。盗作または侵害の疑いのあるコンテンツを見つけた場合は、admin@php.cn までご連絡ください。