検証ページでの PHP 検証コードのアプリケーション分析_PHP チュートリアル
- WBOYオリジナル
- 2016-07-15 13:29:54995ブラウズ
ウェブサイトの場合、検証機能を提供するページが必ず必要になります。次に、検証ページでの検証コードの適用を検討する必要があります。次に詳しく説明します 1. PHP認証コードを表示・送信するページを用意します
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<span><strong><font color="#006699"><span class="tag"><?</SPAN><SPAN class=tag-name>php</SPAN></FONT></STRONG><SPAN> </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> @header("content-type:text/html; </SPAN><SPAN class=attribute><FONT color=#ff0000>charset</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>UTF</FONT></SPAN><SPAN>-8"); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> //打开session </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> session_start(); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></span></font></strong></span><span> </span>
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<span></span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>html</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>head</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>meta</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>http-equiv</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"Content-Type"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>content</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"text/html; charset=utf-8"</FONT></SPAN><SPAN> </SPAN><SPAN class=tag><STRONG><FONT color=#006699>/></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>title</SPAN><SPAN class=tag>></span></font></strong><span>PHP验证码示例</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>title</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>head</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>body</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> 验证码：</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>br</SPAN><SPAN class=tag>/></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>iframe</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>id</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"iimg"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>height</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"100"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>width</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>300</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>src</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"img.php"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>frameborder</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"0"</FONT></SPAN><SPAN> </SPAN><STRONG><FONT color=#006699><SPAN class=tag>></span><span class="tag"></</SPAN><SPAN class=tag-name>iframe</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>br</SPAN><SPAN class=tag>/></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>input</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>type</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>button</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>value</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"看不清，换一张"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>onclick</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"iimg.location.reload();"</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>br</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>form</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>action</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"validate.php"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>method</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"post"</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span> </span>
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<span> 输入验证码：</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>input</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>name</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"imgId"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>style</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"width:60"</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>input</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>type</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"submit"</FONT></SPAN><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>value</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>"确定"</FONT></SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span> </span>
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<span> </span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>form</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<li class=""><span> </span></li>
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<span> </span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>body</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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<li class=""><span> </span></li>
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<span></span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>html</SPAN><SPAN class=tag>></span></font></strong><span> </span>
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2. 以下はPHP認証コードです生成ページ、このページは最初のページで によって呼び出されます
<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 class=""><SPAN> </SPAN><LI class=alt><SPAN>Header("Content-type: image/gif"); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>session_start(); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>//验证码为随机字符，以下是算法 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$randval; </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>for($</SPAN><SPAN class=attribute><FONT color=#ff0000>i</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>0</FONT></SPAN><SPAN>;$i</SPAN><STRONG><FONT color=#006699><SPAN class=tag><</SPAN><SPAN class=tag-name>7</SPAN></FONT></STRONG><SPAN>;$i++){ </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>randstr</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>mt_rand</FONT></SPAN><SPAN>(ord('A'),ord('Z')); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> srand((double)microtime()*1000000); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>randv</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>mt_rand</FONT></SPAN><SPAN>(0,10); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> if($randv%</SPAN><SPAN class=attribute><FONT color=#ff0000>2</FONT></SPAN><SPAN>==0){ </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>randval.</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>mt_rand</FONT></SPAN><SPAN>(0,10); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> }else{ </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>randval.</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>chr</FONT></SPAN><SPAN>($randstr); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> } </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>} </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>//注册PHP验证码到session </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>session_register($randval); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>//以下是绘制验证码图 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>height</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>50</FONT></SPAN><SPAN>;//图高 </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>width</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>100</FONT></SPAN><SPAN>;//图宽 </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>im</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>ImageCreateTrueColor</FONT></SPAN><SPAN>($width, $height); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>white</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>ImageColorAllocate</FONT></SPAN><SPAN>($im, 255, 255, 255); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>blue</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>ImageColorAllocate</FONT></SPAN><SPAN>($im, 0, 0, 64); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageFill($im, 0, 0, $white); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>srand((double)microtime()*1000000000); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageLine($im, mt_rand(0,$width/3), mt_rand(0,$height/3), mt_rand($width/3,$width), mt_rand($height/3,$height), $blue); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>srand((double)microtime()*1000000); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageLine($im, mt_rand($width/3,$width), mt_rand(0,$height/3), mt_rand(0,$width/3), mt_rand(0,$height/3), $blue); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>srand((double)microtime()*1000000); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageString($im,16 , mt_rand(0,$width - strlen($randval) * 10), mt_rand(0,$height-12), $randval, $blue); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageGIF($im); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>ImageDestroy($im); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>/* </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>需要注意的是：为了支持以上绘图函数，我们必须在PHP载入GD2图形处理库，可修改 php.ini 文件中的 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>;</SPAN><SPAN class=attribute><FONT color=#ff0000>extension</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>php_gd2</FONT></SPAN><SPAN>.dll </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>为 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN></SPAN><SPAN class=attribute><FONT color=#ff0000>extension</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>php_gd2</FONT></SPAN><SPAN>.dll </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>即开启GD2库 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>*/ </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></span></font></strong></span><span> </span>
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3. これは検証ページであり、PHP 検証コードが認証に合格しました
<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> @header("content-type:text/html; </SPAN><SPAN class=attribute><FONT color=#ff0000>charset</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>UTF</FONT></SPAN><SPAN>-8"); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> //开启session </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> session_start(); </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> //得到用户输入的验证码，并转换成大写 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>imgId_req</FONT></SPAN><SPAN> = $_REQUEST['imgId']; </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> $</SPAN><SPAN class=attribute><FONT color=#ff0000>imgId_req</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>strtoupper</FONT></SPAN><SPAN>($imgId_req); </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> //验证该字符串是否注册了session变量 </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> if (session_is_registered($imgId_req)) { </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN> echo "</SPAN><STRONG><FONT color=#006699><SPAN class=tag><</SPAN><SPAN class=tag-name>font</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>color</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>blue</FONT></SPAN><SPAN> </SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong></span><span>通过验证！</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>font</SPAN><SPAN class=tag>></span></font></strong><span>"; </span>
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<li class=""><span> </span></li>
<li class="alt"><span> } else { </span></li>
<li class=""><span> </span></li>
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<span> echo "</span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>font</SPAN></FONT></STRONG><SPAN> </SPAN><SPAN class=attribute><FONT color=#ff0000>color</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>red</FONT></SPAN><SPAN> </SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong><span>验证错误！</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>font</SPAN><SPAN class=tag>></span></font></strong><span>"; </span>
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<li class=""><span> </span></li>
<li class="alt"><span> } </span></li>
<li class=""><span> </span></li>
<li class="alt"><span> //关闭session，以清除所有注册过的变量 </span></li>
<li class=""><span> </span></li>
<li class="alt"><span> session_destroy(); </span></li>
<li class=""><span> </span></li>
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<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span> </span>
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