Heim php教程 php手册 php编写生成酷炫验证码 - 六月天空的芬芳

php编写生成酷炫验证码 - 六月天空的芬芳

May 20, 2016 am 11:39 AM

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #800080;">$im</span>=imagecreate(200,100<span style="color: #000000;">);//生成画布
</span><span style="color: #008080;"> 3</span> imagecolorallocate(<span style="color: #800080;">$im</span>,0,0,0<span style="color: #000000;">);//背景色
</span><span style="color: #008080;"> 4</span> <span style="color: #800080;">$white</span>=imagecolorallocate(<span style="color: #800080;">$im</span>,<span style="color: #008080;">rand</span>(0,255),<span style="color: #008080;">rand</span>(0,255),<span style="color: #008080;">rand</span>(0,255<span style="color: #000000;">));//生成随机颜色
</span><span style="color: #008080;"> 5</span> <span style="color: #0000ff;">for</span>(<span style="color: #800080;">$i</span>=0;<span style="color: #800080;">$i</span>$i++<span style="color: #000000;">)
</span><span style="color: #008080;"> 6</span> <span style="color: #000000;">{
</span><span style="color: #008080;"> 7</span>     imageline(<span style="color: #800080;">$im</span>,<span style="color: #008080;">rand</span>(0,200),<span style="color: #008080;">rand</span>(0,100),<span style="color: #008080;">rand</span>(0,200),<span style="color: #008080;">rand</span>(0,100),<span style="color: #800080;">$white</span><span style="color: #000000;">);//生成干扰线条元素
</span><span style="color: #008080;"> 8</span> <span style="color: #000000;">}
</span><span style="color: #008080;"> 9</span> <span style="color: #0000ff;">for</span>(<span style="color: #800080;">$i</span>=0;<span style="color: #800080;">$i</span>$i++<span style="color: #000000;">)
</span><span style="color: #008080;">10</span> <span style="color: #000000;">{
</span><span style="color: #008080;">11</span>     imagesetpixel(<span style="color: #800080;">$im</span>,<span style="color: #008080;">rand</span>(0,200),<span style="color: #008080;">rand</span>(0,100),<span style="color: #800080;">$white</span><span style="color: #000000;">);//生成干扰点元素
</span><span style="color: #008080;">12</span> <span style="color: #000000;">}
</span><span style="color: #008080;">13</span> <span style="color: #0000ff;">for</span>(<span style="color: #800080;">$i</span>=0,<span style="color: #800080;">$str</span>='';<span style="color: #800080;">$i</span>$i++<span style="color: #000000;">)//通过循环获得四个字符
</span><span style="color: #008080;">14</span> <span style="color: #000000;">{
</span><span style="color: #008080;">15</span>     <span style="color: #0000ff;">switch</span>(<span style="color: #008080;">rand</span>(1,3<span style="color: #000000;">))
</span><span style="color: #008080;">16</span> <span style="color: #000000;">    {
</span><span style="color: #008080;">17</span>         <span style="color: #0000ff;">case</span>'1':
<span style="color: #008080;">18</span>         <span style="color: #800080;">$ch</span>=<span style="color: #008080;">rand</span>(0,9<span style="color: #000000;">);
</span><span style="color: #008080;">19</span>         <span style="color: #0000ff;">break</span><span style="color: #000000;">; 
</span><span style="color: #008080;">20</span>         <span style="color: #0000ff;">case</span>'2':
<span style="color: #008080;">21</span>         <span style="color: #800080;">$ch</span>=<span style="color: #008080;">sprintf</span>('%c',<span style="color: #008080;">rand</span>(97,122<span style="color: #000000;">));
</span><span style="color: #008080;">22</span>         <span style="color: #0000ff;">break</span><span style="color: #000000;">;
</span><span style="color: #008080;">23</span>         <span style="color: #0000ff;">case</span>'3':
<span style="color: #008080;">24</span>         <span style="color: #800080;">$ch</span>=<span style="color: #008080;">sprintf</span>('%c',<span style="color: #008080;">rand</span>(65,90<span style="color: #000000;">));
</span><span style="color: #008080;">25</span>         <span style="color: #0000ff;">break</span><span style="color: #000000;">;
</span><span style="color: #008080;">26</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">27</span>         <span style="color: #800080;">$str</span>.=<span style="color: #800080;">$ch</span><span style="color: #000000;">;
</span><span style="color: #008080;">28</span> 
<span style="color: #008080;">29</span> <span style="color: #000000;">}
</span><span style="color: #008080;">30</span> imagettftext(<span style="color: #800080;">$im</span>,32,<span style="color: #008080;">rand</span>(0,15),55,70,<span style="color: #800080;">$white</span>,'c.ttc',<span style="color: #800080;">$str</span><span style="color: #000000;">);//在画布上输出字符串
</span><span style="color: #008080;">31</span> <span style="color: #008080;">header</span>("Content-type:image/jpeg"<span style="color: #000000;">);
</span><span style="color: #008080;">32</span> imagejpeg(<span style="color: #800080;">$im</span><span style="color: #000000;">);
</span><span style="color: #008080;">33</span> imagedestroy(<span style="color: #800080;">$im</span><span style="color: #000000;">);
</span><span style="color: #008080;">34</span> ?>
Nach dem Login kopieren

 

Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn

Heiße KI -Werkzeuge

Undresser.AI Undress

Undresser.AI Undress

KI-gestützte App zum Erstellen realistischer Aktfotos

AI Clothes Remover

AI Clothes Remover

Online-KI-Tool zum Entfernen von Kleidung aus Fotos.

Undress AI Tool

Undress AI Tool

Ausziehbilder kostenlos

Clothoff.io

Clothoff.io

KI-Kleiderentferner

AI Hentai Generator

AI Hentai Generator

Erstellen Sie kostenlos Ai Hentai.

Heiße Werkzeuge

Notepad++7.3.1

Notepad++7.3.1

Einfach zu bedienender und kostenloser Code-Editor

SublimeText3 chinesische Version

SublimeText3 chinesische Version

Chinesische Version, sehr einfach zu bedienen

Senden Sie Studio 13.0.1

Senden Sie Studio 13.0.1

Leistungsstarke integrierte PHP-Entwicklungsumgebung

Dreamweaver CS6

Dreamweaver CS6

Visuelle Webentwicklungstools

SublimeText3 Mac-Version

SublimeText3 Mac-Version

Codebearbeitungssoftware auf Gottesniveau (SublimeText3)