先给看下 大致的效果
那么接下来的就直接贴代码吧
<?<span>php </span><span>$image</span> = imagecreatetruecolor(100, 30); <span>//</span><span>创建画布</span><span>$imagecolor</span> = imagecolorallocate(<span>$image</span>, 255, 255, 255); <span>//</span><span>背景色</span><span> imagefill(</span><span>$image</span>, 0, 0, <span>$imagecolor</span>); <span>//</span><span>填充背景色</span><span>for</span>(<span>$i</span>=0;<span>$i</span><4;<span>$i</span>++ ){ <span>//</span><span>循环4位数</span><span>$fontsize</span> = 6<span>; </span><span>$fontcolor</span> = imagecolorallocate(<span>$image</span>, <span>rand</span>(0, 200), <span>rand</span>(0, 200), <span>rand</span>(0, 200<span>)); </span><span>$fontcontent</span> = <span>rand</span>(0, 9<span>); </span><span>$x</span> = <span>$i</span>*100/4 + <span>rand</span>(5, 15<span>); </span><span>$y</span> = <span>rand</span>(5, 10<span>); imagestring(</span><span>$image</span>, <span>$fontsize</span>, <span>$x</span>, <span>$y</span>, <span>$fontcontent</span>, <span>$fontcolor</span><span>); } <b style="color:transparent">来&源gao@dai!ma.com搞$代^码%网</b><img>搞gaodaima代码</img> </span><span>for</span>(<span>$i</span>=0;<span>$i</span><200;<span>$i</span>++ ){ <span>//</span><span>循环 添加干扰点</span><span>$pointcolor</span> = imagecolorallocate(<span>$image</span>, <span>rand</span>(50, 200), <span>rand</span>(50, 200), <span>rand</span>(50, 200<span>)); </span><span>$x</span> = <span>rand</span>(1, 99<span>); </span><span>$y</span> = <span>rand</span>(1, 29<span>); imagesetpixel(</span><span>$image</span>, <span>$x</span>, <span>$y</span>, <span>$pointcolor</span><span>); } </span><span>for</span>(<span>$i</span>=0;<span>$i</span><3;<span>$i</span>++){ <span>//</span><span>循环 添加干扰线 </span><span>$linecolor</span> = imagecolorallocate(<span>$image</span>, <span>rand</span>(100, 250), <span>rand</span>(100, 250), <span>rand</span>(100, 250<span>)); </span><span>$x1</span> = <span>rand</span>(1, 25<span>); </span><span>$x2</span> = <span>rand</span>(50, 75<span>); </span><span>$y1</span> = <span>rand</span>(1, 15<span>); </span><span>$y2</span> = <span>rand</span>(15, 25<span>); imageline(</span><span>$image</span>, <span>$x1</span>, <span>$y1</span>, <span>$x2</span>, <span>$y2</span>, <span>$linecolor</span><span>); } </span><span>header</span>("content-type:image/png"<span>); imagepng(</span><span>$image</span><span>); imagedestroy(</span><span>$image</span><span>);</span>?>
以上就介绍了php 实现验证码制作，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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转载请注明原文链接：php 实现验证码制作
