


Learn about encapsulating verification codes in PHP in one minute (Part 2)
PHP中我们了解了那么多关于php的知识,不知道你们对封装验证码有多少了解,我相信很大一部分人会不知道这部分知识点,那么不急本篇文章就是带领大家更深刻的去了解这个内容。
相关推荐:一分钟学会PHP中关于封装验证码(上)
关于封装验证码下:
首先我们先新建一个文件,然后写上他们的条件,宽,高,字母,数字,字母数字混合,干扰点,背景色,字体颜色等;紧接着我们定义一个函数,然后,我们开始准备画布,生成颜色,以及我们所需要的什么样的字符,干扰点和准备输出的类型,准备输出的图片到最后的销毁;
具体代码如下:
//4开始写字
for($i=0;$i<$num;$i++){ $x =floor ($width / $num) *$i; $y= mt_rand(10 ,$height - 20) ; imagechar($image,5,$x ,$y,$string[$i] ,deepColor ()) ; }
//5干扰线(点)
for ($i = 0; $i<$num ; $i++) ( imagearc ($image,mt_rand(10 ,$width) ,mt_rand(10 ,$height) ,mt_rand(10 ,$width) , mt_rand(10,$height) ,mt_rand(0,10),mt_rand(0,270) ,deepColor($image)); } for ($1 =0; $i<50 ; $1++){ imagesetpixel ($image,mt_rand(O,$width) ,mt_rand(0 ,$height) ,deepColor ($image)) ; }
//6指定输出的类型
header ('Content - type : image/png' ) ;
//7准备输出图片
imagepng ($image) ;
//8 销毁
imagedestroy ($image) ; return $string; }
根据以上我们代码演示,我们需要去建立他们的规格,颜色以及我们所需要的字符样式等等;
相关学习视频分享:php视频教程
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