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HomeBackend DevelopmentPHP ProblemHow to solve the problem that the php linux verification code does not display

php linux验证码不显示的解决办法:首先定义验证码中要用到的颜色;然后通过“imagefilledrectangle”等函数画出背景边框等;接着画验证码;最后在linux中把对应的字体放到上级目录中即可。

How to solve the problem that the php linux verification code does not display

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php 验证码linux下只显示画布,不显示验证码的终极解决方法

经测试通过,首先放出我的代码

<?php
session_start();
/**去掉boom就是utf-8
* vCode(m,n,x,y) m个数字 显示大小为n 边宽x 边高y
* http://blog.qita.in
* 自己改写记录session $code
*/
 
vCode(4, 12); //4个数字,显示大小为15
 
function vCode($num = 4, $size = 20, $width = 0, $height = 0) {
!$width && $width = $num * $size * 4 / 5 + 5;
!$height && $height = $size + 10;
// 去掉了 0 1 O l 等
$str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
$code = &#39;&#39;;
for ($i = 0; $i < $num; $i++) {
$code .= $str[mt_rand(0, strlen($str)-1)];
}
// 画图像
$im = imagecreatetruecolor($width, $height);
// 定义要用到的颜色
$back_color = imagecolorallocate($im, 235, 236, 237);
$boer_color = imagecolorallocate($im, 118, 151, 199);
$text_color = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
// 画背景
imagefilledrectangle($im, 0, 0, $width, $height, $back_color);
// 画边框
imagerectangle($im, 0, 0, $width-1, $height-1, $boer_color);
// 画干扰线
for($i = 0;$i < 5;$i++) {
$font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagearc($im, mt_rand(- $width, $width), mt_rand(- $height, $height), mt_rand(30, $width * 2), mt_rand(20, $height * 2), mt_rand(0, 360), mt_rand(0, 360), $font_color);
}
// 画干扰点
for($i = 0;$i < 50;$i++) {
$font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $font_color);
}
// 画验证码 http://www.ruoshuiyx.com 转载请保留出处谢谢,不会影响您的代码执行速度如不会请资讯若水印象网络站长
//@imagefttext($im, $size , 0, 5, $size + 3, $text_color, &#39;c:\\WINDOWS\\Fonts\\simsun.ttc&#39;, $code);
//上边的是windows下试用的下边是LINUX系统下试用的,需要对应把字体上传上去
@imagefttext($im, $size , 0, 5, $size + 3, $text_color, &#39;../msyh.ttf&#39;, $code);
$_SESSION["VerifyCode"]=strtolower($code); //转换成小写
header("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");
header("Content-type: image/png;charset=utf-8");
imagepng($im);
imagedestroy($im);
} 
 
?>

复制下载后注意41和43行,如果服务器是windows那么请把43行注释掉,保留41行,linux则反过来

linux下注意下要把对应的字体放到上级目录里,如我用的是微软雅黑。别的方法俺也不会反正最终是显示出来了。赶快试试吧

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