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增加背景图片透明度设置 #62

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增加背景图片透明度设置 #62

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bb3f455
增加背景图片透明度设置
ZayneSW May 27, 2021
9d02737
Merge branch 'top-think:3.0' into 3.0
ZayneSW Feb 10, 2022
34ace97
Merge branch 'top-think:3.0' into 3.0
ZayneSW Mar 23, 2022
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4 changes: 3 additions & 1 deletion src/Captcha.php
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,8 @@ class Captcha
protected $bg = [243, 251, 254];
//算术验证码
protected $math = false;
//从 0 到 127。0 表示完全不透明，127 表示完全透明。
protected $alpha = 0;

/**
* 架构方法 设置参数
Expand Down Expand Up @@ -180,7 +182,7 @@ public function create(string $config = null, bool $api = false): Response
// 建立一幅 $this->imageW x $this->imageH 的图像
$this->im = imagecreate((int) $this->imageW, (int) $this->imageH);
// 设置背景
imagecolorallocate($this->im, $this->bg[0], $this->bg[1], $this->bg[2]);
imagecolorallocatealpha($this->im, $this->bg[0], $this->bg[1], $this->bg[2], $this->alpha);

// 验证码字体随机颜色
$this->color = imagecolorallocate($this->im, mt_rand(1, 150), mt_rand(1, 150), mt_rand(1, 150));
Expand Down