bab-icon/config/captcha.php

<?php

return [
    //> 默认验证码筛选字符
    'characters' => '2346789abcdefghjmnpqrtuxyzABCDEFGHJMNPQRTUXYZ',

    'captcha' => [
        'length'    => 4,
        'width'     => 140,
        'height'    => 36,
        'quality'   => 90,
        'lines'     => 6,
        'bgImage'   => true,
        'sensitive' => false,
        'fontColors'=> ['#2c3e50', '#c0392b', '#16a085', '#c0392b', '#8e44ad', '#303f9f', '#f57c00', '#795548'],
        'angle'     => 30,
        'sharpen'   => 10,
        'blur'      => 2,
        'invert'    => false,
        'contrast'  => -5,
    ],

    //> 验证码默认配置
    'default'   => [
        'length'    => 5,
        'width'     => 120,
        'height'    => 36,
        'quality'   => 90,
    ],

    'flat'   => [
        'length'    => 6,   //> 验证码字符数量
        'width'     => 160, //> 验证码图片宽度
        'height'    => 46,  //> 验证码图片高度
        'quality'   => 90,  //> 验证码图片质量
        'lines'     => 6,   //> 验证码图片上线条数量
        //> 验证码图片背景图片 是否开启
        'bgImage'   => false,
        //> 验证码背景颜色(和bgImage选择其中一个)
        'bgColor'   => '#ecf2f4',
        //> 验证码字符颜色(随机选择其中颜色)
        'fontColors'=> ['#2c3e50', '#c0392b', '#16a085', '#c0392b', '#8e44ad', '#303f9f', '#f57c00', '#795548'],
        'contrast'  => -5,  //> 验证码图片背景对比度
    ],

    'mini'   => [
        'length'    => 3,
        'width'     => 60,
        'height'    => 32,
    ],

    'inverse'   => [
        'length'    => 5,
        'width'     => 120,
        'height'    => 36,
        'quality'   => 90,
        'sensitive' => true,//> 验证码是否区分大小写(true:开启大小写验证;false:关闭大小写验证)
        'angle'     => 12,  //> 字符的偏转角
        'sharpen'   => 10,  //> 图片锐化
        'blur'      => 2,   //> 图片模糊度
        'invert'    => true,//> JPEG 扫描方式
        'contrast'  => -5,
    ]

];