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php - 验证码的实现方式？
PHP中文网
2017-04-10 15:16:37
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请教一下，有没有类似这种验证码的开源程序？
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阿神
2017-04-10 15:18:37
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搜这些关键字试试吧：
gif图片验证码
animated captcha
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搜这些关键字试试吧：
gif图片验证码
animated captcha