How to solve the problem of php verification code unchanged

This article mainly introduces "how to solve the problem of php Captcha unchanged," in daily operation, I believe many people have doubts on how to solve the problem of php Captcha unchanged, Xiaobian consulted all kinds of information, sorted out simple and easy to use operation methods, hope to answer "how to solve the problem of php Captcha unchanged" doubts helpful! Next, please follow the small series to learn together!

php Captcha unchanged solution: 1, use "_javascript:ckimg();" method to replace a Captcha;2, by "o nclick="this.src ='... "Method implementation Click to change pictures.

Operating environment: Windows 7 system, PHP 7.1 version, DELL G3 computer

php Captcha unchanged how to do?

php Captcha no refresh change (replacement)

test.php

function ckimg(){ document.getElementById('img').src="validateCode2.php? "+new Date().getTime(); }

I can't see it clearly. Please change it.

The class that produces Captcha, containing some parameters for Captcha generation, such as size, color, symbol type for displaying Captcha

validateCode2.php

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