PHP generates image verification code and click switching code

This article mainly introduces the example of PHP generating image verification code, and also introduces the method to achieve the effect of clicking to switch (can't see clearly? Change one). Friends in need can refer to it

Here to take a look Effect:

Now let us take a look at the PHP code

Then just call it in the page:

If you want to achieve "cannot see Clear? Change one" effect, add the following JS to the page

function changing(){ document.getElementById('checkpic').src="/images/checkcode.php?"+Math.random(); }

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