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creating own audio captcha in php - Stack Overflow
https://stackoverflow.com/questions/14206736/creating-own-audio-captcha-in-php
Then you only need to insert the audio-element into your html: <audio hidden id="Sound_captcha"> Your browser does not support the audio element. </audio> And Use javascript to switch to the next letter. For that, use the src-attribute of the audio and give the address of your captcha.php-file. Remember to add a value to prevent Cache:
How to Create Captcha in PHP Contact Form
https://www.positronx.io/create-captcha-in-php-contact-form/
Create PHP Captcha with GD Library. Set captcha code in the PHP session. Generate a random number with 6 characters. This will be out security code. Create a basic captcha using the GD library built-in functions. This code will generate the captcha image.
How to Create CAPTCHA Code in PHP - PHPCluster
https://www.phpcluster.com/create-captcha-code-php/
In this tutorial, we are creating CAPTCHA code using the image create function of PHP as we have discussed in our previous tutorial. CAPTCHA code is generated as a random string and stored in session. Session variable which stores random string write to an image to generate a CAPTCHA Code with an image. When the form tends to submit then checked for …
How to Generate Captcha Image in PHP ? - GeeksforGeeks
https://www.geeksforgeeks.org/how-to-generate-captcha-image-in-php/
So the main idea of creating an image-captcha is to first have a captcha.php which would start a session and generate captchas. When you can run captcha.php, you should have a small image with a captcha printed on it. Now only thing we need to do is create a test.php which uses captcha.php and validates captcha based on user’s input.
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