Validating a form in php wow updating failed

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While Validating an HTML form the client side validation is not only enough.Since our web application allows outsiders to enter data, server-side form validation is also required for additional security.If you do want to add this feature to your own sites, using the PEAR Text_CAPTCHA package would be the easiest route.Otherwise, you could generate the images yourself using the GD library.

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We have already explain about form validation using javascript and j Query, but this time we will show you how to validate your form using PHP.In order to successfully complete the form, the text from the image has to be typed into a box.This is something a human user could do but a bot could not.In doing so, I'll make use of a couple of Character Type functions, added to PHP in version 4.3.Listed in Table 4.1, these functions test a given value against certain constraints for the current locale (established by the an acronym! A captcha test displays an image with a word or some letters written in it, normally in a nonlinear fashion.

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