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To be specific, I want to make code like Yahoo’s Registration (Yahoo ID – Check Availability) checking the availability. The problem here is I need to use PHP to connect, get, and search/verify if the entered value in the textbox is unique.
I tried passing a JavaScript value to a PHP variable, but based on my research, doing this isn’t possible, so I need another possible solution to get the value of the textbox and set it to a PHP variable.
Thank you in advance.
The only way to get data from JavaScript to PHP (in a typical environment) is to deliver it over HTTP. Doing this without leaving the page is known as Ajax, and usually done using XMLHttpRequest.
There are no shortage of tutorials describing how to do this, nor any shortage of libraries that will help (plus, of course, all the large libraries such as YUI and jQuery).