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validate user input before submit

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Mar 26.2012

Hello,

I am trying to validate and input field for userid. I want the field to be validate after the user leave the field and Before submitting it.

so basically, I want to grap the user input and do a sql select to see if the userid is already exist.

is there any way for doing this w/o using ajax?
or is there a way that after the form is submit, I can redirect the user back to the same page with all the data still there?

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PHP

1 Comments(s) ↴

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@WolfShadeMar 26.2012 — AJaX would be your best bet. But, yes, if you use session variables you can redirect back to the page and throw an alert. But I think you need to use output buffering, unless you use a META tag for the redirect - header() will not work without output buffering.
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