accepting only character input in text box

Question

How to validate input box for only text input using jquery and php e.g name _ must accept only text input and no special character like "aaa@ or @@@ aaaa" and alpha numeric like "aaa123"

with javascript or with php ? – safarov Apr 02 '12 at 08:50 — safarov, Apr 02 '12 at 08:50

score 0 · Answer 1 · edited May 23 '17 at 10:08

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You will want to use regular expressions I think. Take a look at this question which is pretty much the same as yours (except that it isnt about jquery) with PHP and all..

edit: Or as ComFreek points out, you can use the ctype_alnum function!

edit 2 ctype_alpha is actually what you are looking for; all alphabetic characters.

Checks if all of the characters in the provided string, text, are alphabetic. In the standard C locale letters are just [A-Za-z] and ctype_alpha() is equivalent to (ctype_upper($text) || ctype_lower($text)) if $text is just a single character, but other languages have letters that are considered neither upper nor lower case.

edited May 23 '17 at 10:08

Community

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answered Apr 02 '12 at 08:53

Bono

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I think regular expressions are a bit overkilled here, you could use [ctype_alnum](http://php.net/manual/en/function.ctype-alnum.php) – ComFreek Apr 02 '12 at 08:56
Cool-beans, didn't know about that function :) Thanks ComFreek – Bono Apr 02 '12 at 08:57
Actually, I think ctype_alpha might be better :) – Bono Apr 02 '12 at 08:59

score 0 · Answer 2 · answered Apr 02 '12 at 08:57

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Ideally you want both jquery and php validation, jquery for a better user experience and php for data integrity.

answered Apr 02 '12 at 08:57

bendataclear

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score 0 · Answer 3 · answered Apr 02 '12 at 09:20

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regarding to this, you must look into the ascii table... A-Z is representing 65-90

you just need to detect the value that return when onkeyup in html...

answered Apr 02 '12 at 09:20

Whatever Kitchen

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accepting only character input in text box

3 Answers3