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How to restrict user not to post more character

123 New Member
i have a text box i mean textarea(<texta rea></textarea>)
in my page i want to restrict user no to post more than
40 character how can i do that
Oct 9 '09 #1
4 2264
8,658 Recognized Expert Moderator Expert
for 40 characters, it’s probably easier to use a text input field (use the maxlength attribute).
Oct 9 '09 #2
1,168 Recognized Expert Top Contributor
What Dorm said, for step one. Text Area is really for larger lengths of text, while Text is for smaller (<255 ~my very flexible rule).

This can be bypassed by some less honourable people, so you should have server side checking as well. When you are processing the form, be sure to include a check using strlen().

Expand|Select|Wrap|Line Numbers
  1. if (strlen($_POST['myvar']) > 40) {
    echo "myvar too long, please keep it under 40 characters."; return;
Or something like that.
Oct 11 '09 #3
431 Recognized Expert Contributor
If it has to be done I would probably opt for the solution in javascript rather than php.

Oct 12 '09 #4
1,168 Recognized Expert Top Contributor
Agreed, but if it is important (maybe it's not) javascript can also be bypassed with ease, so PHP should be used if any databases are involved and/or it's important to have restrictions on user input.

Never trust anyone. Forms should always be thoroughly checked for nasty code that people put in. Form submissions can be faked and javascript can be turned off. Thankfully, PHP is out of the users reach so should ultimately have the serious checks in.
Oct 12 '09 #5

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