Trying to count # of characters in a text input of a form

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February 20th, 2003, 05:59 PM

CHornJr

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Trying to count # of characters in a text input of a form

I have a form and I am creating my error checker and I want to make sure that the number of characters in the field isn't >14. I thought the count() would work, but it didn't

since it only works for arrays which I didn't know till after I read the count portion on the manual at PHP.net. So have can I count the number of characters in a string variable with php?

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February 20th, 2003, 06:37 PM

jpenn

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Quote:

I have a form and I am creating my error checker and I want to make sure that the number of characters in the field isn't >14

PHP Code:


		
			
if ( strlen( $_POST['field'] ) > 14 ) echo 'To many characters!';

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February 20th, 2003, 07:36 PM

Ben Rowe

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while where on the topic of checking you may want to javascript check it as well, so that they do not have to load a page to tell them that they have done something wrong.

you could use the following javascript to check the form when it is submitted

PHP Code:


		
			
<script>



function CheckForm()

{



var frm = document.form_name;



if(field.value.length > 14)

{



alert('your field length must be a maximum of 14 characters');

field.focus();



return false



}



//more checking here



return true



}

then in your form tag add this

onSubmit="return CheckForm();"

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