validations on submit

San

hi,

i am new to php, need some help from experts. i have written a php prog file1.php , in which i have a few check boxes and a submit button. i need to chk that some 'x' no of chk boxes are checked then proceed to another page. If not ask the user to do so than click button.
can i call a php function on 'OnClick' of a button which will validate or use javascript functions ?
An early reply is appreciated very much
thans
San

Richardtagger

<input name="Submit" type="submit" onClick="<?php ?> or Javascript" value="Submit">

San

hi ,
can u pls elaborate a lil..... i am a lil new here
this is what i have....
echo "<input type='button' name='button1' onClick= ??? value='submitit'>";

can i replace ??? with a function..say
'functionToChk()'
and then in function chk the values of chkboxes...if valid redirect to another pg else just exit the function with a msg ?

pls help me out...
thax

Richardtagger

yes you can add what you want, besides, when you're doing stuff like this please at least attempt the things and if they work, Great! instead of asking before youve tried. It doesnt hurt to try you know. ok

hth

Roger_Ramjet

San, you need to understand that php is SERVER-SIDE only. If you want CLIENT-SIDE validation before submit then use JAVA.

The only way for php to validate is after you have submitted the post values. So a javascript function to check the data before you post is how it is done.

commandonz

Originally posted by Roger Ramjet
San, you need to understand that php is SERVER-SIDE only. If you want CLIENT-SIDE validation before submit then use JAVA.

The only way for php to validate is after you have submitted the post values. So a javascript function to check the data before you post is how it is done.

I just wanted to point out client side validation is done using Javascript, not Java as the first paragraph above says. Unless you're using a Java applet of course, in which case you're unlikely to be using PHP serverside.

Roger_Ramjet

Originally posted by commandonz
I just wanted to point out client side validation is done using Javascript, not Java as the first paragraph above says. Unless you're using a Java applet of course, in which case you're unlikely to be using PHP serverside.

OK! OK! Pedant! Of course I meant javascript.

commandonz

Originally posted by Roger Ramjet
OK! OK! Pedant! Of course I meant javascript.

I just wanted to point that out so as not to confuse extreme n00bs 🙂

Roger_Ramjet

Point taken, my friend.

Roger_Ramjet

San, we seem to have lost you in this thread.

To validate on submit you need something like this in your html:

<head>
<script language="javascript">

</script> </head>
<form name="use_track" action="<?=$_SERVER['PHP_SELF']?>" method="post" onSubmit="return val_track();">
<table border=0 cellspacing=0 cellpadding=5 columns=2>
<tr><td align="right"><input type="text" name="in_track" maxlength="10" size="10" /></td>
<td align="left"><input type="submit" name="go_track" value="search track no" /></td>
</tr>
</table>
</form>

The on submit action belongs to the form not the input button.

San

thankyou all, and thanks Roger Ramjet, it was very sweet of you to write it all so in detail. It was of a lot of help to me as a begginer. You guys do a great job here.

Roger_Ramjet

No trouble, just copy/paste from the page I'm working on at the moment.