vb.org Archive - Truncate Variable

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rogersnm

08-02-2006 09:13 AM

Truncate Variable

I have searched far and wide but can not find the answer xD

ok, so, how do i truncate (trim) characters off a string so it could have been x characters before but is 10 now?

Regards,
Nick.

Paul M

08-02-2006 09:28 AM

<a href="http://uk.php.net/substr" target="_blank">substr()</a>

rogersnm

08-02-2006 09:31 AM

so:

PHP Code:


		
			
substr($str, 0, 5);

will limit it to 5 characters

is there an if so if it is more than x characers then do this and do this eg:

PHP Code:


		
			
if ($str something)
{
substr($str, 0, 5);
$str = $str . "...";
}

Paul M

08-02-2006 09:36 AM

Yes (but no quotes needed around $str).

rogersnm

08-02-2006 09:44 AM

ok but what about the second bit?

Paul M

08-02-2006 09:51 AM

Second bit ?

rogersnm

08-02-2006 10:01 AM

PHP Code:


		
			
if ($str something)
{
substr($str, 0, 5);
$str = $str . "...";
}

What do i put for if ($str something) to only do that if the string is more than 5 characters long?

Guest190829

08-02-2006 10:30 AM

Quote:

Originally Posted by rogersnm

PHP Code:


		
			
if ($str something)
{
substr($str, 0, 5);
$str = $str . "...";
}

What do i put for if ($str something) to only do that if the string is more than 5 characters long?

PHP Code:


		
			
if (strlen($str) > 5)
{
   //string is greater than 5 chars
}

Also whitespace counts, so you may want to think about trimming the whitespace from the string beforehand. :)

And here is a list of all php string functions, which could come in handy:

http://us2.php.net/manual/en/ref.strings.php

rogersnm

08-02-2006 10:30 AM

thanks :)

ok so i have:

PHP Code:


		
			
if (strlen($posttitle) > 30)
{
substr($posttitle, 0, 30);
$posttitle = $posttitle . "...";
}  

if (strlen($postforumname) > 30)
{
substr($postforumname, 0, 30);
$postforumname = $postforumname . "...";
}

but the variables just show up empty

Paul M

08-02-2006 10:36 AM

You have to assign the substr to something.

$var = substr(.....)

rogersnm

08-02-2006 10:59 AM

i have, i realised the problem, i put $post[title] = $postitle rather than the other way around.

it's not actually working, my code is:

PHP Code:


		
			
$posttitle = $post['title'];
$postforumname = $post['forumname'];

if (strlen($posttitle) > 16)
{
substr($posttitle, 0, 17);
$posttitle = $posttitle . "...";

}  

if (strlen($postforumname) > 16)
{
substr($postforumname, 0, 17);
$postforumname = $postforumname . "...";
}  

$post['title'] = $posttitle;
$post['forumname'] = $postforumname;

but all it actually does is add "..." to the end of the string if it is more than 16 characters instead of cutting it to 17 and then adding it on the end.

ah i see it, i didn't put "$var = " before it.

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