Just another regex problem...

[Vettel]

I have the following string:

 

$str = +15.865s

 

I need to use preg_replace() to remove the 's' from the end of the string.  However 's' should only be removed if it is immediately preceded by a number.

 

I started with the following code, but obviously it also removed the number that comes before the 's'.

 

$new = preg_replace('/[0-9]s/', '', $str);

 

How do remove the 's' but keep the number?  Also I can't use str_replace(), just in case it's suggested.

 

Thanks.

[gizmola]

It is always faster if you can use simple string functions instead of regex.  In this case you can use substr combined with is_numeric.

 

$str = '+15.865s';
$str =  (is_numeric(substr($str, -2, 1)) && (substr($str, -1) == 's')) ? substr($str, 0, -1) : $str;
echo $str;

$str = '+15.865Rs';
$str =  (is_numeric(substr($str, -2, 1)) && (substr($str, -1) == 's')) ? substr($str, 0, -1) : $str;
echo $str;

[Vettel]

Thanks Gizmola.  Your solution certainly works, but having it in the form of a preg_replace() function would make it a lot easier for me to implement.  Do you, or anyone else, have any other ideas?

[.josh]

$new = preg_replace('/([0-9])s/', '$1', $str);

[Vettel]

Thanks Crayon Violet- just what I was looking for