Sanitize sentence in php - php

Question

The title may sound odd, but im kind of trying to set up this preg_replace that takes care of messy writers for a textarea. It has to:
if there is an exclamation sign, there should not be another one in a row.
if there is a ., the comma wins and it has to be ,
when there is one+ spaces before a coma, it should be reduced to nothing.
the sentence cannot start or end with a comma.
there should never be more than 2 of the same letters joined together.
a space must be always present after a comma.
E.g.:
,My house, which is green., is nice!
My house..., which is green, is nice!!!
My house ,which is green,,, is nice!!
The end result should always be:
My house, which is green, is nice!
Is there an already built regex that takes care of this?
Solution check out FakeRainBrigand's solution below!

Answer 1

I might have to use this for my own sites... nice idea!
<?php
$text = 'My hooouse..., which is greeeeeen , is nice!!! ,And pretty too...';
$pats = array(
'/([.!?]\s{2}),/', # Abc. ,Def
'/\.+(,)/', # ......,
'/(!)!+/', # abc!!!!!!!!
'/\s+(,)/', # abc , def
'/([a-zA-Z])\1\1/', # greeeeeeen
'/,(?!\s)/');
$fixed = preg_replace($pats, '$1', $text);
echo $fixed;
echo "\n\n";
?>
And the 'modified' version of $text: "My house, which is green, is nice! And pretty too."
UPDATE: Here's the version that handles "abc,def" -> "abc, def".
<?php
$text = 'My hooouse..., which is greeeeeen ,is nice!!! ,And pretty too...';
$pats = array(
'/([.!?]\s{2}),/', # Abc. ,Def
'/\.+(,)/', # ......,
'/(!)!+/', # abc!!!!!!!!
'/\s+(,)/', # abc , def
'/([a-zA-Z])\1\1/'); # greeeeeeen
$fixed = preg_replace($pats, '$1', $text);
$really_fixed = preg_replace('/,(?!\s)/', ', ', $fixed);
echo $really_fixed;
echo "\n\n";
?>
I would think this is a bit slower since it's an additional function call.

Answer 2

- $result = preg_replace('/!+/', '!', $subject);
- $result = preg_replace('/\.*,/', ',', $subject);
- $result = preg_replace('/\s+(?=,)/', '', $subject);
- $result = preg_replace('/^,*|,*$/', '', $subject);
- $result = preg_replace('/([a-z])\1+/i', '$1$1', $subject);
- $result = preg_replace('/,(?!\s)/', ', ', $subject);
One by one matching to your rules :)