如何替换特殊字符包围的单词？

I want to remove words which are surrounded by special characters using preg_replace():

$product_name =  'Choose a   : giFt ,';
$word = 'gift';
$regex = '/[-:,]?\b'.$word.'\b[-:,]?/i';
if(preg_match($regex, $product_name))
{
  $str = preg_replace($regex, "", trim($product_name));
}
echo $str;

output:

Choose a  :  ,

It works fine if there is no space means if my string is "Choose a :giFt,".

My expected output is

Choose a

You must try this :

$regex = '`:([^>]+),`';

But you must clean your code too, you don't need $regex and $regex_p

Just add spaces in your character class:

$regex = '/[-:,\s]*\b'.$word.'\b[-:,\s]*/i';