Remove extra spaces but not space between two words

Question

I want to remove extra spaces present in my string. I have tried trim,ltrim,rtrim and others but non of them are working and even trie

Answer 1

OK, so you want to trim all whitespace from the end of the string and excess whitespace between words.

You can do this with a single regex:

$result = preg_replace('/^\s+|\s+$|\s+(?=\s)/', '', $subject);

Explanation:

^\s+      # Match whitespace at the start of the string
|         # or
\s+$      # Match whitespace at the end of the string
|         # or
\s+(?=\s) # Match whitespace if followed by another whitespace character

Like this (example in Python because I don't use PHP):

>>> re.sub(r"^\s+|\s+$|\s+(?=\s)", "", "  Hello\n   and  welcome to  India   ")
'Hello and welcome to India'