php replace multiple spaces end chrters to one code example

Example 1: php replace two spaces with one

$output = preg_replace('!\s+!', ' ', $input);

Example 2: remove double space php

$ro = preg_replace('/\s+/', ' ',$row['message']);

Example 3: php replace multiple spaces end chrters to one

$string = preg_replace('/[\s$@_*]+/', '_', $string);