Remove Excess Whitespace From Within a String

There is have two conditions :

1. If you are just dealing with excess whitespace on the beginning or end of the string you can use 

   • trim() The trim() function removes whitespace and other predefined characters from both sides of a string.

   • ltrim() Removes whitespace or other predefined characters from the left side of a string

   • rtrim() Removes whitespace or other predefined characters from the right side of a string

2. If you are dealing with extra spaces within a string consider a preg_replace of multiple whitespaces " "* with a single whitespace " ".

Example:

$foo = preg_replace('/\s+/', ' ', $foo);