When you let users input text in a textfield or input box it is always a good idea to use trim function to remove spaces form the beginning or the end of the string.
Today I needed a function to trim spaces from the middle of a string and replace with a single space.
/* this will return the string where groups of consecutive spaces are collapsed in a single space eg. $str = "This is my test string"; function will output "This is my test string" */ function centerTrim($str){ return preg_replace("/\s+/", " ", $str) }