Separate space-delimited words in a string

i have a text string in the following format $str= "word1 word2 word3 word4 "

So i want to seperate each word from the string.Two words are seperated by a blank space How do i do that. IS there any built in function to do that?

From stackoverflow

• $words = explode( ' ', $str );
  

  See: http://www.php.net/explode

• http://php.net/explode

  edit: damn, Rob was faster

• The easiest would be to use explode:

  $words = explode(' ', $str);
  

  But that does only accept fixed separators. split an preg_split do accept regular expressions so that your words can be separated by multiple spaces:

  $words = split('\s+', $str);
  // or
  $words = preg_split('/\s+/', $str);
  

  Now you can additionally remove leading and trailing spaces with trim:

  $words = preg_split('/\s+/', trim($str));