* Added ignore functionality.  With functions   LexerBuilder::setIgnoreTokens(string)/LexerBuilder::addIgnoreTokens(string)   you can add chars to a list of tokens to be ignored.  Typically this   will be space characters.  Ignored tokens will not be appended to   the Tokenlist at all.  The functions parameter is a string of all   the characters to be ignored, e.g. " \t" for spaces and tabulators.
* Added ignore functionality.  With functions
  LexerBuilder::setIgnoreTokens(string)/LexerBuilder::addIgnoreTokens(string)
  you can add chars to a list of tokens to be ignored.  Typically this
  will be space characters.  Ignored tokens will not be appended to
  the Tokenlist at all.  The functions parameter is a string of all
  the characters to be ignored, e.g. " \t" for spaces and tabulators.

oliverheins/PHPSimpleLexYacc