Parses CSS data into 3-dimensional associative arrays. Properly handles multiple declaration blocks for the same element, but will only keep the final value of a property that is declared again, which should not be a problem for most cases. Also properly handles /* style comments.
XTExpression (XTE) is the expression syntax to the XT XML-based template engine.
Inherited Variables
Inherited Methods
Class Details
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Generic parser class from which new and complex parsers can be derived.
Provides basic lexical analysis via regular expressions, which are assigned to callback functions. These functions are used to iterate over the resulting token list. Where you extend this class is in the syntax analysis and code generation/execution stages. Parser can also be used as a Finite State Machine (FSM), in which case saf.Parser.Buffer is handy for implementing the data structure creation.
1 <?php 2 3 // this example creates a comma-separated values (CSV) parser, 4 // which can be accomplished in PHP much easier than this, but 5 // this does serve as an example of what Parser can do, and hopefully 6 // you'll see more complex and more interesting uses for it. 7 8 class CSVParser extends Parser{ 9 10 function CSVParser (){ 11 // define our tokens 12 $this->addInternal ('_comma', ','); 13 $this->addInternal ('_newline', "\n"); 14 $this->addInternal ('_escape', '\\'); 15 16 // define our internal variables. 17 // we define $list as an array 18 // since we're parsing CSV files to create 19 // 2D arrays. note: in this case we're 20 // not using $output, but we don't want to 21 // override $output or the internal variables. 22 // in this case, we'll consider $output and 23 // $struct and $tokens and $regex reserved 24 // words. 25 $this->list = array (); 26 $this->skip = false; 27 $this->row = 0; 28 $this->column = 0; 29 $this->list[$this->row] = array (); 30 } 31 32 function _default ($token,$name){ 33 $this->list[$this->row][$this->column] .= $token; 34 } 35 36 function _comma ($token,$name){ 37 // commas are the separators 38 if ($this->skip){ 39 $this->list[$this->row][$this->column] .= ','; 40 $this->skip = false; 41 } else { 42 $this->column++; 43 } 44 } 45 46 function _newline ($token,$name){ 47 // increment 48 $this->row++; 49 $this->column = 0; 50 $this->list[$this->row] = array (); 51 } 52 53 function _escape ($token,$name){ 54 if ($this->skip){ 55 $this->list[$this->row][$this->column] .= '\\'; 56 $this->skip = false; 57 } else { 58 $this->skip = true; 59 } 60 } 61 } 62 63 $data = 'Joe,Smith,joe@yoursite.com 64 Phil,Johnson,phil@yoursite.com 65 Bert,Morris,bert@yoursite.com'; 66 67 $csv = new CSVParser (); 68 $csv->parse ($data); 69 70 echo '<pre>'; 71 print_r($csv->list); 72 echo '</pre>'; 73 74 ? >
Contains a list of switches to the preg_split() and
preg_match() regular expression evaluations Default is 's', for dot-all mode. Note that these are PCRE (Perl-Compatible Regular Expression) expressions, not ereg() calls. For more info about switches, check out the PHP documentation at http://www.php.net/manual/en/pcre.pattern.modifiers.php
Defines a token whose callback function has the same name as
$name, and is a method defined in the subclass of Parser (the class you create when you create a custom parser). Tokens are literal strings, unless $quote is set to false, in which case their values become active pieces of the token parsing regular expression.
This is the default token handler. It merely returns
the token sent to it, which will be added to the output string in the parse() method, thereby recreating the original source data. This method is usually overridden when this class is extended.
Sitellite Application Framework
