yannickl88 / css-tokenizer
CSS tokenizer
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Requires
- php: >=5.6
Requires (Dev)
- phpunit/phpunit: ^4.6.0
README
PHP implementation of a CSS tokenizer. This implementation was heavily inspired by the javascript variant that was developed by https://github.com/postcss/postcss. However, the result is slightly different.
Usage
Usage of the tokenizer is pretty straight forward:
<?php use Yannickl88\Component\CSS\Tokenizer; $tokens = (new Tokenizer())->tokenize('span { padding: 2px; margin: 2px; }');
This is equivalent to:
$tokens = [ new Token(Token::T_WORD, 'span', 1, 1, 1, 4), new Token(Token::T_WHITESPACE, ' ', 1, 5), new Token(Token::T_OPENCURLY, '{', 1, 6), new Token(Token::T_WHITESPACE, ' ', 1, 7), new Token(Token::T_WORD, 'padding', 1, 8, 1, 14), new Token(Token::T_COLON, ':', 1, 15), new Token(Token::T_WHITESPACE, ' ', 1, 16), new Token(Token::T_WORD, '2px', 1, 17, 1, 19), new Token(Token::T_SEMICOLON, ';', 1, 20), new Token(Token::T_WHITESPACE, ' ', 1, 21), new Token(Token::T_WORD, 'margin', 1, 22, 1, 27), new Token(Token::T_COLON, ':', 1, 28), new Token(Token::T_WHITESPACE, ' ', 1, 29), new Token(Token::T_WORD, '2px', 1, 30, 1, 32), new Token(Token::T_SEMICOLON, ';', 1, 33), new Token(Token::T_WHITESPACE, ' ', 1, 34), new Token(Token::T_CLOSECURLY, '}', 1, 35), ];
What you do next is entirely up to you!
Token types
If you have a token, you can access some public properties:
$token->type; // for the type $token->chars; // for the characters $token->lines; // array containing start and (sometimes) end line $token->offsets; // array containing start and (sometimes) end offset
Note: Only tokens which can span multiple lines will have a second value in the
lines
andoffsets
field. These areT_WORD
,T_WHITESPACE
,T_STRING
,T_ADWORD
, andT_COMMENT
.
The following types are defined:
T_WHITESPACE
, white space characters like\t
,\n
,\r
and\f
.T_WORD
, all words, likecolor
,padding-top
or12px
.T_COLON
, colon:
.T_SEMICOLON
, semi-colon;
.T_COMMA
, comma,
.T_TILDE
, tilde~
.T_STRING
, everything between'
or"
quotes, like"/path/to/my/image.jpg"
.T_OPENBRACKET
, open bracket(
.T_CLOSEBRACKET
, close bracket)
.T_OPENCURLY
, open curly bracket{
.T_CLOSECURLY
, close curly bracket}
T_OPENSQUARE
, open square bracket[
.T_CLOSESQUARE
, close square bracket]
T_ATWORD
, all words that start with a@
, like@media
or@font-face
.T_COMMENT
, comments, like/* comment */
or// comment
.
Note: There is also
T_BRACKETS
, however this is only in case of parse errors that you will see this token.
Installation
Installing is pretty easy, this package is available on packagist.
$ composer require yannickl88/css-tokenizer
Or you can add this to your composer.json manually:
"require" : { "yannickl88/css-tokenizer" : "*@dev-master" }
Note: You can use dev-master if you want the latest changes, but this is not recommended for production code!