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Informations about the package antlr4-php-runtime
ANTLR4 Runtime for PHP
First steps
1. Install ANTLR4
The getting started guide should get you started.
2. Install the PHP ANTLR runtime
Each target language for ANTLR has a runtime package for running parser generated by ANTLR4. The runtime provides a common set of tools for using your parser.
Install the runtime with Composer:
3. Generate your parser
You use the ANTLR4 "tool" to generate a parser. These will reference the ANTLR runtime, installed above.
Suppose you're using a UNIX system and have set up an alias for the ANTLR4 tool as described in the getting started guide. To generate your PHP parser, run the following command:
For a full list of antlr4 tool options, please visit the tool documentation page.
Complete example
Suppose you're using the JSON grammar from https://github.com/antlr/grammars-v4/tree/master/json.
Then, invoke antlr4 -Dlanguage=PHP JSON.g4. The result of this is a
collection of .php files in the parser directory including:
Another common option to the ANTLR tool is -visitor, which generates a parse
tree visitor, but we won't be doing that here. For a full list of antlr4 tool
options, please visit the tool documentation page.
We'll write a small main func to call the generated parser/lexer
(assuming they are separate). This one writes out the encountered
ParseTreeContext's:
Create a example.json file:
Parse the input file:
The expected output is:
Useful information
The Definitive ANTLR 4 Reference
Programmers run into parsing problems all the time. Whether it’s a data format like JSON, a network protocol like SMTP, a server configuration file for Apache, a PostScript/PDF file, or a simple spreadsheet macro language—ANTLR v4 and this book will demystify the process. ANTLR v4 has been rewritten from scratch to make it easier than ever to build parsers and the language applications built on top. This completely rewritten new edition of the bestselling Definitive ANTLR Reference shows you how to take advantage of these new features.
You can buy the book The Definitive ANTLR 4 Reference at amazon or an electronic version at the publisher's site.
You will find the Book source code useful.
Additional grammars
This repository is a collection of grammars without actions where the root directory name is the all-lowercase name of the language parsed by the grammar.
