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82 lines
2.2 KiB
Markdown
82 lines
2.2 KiB
Markdown
PHP Parser
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==========
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This is a PHP 5.5 (and older) parser written in PHP. It's purpose is to simplify static code analysis and
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manipulation.
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[**Documentation for version 0.9.x**][doc_0_9] (current stable).
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[Documentation for version 1.0-dev][doc_master]
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(for >= PHP 5.3, using namespaced names, but compatible with old names).
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***Note: This project is experimental, so the API is subject to change.***
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In a Nutshell
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-------------
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Basically, the parser does nothing more than turn some PHP code into an abstract syntax tree. ("nothing
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more" is kind of sarcastic here as PHP has a ... uhm, let's just say "not nice" ... grammar, which makes
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parsing PHP very hard.)
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For example, if you stick this code in the parser:
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```php
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<?php
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echo 'Hi', 'World';
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hello\world('foo', 'bar' . 'baz');
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```
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You'll get a syntax tree looking roughly like this:
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```
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array(
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0: Stmt_Echo(
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exprs: array(
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0: Scalar_String(
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value: Hi
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)
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1: Scalar_String(
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value: World
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)
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)
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)
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1: Expr_FuncCall(
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name: Name(
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parts: array(
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0: hello
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1: world
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)
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)
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args: array(
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0: Arg(
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value: Scalar_String(
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value: foo
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)
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byRef: false
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)
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1: Arg(
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value: Expr_Concat(
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left: Scalar_String(
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value: bar
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)
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right: Scalar_String(
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value: baz
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)
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)
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byRef: false
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)
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)
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)
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)
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```
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You can then work with this syntax tree, for example to statically analyze the code (e.g. to find
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programming errors or security issues).
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Additionally, you can convert a syntax tree back to PHP code. This allows you to do code preprocessing
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(like automatedly porting code to older PHP versions).
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So, that's it, in a nutshell. You can find everything else in the [docs][doc_master].
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[doc_0_9]: https://github.com/nikic/PHP-Parser/tree/0.9/doc
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[doc_master]: https://github.com/nikic/PHP-Parser/tree/master/doc |