civicrm / php-array-doc
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Requires
- php: ~7.3|~8.0
README
This is a parser/printer for a subset of PHP focused on data. A document looks like:
<?php return [ 'key_1' => 'value_1', 'key_2' => [2.1, 2.2, 2.3], 'key_3' => [ 'part_a' => 'Apple', 'part_b' => 'Banana', ] ];
Additionally, you may declare tagged/factory values:
<?php use MyHelper as H; return [ 'name' => 'greeter', 'label' => H::translate('Hello World'), ];
Or even:
use MyHelper as H; return H::record([ 'name' => 'greeter', 'label' => H::translate('Hello World'), ]);
PhpArrayDocument
is a compatible subset of PHP, with these considerations:
- Allows
array
values andscalar
values (string
,int
,bool
, etc). - Allows tagged-values or factory-functions which look like global or static method-calls.
- Allows deferred construction (
fn() => [...data...]
) - Prohibits objects, loops, math, concatenation, includes, custom functions, etc.
Model
- Basic Concepts
- Substance: Each "PHP array document" contains a tree of
array
s andscalar
s. - Metadata: Individual values may be annotated with comments and/or factory-functions (such as
ts(...)
). - Evaluation: If you
include
orrequire
the PHP document directly, you will literally getarray
s andscalar
s. - Read/Write: If you need to programmatically inspect or update the content, then the
PhpArrayDocument
aims to help.
- Substance: Each "PHP array document" contains a tree of
- Verbs
- Parse: Read the PHP document as an instance of
PhpArrayDocument
- Print: Render
PhpArrayDocument
as a string (<?php return [...]
) - Import Data: Add basic PHP array data to a
PhpArrayDocument
(without any metadata/comments/factory-functions) - Export Data: Grab the PHP (discarding any metadata/comments/factory-functions)
- Walk Nodes: Visit all the nodes in the tree. Useful for general filtering/searching/replacing.
- Parse: Read the PHP document as an instance of
- Classes
- Data-Focused Classes
PhpArrayDocument
: This captures the overall*.php
file, including any top-level elements (use
or docblocks) and the rootarray
.ArrayNode
(extendsBaseNode
): An element in the tree that corresponds toarray()
ArrayItemNode
(extendsBaseNode
): A key-value pair that exists within anarray()
ScalarNode
(extendsBaseNode
): An atomic value that lives inside an array.
- Functionality-Focused Classes
Parser
: Take a rawstring
. Generate aPhpArrayDocument
.Printer
: Take aPhpArrayDocument
. Generate a string
- Data-Focused Classes
Examples
# Generate a file from basic array data use PhpArrayDocument\PhpArrayDocument; $doc = PhpArrayDocument::create(); $doc->getRoot()->importData([ 'foo...', 'bar...', ]); file_put_contents($file, (new Printer())->print($doc));
# Update a file use PhpArrayDocument\Parser; $file = 'my-example.data.php'; $doc = (new Parser())->parse(file_get_contents($file)); $doc->root['label'] = ScalarNode::create('Hello World') ->setFactory('E::ts'); file_put_contents($file, (new Printer())->print($doc));
# Rename a factory method $doc = (new Parser())->parse(file_get_contents($file)); foreach ($doc->root->walkNodes() as $node) { if ($node->getFactory() === 'OldHelper::method') { $node->setFactory('NewHelper::method'); } }
Cheatsheet
Some commands to help with debugging:
## Parse a PHP file cat examples/simple-array.php | ./scripts/parse.php | less ## Parse an improvised PHP snippet echo '<?php return [1,2,3];' | ./scripts/parse.php ## Tokenize a PHP file cat examples/simple-array.php | ./scripts/tokenize.php | less ## Tokenize an improvised PHP snippet echo '<?php return [1,2,3];' | ./scripts/tokenize.php