Parsica Laravel Package
parsica-php/parsica
Parsica is a PHP parser combinator library for building custom parsers from small reusable pieces. Compose complex grammars with a fluent API, parse strings into structured results, and handle errors cleanly—ideal for DSLs, config formats, and language tooling.
title: Naming Conventions sidebar_label: Naming Conventions
String and Character
PHP doesn't have a separate type for strings and characters, as opposed to some languages where string is defined as a list of characters. Still, as a convention in Parsica and its documentation, we generally use 'a', '1' (single quoted) to indicate a single character, and "a", "abc123" (double quoted) to indicate a string.
We also use single quotes to indicate constant strings or symbols, such as 'STATUS_SUCCESS';
Predicates
Predicates are either prefixed with is or suffixed with pred.
<?php
$predicate = orPred(isEqual('5'), isEqual('6'));
assertTrue($predicate('6'));
Character Parsers
A parser for a single character is always suffixed with Char, as in digitChar(). These always output a string.
Case
Some parsers have case-insensitive versions. These are sufficed with 'I'.
<?php
$parser = stringI('hello world');
$result = $parser->tryString("hElLO WoRlD");
assertEquals("hElLO WoRlD", $result->output());
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