php-grammarAn open source EBNF grammar for PHP.

Grammar explorer

PHP 8.5 Production

decimal-digits

Read left to right. Select any rule to explore it.

decimal-digits railroad diagramRead left to right. Branches are alternatives, bypasses are optional, and loops repeat. Select a production to explore it. The EBNF and linked references follow below.Explore production: decimal-digitdecimal-digitExplore production: numeric-separatornumeric-separatorExplore production: decimal-digitdecimal-digit
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
decimal-digits =
    decimal-digit , { [ numeric-separator ] , decimal-digit } ;

Explore next

decimal-digit numeric-separator
Referenced by 3
floating-literalexponent-partnumeric-string

Take it with you

The grammar, in plain text.

For reading, building tools, and exploring PHP.
Free to use under the MIT license.

php.ebnfPHP 8.5 · Canonical EBNF grammar php.mdPHP 8.5 · Grammar & source contract

A shared understanding of PHP.

php-grammar is an open source project documenting PHP syntax in a consistent, tool-independent format. The EBNF describes syntax; the accompanying specification defines lexical rules and contextual constraints.

Explore the project and contribute