php-grammarAn open source EBNF grammar for PHP.

Grammar explorer

PHP 8.5 Production

parameter

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

parameter 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: attribute-groupsattribute-groupsExplore production: parameter-modifiersparameter-modifiersExplore production: optional-type-without-staticoptional-type-without-static"&""..."Explore production: variablevariable"="Explore production: parameter-defaultparameter-defaultExplore production: property-hook-blockproperty-hook-block
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
parameter =
    [ attribute-groups ] , parameter-modifiers , optional-type-without-static ,
    [ "&" ] , [ "..." ] , variable , [ "=" , parameter-default ] ,
    [ property-hook-block ] ;

Explore next

attribute-groups parameter-modifiers optional-type-without-static variable parameter-default property-hook-block
Referenced by 1
parameter-list

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