php-grammarAn open source EBNF grammar for PHP.

Grammar explorer

PHP 8.5 Production

array-pair

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

array-pair 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: expressionexpressionExplore production: expressionexpression"=>"Explore production: expressionexpression"&"Explore production: variable-expressionvariable-expressionExplore production: expressionexpression"=>""&"Explore production: variable-expressionvariable-expression"..."Explore production: expressionexpressionExplore production: long-list-expressionlong-list-expressionExplore production: expressionexpression"=>"Explore production: long-list-expressionlong-list-expression
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
array-pair =
      expression
    | expression , "=>" , expression
    | "&" , variable-expression
    | expression , "=>" , "&" , variable-expression
    | "..." , expression
    | long-list-expression
    | expression , "=>" , long-list-expression ;

Explore next

expression variable-expression long-list-expression
Referenced by 1
array-pair-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