php-grammarAn open source EBNF grammar for PHP.

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PHP 8.5 Production

concatenation-expression

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concatenation-expression 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: shift-expressionshift-expression"."Explore production: shift-expressionshift-expression
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
concatenation-expression =
    shift-expression , { "." , shift-expression } ;

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shift-expression
Referenced by 2
pipe-expressionconcatenation-prefix-context

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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.

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