php-grammarAn open source EBNF grammar for PHP.

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PHP 8.5 Production

yield-from-expression

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yield-from-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: assignment-expressionassignment-expressionExplore production: assignment-prefix-contextassignment-prefix-context"yield""from"Explore production: yield-from-expressionyield-from-expression
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
yield-from-expression =
    assignment-expression
    | [ assignment-prefix-context ] , "yield" , "from" , yield-from-expression ;

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assignment-expression assignment-prefix-context yield-from-expression
Referenced by 2
yield-from-expressionyield-key-expression

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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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