php-grammarAn open source EBNF grammar for PHP.

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PHP 8.5 Production

boolean-not-expression

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boolean-not-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: instanceof-expressioninstanceof-expressionExplore production: instanceof-prefix-contextinstanceof-prefix-context"!"Explore production: boolean-not-expressionboolean-not-expression
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
boolean-not-expression =
    instanceof-expression
    | [ instanceof-prefix-context ] , "!" , boolean-not-expression ;

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instanceof-expression instanceof-prefix-context boolean-not-expression
Referenced by 2
multiplicative-expressionboolean-not-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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