php-grammarAn open source EBNF grammar for PHP.

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PHP 8.5 Production

boolean-not-prefix-context

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

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instanceof-prefix-context boolean-not-prefix-context
Referenced by 2
multiplicative-prefix-contextboolean-not-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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