php-grammarAn open source EBNF grammar for PHP.

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PHP 8.5 Production

unary-expression

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unary-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: power-expressionpower-expressionExplore production: power-prefix-contextpower-prefix-context"+""-""~""@"Explore production: unary-expressionunary-expressionExplore production: cast-expressioncast-expression
Production LiteralBranch: choiceBypass: optionalLoop: repeat
EBNF source
unary-expression =
    power-expression
    | [ power-prefix-context ] , ( ( "+" | "-" | "~" | "@" ) , unary-expression | cast-expression ) ;

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power-expression power-prefix-context unary-expression cast-expression
Referenced by 3
instanceof-expressionunary-expressioncast-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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