@psalm-assert-if-false
The @psalm-assert-if-false tag asserts the given type for an argument or variable when the function returns false. It is defined by the static analyzer Psalm, alongside @psalm-assert.
"@psalm-assert-if-false" <Type> <Variable> [ <Description> ]
Parsing a @psalm-assert-if-false tag produces an AssertIfFalseTag instance, carrying the asserted $type and $variable alongside the $name and optional $description every Tag already provides.
final class AssertIfFalseTag extends TypedVariableTag {}
The same AssertIfFalseTag is produced by @phpstan-assert-if-false and @phan-assert-if-false, which restate the same assertion for their respective tools.
See Psalm's supported annotations.
08 July 2026