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runkit7_constant_redefine	runkit7_function_add

runkit7 Functions	Last updated: Mon, 26 Oct 2026

runkit7_constant_remove

(PECL runkit7 >= Unknown)

runkit7_constant_remove — Remove/Delete an already defined constant

Description

function runkit7_constant_remove(string $constant_name): bool

Parameters

constant_name: Name of the constant to remove. Either the name of a global constant, or classname::constname indicating a class constant.

Return Values

Returns true on success or false on failure.

See Also

define() - Defines a named constant
runkit7_constant_add() - Similar to define(), but allows defining in class definitions as well
runkit7_constant_redefine() - Redefine an already defined constant

runkit7_constant_redefine	runkit7_function_add

runkit7 Functions	Last updated: Mon, 26 Oct 2026