(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ReflectionFunctionAbstract::getExtensionName — Gets extension name
public ReflectionFunctionAbstract::getExtensionName(): string|false
Get the extensions name.
This function has no parameters.
The name of the extension which defined the function, or false for user-defined functions.
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https://www.php.net/manual/en/reflectionfunctionabstract.getextensionname.php