PHP 7.0.6 Released

ReflectionParameter::allowsNull

(PHP 5, PHP 7)

ReflectionParameter::allowsNullChecks if null is allowed

Description

public bool ReflectionParameter::allowsNull ( void )

Checks whether the parameter allows NULL.

Warning

This function is currently not documented; only its argument list is available.

Parameters

This function has no parameters.

Return Values

TRUE if NULL is allowed, otherwise FALSE

See Also

User Contributed Notes

Geoffrey LAURENT
2 years ago
The allowsNull method look if arguments have a type.
If a type is defined, null is allowed only if default value is null.

<?php
function myfunction ( $param ) {
   
}

echo (new
ReflectionFunction("myfunction"))->getParameters()[0]->allowsNull() ? "true":"false";

?>

Result : true

<?php
function myfunction ( stdClass $param ) {
   
}

echo (new
ReflectionFunction("myfunction"))->getParameters()[0]->allowsNull() ? "true":"false";

?>

Result : false

<?php
function myfunction ( stdClass $param = null ) {
   
}

echo (new
ReflectionFunction("myfunction"))->getParameters()[0]->allowsNull() ? "true":"false";
?>

Result : true
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