PHP 5.6.0beta1 released

ReflectionParameter::allowsNull

(PHP 5)

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

add a note add a note

User Contributed Notes 1 note

up
1
Geoffrey LAURENT
11 months 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
To Top