PHP 5.4.31 Released

ReflectionParameter::allowsNull

(PHP 5)

ReflectionParameter::allowsNullبررسی مجاز بودن null

Description

public bool ReflectionParameter::allowsNull ( void )

بررسی مجاز بودن پارامتر NULL.

Warning

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

Parameters

This function has no parameters.

Return Values

TRUE اگر NULL مجاز باشد در غیر این صورت FALSE

See Also

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User Contributed Notes 1 note

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1
Geoffrey LAURENT
1 year 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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