ReflectionParameter: : getDefaultValue
(PHP 5 >= 5.0.3, PHP 7)
ReflectionParameter::getDefaultValue — Gets default parameter value
Description
Gets the default value of the parameter for a user-defined function or method. If the parameter is not optional a ReflectionException will be thrown.
Examples
Example #1 Getting default values of function parameters
<?php
function foo($test, $bar = 'baz')
{
echo $test . $bar;
}
$function = new ReflectionFunction('foo');
foreach ($function->getParameters() as $param) {
echo 'Name: ' . $param->getName() . PHP_EOL;
if ($param->isOptional()) {
echo 'Default value: ' . $param->getDefaultValue() . PHP_EOL;
}
echo PHP_EOL;
}
?>
The above example will output:
Name: test Name: bar Default value: baz
Notes
Note:
Due to implementation details, it is not possible to get the default value of built-in functions or methods of built-in classes. Trying to do this will result a ReflectionException being thrown.
See Also
- ReflectionParameter::isOptional() - Checks if optional
- ReflectionParameter::isDefaultValueAvailable() - Checks if a default value is available
- ReflectionParameter::getDefaultValueConstantName() - Returns the default value's constant name if default value is constant or null
- ReflectionParameter::isPassedByReference() - Checks if passed by reference
English translation
You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.
Thank you in advance.
Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-reflectionparameter.getdefaultvalue.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.
