We can use this functionality to automatically pass arguments to our function based on some data structure.
NOTE: I am using a php 8.0> feature called "Nameds parameter"
<?php
$valuesToProcess = [
'name' => 'Anderson Lucas Silva de Oliveira',
'age' => 21,
'hobbie' => 'Play games'
];
function processUserData($name, $age, $job = "", $hobbie = "")
{
$msg = "Hello $name. You have $age years old";
if (!empty($job)) {
$msg .= ". Your job is $job";
}
if (!empty($hobbie)) {
$msg .= ". Your hobbie is $hobbie";
}
echo $msg . ".";
}
$refFunction = new ReflectionFunction('processUserData');
$parameters = $refFunction->getParameters();
$validParameters = [];
foreach ($parameters as $parameter) {
if (!array_key_exists($parameter->getName(), $valuesToProcess) && !$parameter->isOptional()) {
throw new DomainException('Cannot resolve the parameter' . $parameter->getName());
}
if(!array_key_exists($parameter->getName(), $valuesToProcess)) {
continue;
}
$validParameters[$parameter->getName()] = $valuesToProcess[$parameter->getName()];
}
$refFunction->invoke(...$validParameters);
?>
Results in:
Hello Anderson Lucas Silva de Oliveira. You have 21 years old. Your hobbie is Play games.
The ReflectionFunction class
(PHP 5, PHP 7, PHP 8)
Einführung
The ReflectionFunction class reports information about a function.
Klassenbeschreibung
/* Konstanten */
/* Geerbte Eigenschaften */
/* Methoden */
/* Geerbte Methoden */
}Vordefinierte Konstanten
ReflectionFunction Modifiers
ReflectionFunction::IS_DEPRECATED-
Indicates deprecated functions.
Changelog
| Version | Beschreibung |
|---|---|
| 8.0.0 | ReflectionFunction::export() was removed. |
Inhaltsverzeichnis
- ReflectionFunction::__construct — Constructs a ReflectionFunction object
- ReflectionFunction::export — Exports function
- ReflectionFunction::getClosure — Returns a dynamically created closure for the function
- ReflectionFunction::invoke — Invokes function
- ReflectionFunction::invokeArgs — Invokes function args
- ReflectionFunction::isAnonymous — Checks if a function is anonymous
- ReflectionFunction::isDisabled — Checks if function is disabled
- ReflectionFunction::__toString — Returns the string representation of the ReflectionFunction object
add a note
User Contributed Notes 2 notes
a dot lucassilvadeoliveira at gmail dot com ¶
4 years ago
Lorenz R.S. ¶
13 years ago
Here is a concise example of ReflectionFunction usage for Parameter Reflection / introspection (e.g. to automatically generate API descriptions)
<?php
$properties = $reflector->getProperties();
$refFunc = new ReflectionFunction('preg_replace');
foreach( $refFunc->getParameters() as $param ){
//invokes ■ReflectionParameter::__toString
print $param;
}
?>
prints:
Parameter #0 [ <required> $regex ]
Parameter #1 [ <required> $replace ]
Parameter #2 [ <required> $subject ]
Parameter #3 [ <optional> $limit ]
Parameter #4 [ <optional> &$count ]
