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<?php
namespace Illuminate\Support;
use ReflectionClass;
use ReflectionMethod;
use ReflectionNamedType;
class Reflector
{
/**
* This is a PHP 7.4 compatible implementation of is_callable.
*
* @param mixed $var
* @param bool $syntaxOnly
* @return bool
*/
public static function isCallable($var, $syntaxOnly = false)
{
if (! is_array($var)) {
return is_callable($var, $syntaxOnly);
}
if ((! isset($var[0]) || ! isset($var[1])) ||
! is_string($var[1] ?? null)) {
return false;
}
if ($syntaxOnly &&
(is_string($var[0]) || is_object($var[0])) &&
is_string($var[1])) {
return true;
}
$class = is_object($var[0]) ? get_class($var[0]) : $var[0];
$method = $var[1];
if (! class_exists($class)) {
return false;
}
if (method_exists($class, $method)) {
return (new ReflectionMethod($class, $method))->isPublic();
}
if (is_object($var[0]) && method_exists($class, '__call')) {
return (new ReflectionMethod($class, '__call'))->isPublic();
}
if (! is_object($var[0]) && method_exists($class, '__callStatic')) {
return (new ReflectionMethod($class, '__callStatic'))->isPublic();
}
return false;
}
/**
* Get the class name of the given parameter's type, if possible.
*
* @param \ReflectionParameter $parameter
* @return string|null
*/
public static function getParameterClassName($parameter)
{
$type = $parameter->getType();
if (! $type instanceof ReflectionNamedType || $type->isBuiltin()) {
return;
}
$name = $type->getName();
if (! is_null($class = $parameter->getDeclaringClass())) {
if ($name === 'self') {
return $class->getName();
}
if ($name === 'parent' && $parent = $class->getParentClass()) {
return $parent->getName();
}
}
return $name;
}
/**
* Determine if the parameter's type is a subclass of the given type.
*
* @param \ReflectionParameter $parameter
* @param string $className
* @return bool
*/
public static function isParameterSubclassOf($parameter, $className)
{
$paramClassName = static::getParameterClassName($parameter);
return ($paramClassName && class_exists($paramClassName))
? (new ReflectionClass($paramClassName))->isSubclassOf($className)
: false;
}
}