This method will check in the following order and act accordingly:
- a property defined by a setter: return whether the property is set
- a property of a behavior: return whether the property is set
- return false for non existing properties
Do not call this method directly as it is a PHP magic method that
will be implicitly called when executing isset($component->property).
/**
* @inheritdoc
*/
public function __isset($name)
{
if (property_exists($this->obj, $name)) {
return $this->obj->{$name} !== null;
}
return parent::__isset($name);
}
public function __isset($name)
{
if ($name == 'jsVar') {
return isset($this->_jsVar);
}
return parent::__isset($name);
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking if the named component is loaded.
* @param string $name the property name or the event name
* @return boolean whether the property value is null
*/
public function __isset($name)
{
if ($this->has($name, true)) {
return true;
} else {
return parent::__isset($name);
}
}
public function __isset($name)
{
if (isset($this->_api->{$name})) {
return true;
} else {
return parent::__isset($name);
}
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking if the named component is loaded.
* @param string $name the property name or the event name
* @return boolean whether the property value is null
*/
public function __isset($name)
{
// 可以看到，如果用isset去判断是否含有某个component，只能判断已经实例化过的component
if ($this->has($name, true)) {
return true;
} else {
return parent::__isset($name);
}
}
/**
* @param string $name
* @return bool|mixed
* @throws \yii\base\UnknownPropertyException
*/
public function __isset($name)
{
if (isset($this->objects[$name])) {
return true;
}
return parent::__isset($name);
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking
* if the named component is loaded.
* @param string $name the property name or the event name
* @return boolean whether the property value is null
*/
public function __isset($name)
{
if ($this->hasComponent($name)) {
return $this->getComponent($name) !== null;
} else {
return parent::__isset($name);
}
}
/**
* Checks if a property value is null.
* Do not call this method. This is a PHP magic method that we override
* to allow using isset() to detect if a component property is set or not.
* @param string $name the property name
* @return boolean
*/
public function __isset($name)
{
$getter = 'get' . $name;
if (property_exists($this->getClient(), $name)) {
return true;
} elseif (method_exists($this->getClient(), $getter)) {
return true;
}
return parent::__isset($name);
}
