/**
* Determine if the given abstract type has been resolved.
*
* @param string $abstract
* @return bool
*/
public function resolved($abstract)
{// a resolved person
$abstract = $this->normalize($abstract);// get a normal namespace
if ($this->isAlias($abstract)) {// check it is a alias
$abstract = $this->getAlias($abstract);// get the alias function name
}
return isset($this->resolved[$abstract]) || isset($this->instances[$abstract]);
}//Determine if the given abstract type has been resolved.
/**
* Determine if a given string is an alias.
*
* @param string $name
* @return bool
*/
public function isAlias($name)
{
return isset($this->aliases[$this->normalize($name)]);// return true or false ,determine the aliases array for the
}// check like determine , so wo need get a string that is function should be see as a alias本文出自 “专注php” 博客，请务必保留此出处http://jingshanls.blog.51cto.com/3357095/1770258
每天laravel-20160731| Container -3
原文：http://jingshanls.blog.51cto.com/3357095/1770258