thinkphp Source Learning to_guid_string function generates a unique identification number based on PHP various types of variables

/**
* Generate unique identification numbers based on PHP various types of variables
* @param mixed $mix variables
* @return String
*/

Function to_guid_string ($mix)  {    if  (Is_object ($mix))  {         return spl_object_hash ($mix);//spl_object_hash -  Returns the hash id     } elseif  (Is_resource ($mix)) of the specified object  {//is_resource  -  detects if a variable is a resource type           $mix  = get_resource_ Type ($mix)  . strval ($mix);//get_resource_type -  return resource (Resource) types  //strval -   Get the string value of a variable     } else {         $mix  = serialize ($mix);//serialize -  produces a representation of a stored value//$name = "Jin Sha Wan"   serialize series   For s:12: "Jin Sha Harbor";     }    return md5 ($mix);//md5 -  computes the string  MD5  hash value}class student{    public  $name = ' Jin Sha harbour ';} $stu =new student ();//Object $fp = fopen ("D:/wamP/counter.txt "," w ");//Resources $name=" Jin Sha Harbor ";//String echo to_guid_string ($stu);echo " <br/> "; echo to_ Guid_string ($fp);echo  "<br/>"; echo to_guid_string ($name);

The result of the operation is:

00000000411ac22f0000000001dac5a4
7c8337ca66fc7eb79d20461b44630219
99a71c3a715645befef323c9a805f662

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thinkphp Source Learning to_guid_string function generates a unique identification number based on PHP various types of variables