Robert Cummings a écrit :
Please explain how it can take up more than twice.
It is obvious for a C developper.
== 8< == Zend/zend.h
typedef struct _zval_struct zval;
typedef union _zvalue_value {
long lval; /* long value */
double dval; /* double value */
struct {
char *val;
int len;
} str;
HashTable *ht; /* hash table value */
zend_object_value obj;
} zvalue_value;
typedef struct _zend_object {
zend_class_entry *ce;
HashTable *properties;
HashTable *guards; /* protects from __get/__set ... recursion */
} zend_object;
struct _zval_struct {
/* Variable information */
zvalue_value value; /* value */
zend_uint refcount__gc;
zend_uchar type; /* active type */
zend_uchar is_ref__gc;
};
== 8< ==
When you write
$a = 1 ;
The $a variable don't contain only the integer, it contains a lot of
more stuff. This stuff is needed by the fact that a variable can contain
every types available in PHP.
So, I let you calculate the memory needed to store the variable, but
you can easily understand that they'll not be twice the previous memory
footprint, but a little more.
--
Mickaël Wolff aka Lupus Michaelis
http://lupusmic.org
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