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Php Variable Circular References
Circular-references has been a long outstanding issue with PHP. They are
caused by the fact that PHP uses a reference counted memory allocation
mechanism for its internal variables. This causes problems for longer
running scripts (such as an Application Server
or
the eZ Components
test-suite) as the memory is not freed until the end of the request. But
not everybody is aware on what exactly the problem is, so here is a
small introduction to circular references in PHP.
In PHP a refcount value is kept for every variable container (zval).
Those containers are pointed to from a function's symbol table that
contains the names of all the variables in the function's scope. Every
variable, array element or object property that points to a zval will
increase its refcount by one. The refcount of a zval container is
decreased by one whenever call unset() on a variable name that points to
it, or when a variable goes away because the ......
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class test
{
function __construct()
{
//your code
}
}
class test
{
function test()//Èç¹û·½·¨Ãû¸úÀàÃû×ÖÒ»Ñù£¬½«±»ÈÏΪÊǹ¹Ô캯Êý
{
//your code
}
}
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{
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function __construct($input = '')
{
$this->test = $input;
}
function getTest()
{
return $this->test;
......