
<?php
$foo = 10;
$bar = 20;
function change() {
global $foo;
//echo '函数内部$foo = '.$foo.'<br />';
//如果不把$bar定义为global变量,函数体内是不能访问$bar的
$bar = 0;
$foo++;
}
change();
echo $foo, ' ', $bar;
?>
typedef struct _zval_struct zval;
...
struct _zval_struct {
/* Variable information */
zvalue_value value; /* value */
zend_uint refcount__gc;
zend_uchar type; /* active type */
zend_uchar is_ref__gc;
};



