_COOKIE Info on the server Side

I want to get the cookie information stored using setcookie function in the source code of the php.. not the php开发者_如何转开发 source code.. What is the corresponding C code for _COOKIE['xx'];

In other words where is the _COOKIE array created and populated?

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The $_COOKIE variable doesn't use JIT (just-in-time initialization), so it's always accessible by reading the global variables table EG(symbol_table):

zval **cookie_var;
if (zend_hash_find(&EG(symbol_table), "_COOKIE", sizeof("_COOKIE"),
        (void**)&cookie_var) == SUCCESS) {
    /* do something with cookie_var */
} else {
    /* handle error; shouldn't happen */
}

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Cookie info comes as part of your http headers (that the browser sends). PHP makes it easier to access them by parsing it out in to a neat array and putting it in _COOKIE. You'll have to do it in C.