Description:
------------
The manual states "Returns the value of the configuration option as a string on success, or an empty string on failure"

Some options (eg docref_ext, disable_classes) have default values of an empty string, in these cases ini_get() will return an empty string when the function has failed AND when it has succeeded.

The problem is in the following code:
ZEND_API char *zend_ini_string(char *name, uint name_length, int orig)
{
        zend_ini_entry *ini_entry;
        TSRMLS_FETCH();
 
        if (zend_hash_find(EG(ini_directives), name, name_length, (void **) &ini_entry)==SUCCESS) {
                if (orig && ini_entry->modified) {
                        return ini_entry->orig_value;
                } else {
                        return ini_entry->value;
                }
        }
 
        return "";
}



Reproduce code:
---------------
Here is a test that will always pass even when ini_get fails.
--TEST--
ini_get returns value of the configuration option as a string on success, empty string on failure
--FILE--
<?php
var_dump(ini_get("disable_classes"));
?>
--EXPECT--
string(0) ""





Expected result:
----------------
I would like to be able to see a failure - if ini_get() fails. For example ini_get() could return FALSE on failure (as ini_set() does), if there are no configuration options that have a default value of FALSE.

Actual result:
--------------
Always a null string.