static void user_tick_function_call(user_tick_function_entry *tick_fe TSRMLS_DC) /* {{{ */
{
	zval retval;
	zval *function = tick_fe->arguments[0];

	/* Prevent reentrant calls to the same user ticks function */
	if (! tick_fe->calling) {
		tick_fe->calling = 1;

		if (call_user_function(	EG(function_table), NULL,
								function,
								&retval,
								tick_fe->arg_count - 1,
								tick_fe->arguments + 1
								TSRMLS_CC) == SUCCESS) {
			zval_dtor(&retval);

		} else {
			zval **obj, **method;

			if (Z_TYPE_P(function) == IS_STRING) {
				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call %s() - function does not exist", Z_STRVAL_P(function));
			} else if (	Z_TYPE_P(function) == IS_ARRAY
						&& zend_hash_index_find(Z_ARRVAL_P(function), 0, (void **) &obj) == SUCCESS
						&& zend_hash_index_find(Z_ARRVAL_P(function), 1, (void **) &method) == SUCCESS
						&& Z_TYPE_PP(obj) == IS_OBJECT
						&& Z_TYPE_PP(method) == IS_STRING) {
				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call %s::%s() - function does not exist", Z_OBJCE_PP(obj)->name, Z_STRVAL_PP(method));
			} else {
				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call tick function");
			}
		}

		tick_fe->calling = 0;
	}
}
/* }}} */

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.