[PHP-DEV] New Function: is_scalar From: Zak Greant (zak <email protected>)
Date: 12/14/00

Hello All,

I would like add a trivial little function that tests to see if a value is a
scalar.

I have written the function and tested it on Mandrake 7.1 with good results.
(The function seemed very straightforward to implement - I based it on
is_numeric())

Does anyone object to this function being added to the codebase?

Personally, I would use this function to replace code snippets like:

if (is_array ($foo) || is_object ($foo) || is_resource ($foo))
    return FALSE;

Would anyone care to quickly review my patch and ensure that it does not do
anything silly. :)

--- basic_functions.h Wed Nov 29 08:37:38 2000
+++ basic_functions.h.zak Thu Dec 14 16:09:17 2000
@@ -73,6 +73,7 @@
 PHP_FUNCTION(is_long);
 PHP_FUNCTION(is_double);
 PHP_FUNCTION(is_numeric);
+PHP_FUNCTION(is_scalar);
 PHP_FUNCTION(is_string);
 PHP_FUNCTION(is_array);
 PHP_FUNCTION(is_object);

--- basic_functions.c Wed Dec 13 16:02:09 2000
+++ basic_functions.c.zak Thu Dec 14 16:09:10 2000
@@ -319,6 +319,7 @@
        PHP_FE(is_double,
first_arg_allow_ref)
        PHP_FALIAS(is_real, is_double,
first_arg_allow_ref)
        PHP_FE(is_numeric,
NULL)
+ PHP_FE(is_scalar,
NULL)
        PHP_FE(is_string,
first_arg_allow_ref)
        PHP_FE(is_array,
first_arg_allow_ref)
        PHP_FE(is_object,
first_arg_allow_ref)
@@ -1403,6 +1404,35 @@
        }
 }
 /* }}} */
+
+
+/* {{{ proto bool is_scalar(mixed value)
+ Returns true if value is a scalar value */
+PHP_FUNCTION(is_scalar)
+{
+ zval **arg;
+ int result;
+
+ if (ZEND_NUM_ARGS() !=1 || zend_get_parameters_ex(1, &arg) ==
FAILURE) {
+ WRONG_PARAM_COUNT;
+ }
+
+ switch (Z_TYPE_PP(arg)) {
+ case IS_BOOL:
+ case IS_DOUBLE:
+ case IS_LONG:
+ case IS_NULL:
+ case IS_STRING:
+ RETURN_TRUE;
+ break;
+
+ default:
+ RETURN_FALSE;
+ break;
+ }
+}
+/* }}} */
+

 /*
        1st arg = error message

Thanks!

 --zak 

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