Index: ext/sysvshm/php_sysvshm.h
===================================================================
RCS file: /repository/php-src/ext/sysvshm/php_sysvshm.h,v
retrieving revision 1.17.2.1
diff -u -p -d -r1.17.2.1 php_sysvshm.h
--- ext/sysvshm/php_sysvshm.h	1 Jan 2006 12:50:16 -0000	1.17.2.1
+++ ext/sysvshm/php_sysvshm.h	19 Jul 2006 12:17:49 -0000
@@ -62,6 +62,7 @@ PHP_FUNCTION(shm_detach);
 PHP_FUNCTION(shm_remove);
 PHP_FUNCTION(shm_put_var);
 PHP_FUNCTION(shm_get_var);
+PHP_FUNCTION(shm_has_var);
 PHP_FUNCTION(shm_remove_var);
 
 extern sysvshm_module php_sysvshm;
Index: ext/sysvshm/sysvshm.c
===================================================================
RCS file: /repository/php-src/ext/sysvshm/sysvshm.c,v
retrieving revision 1.70.2.2.2.1
diff -u -p -d -r1.70.2.2.2.1 sysvshm.c
--- ext/sysvshm/sysvshm.c	29 Jun 2006 09:03:27 -0000	1.70.2.2.2.1
+++ ext/sysvshm/sysvshm.c	19 Jul 2006 12:17:50 -0000
@@ -46,6 +46,7 @@ zend_function_entry sysvshm_functions[] 
 	PHP_FE(shm_detach, NULL)
 	PHP_FE(shm_put_var, NULL)
 	PHP_FE(shm_get_var, NULL)
+	PHP_FE(shm_has_var, NULL)
 	PHP_FE(shm_remove_var, NULL)
 	{NULL, NULL, NULL}	
 };
@@ -276,6 +277,24 @@ PHP_FUNCTION(shm_put_var)
 }
 /* }}} */
 
+/* {{{ proto bool shm_has_var(int id, int variable_key)
+   Checks whether variable_key exists */
+PHP_FUNCTION(shm_has_var)
+{
+	zval *rsrc;
+	long key;
+	sysvshm_shm *shmptr = NULL;
+	
+	if (SUCCESS != zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rl", &rsrc, &key)) {
+		RETURN_FALSE;
+	}
+	
+	ZEND_FETCH_RESOURCE(shmptr, sysvshm_shm *, &rsrc, -1, "sysvshm", php_sysvshm.le_shm);
+	
+	RETURN_BOOL(php_check_shm_data(shmptr->ptr, key) >= 0);
+}
+/* }}} */
+
 /* {{{ proto mixed shm_get_var(int id, int variable_key)
    Returns a variable from shared memory */
 PHP_FUNCTION(shm_get_var)