cvs: phpdoc /en/language types.xml /en/reference/var/functions is-null.xml

mfischer Mon Jun 10 05:15:37 2002 EDT Modified files: /phpdoc/en/language types.xml /phpdoc/en/reference/var/functions is-null.xml Log: - Properly document when a var is considered to be NULL and when not, closes #13577. Index: phpdoc/en/language/types.xml diff -u phpdoc/en/language/types.xml:1.83 phpdoc/en/language/types.xml:1.84 --- phpdoc/en/language/types.xml:1.83 Sun Jun 9 15:52:00 2002 +++ phpdoc/en/language/types.xml Mon Jun 10 05:15:36 2002 @@ -1,5 +1,5 @@ <?xml version="1.0" encoding="iso-8859-1"?> -<!-- $Revision: 1.83 $ --> +<!-- $Revision: 1.84 $ --> <chapter id="language.types"> <title>Types</title> @@ -1807,6 +1807,26 @@ The null type was introduced in PHP 4 </simpara> </note> + <para> + A variable is considered to be &null; if + <itemizedlist> + <listitem> + <para> + it has been assigned the constant &null;. + </para> + </listitem> + <listitem> + <para> + it has not been set to any value yet. + </para> + </listitem> + <listitem> + <para> + it has been <function>unset</function>. + </para> + </listitem> + </itemizedlist> + </para> <sect2 id="language.types.null.syntax"> <title>Syntax</title> @@ -1819,6 +1839,9 @@ $var = NULL; </programlisting> </informalexample> + </para> + <para> + See also <function>is_null</function> and <function>unset</function>. </para> </sect2> Index: phpdoc/en/reference/var/functions/is-null.xml diff -u phpdoc/en/reference/var/functions/is-null.xml:1.2 phpdoc/en/reference/var/functions/is-null.xml:1.3 --- phpdoc/en/reference/var/functions/is-null.xml:1.2 Wed Apr 17 02:44:57 2002 +++ phpdoc/en/reference/var/functions/is-null.xml Mon Jun 10 05:15:37 2002 @@ -1,5 +1,5 @@ <?xml version="1.0" encoding="iso-8859-1"?> -<!-- $Revision: 1.2 $ --> +<!-- $Revision: 1.3 $ --> <!-- splitted from ./en/functions/var.xml, last change in rev 1.35 --> <refentry id="function.is-null"> <refnamediv> @@ -19,7 +19,12 @@ &false; otherwise. </para> <para> - See also <function>is_bool</function>, + See the <link linkend="language.types.null.syntax">&null;</link> type + when a variable is considered to be &null; and when not. + </para> + <para> + See also <link linkend="language.types.null.syntax">&null;</link>, + <function>is_bool</function>, <function>is_numeric</function>, <function>is_float</function>, <function>is_int</function>,