Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:70175
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.214.170 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <52875587.6050000@marc-bennewitz.de>
References: <CAGa2bXY4mS27qAfD6U03pxFyRNyK1AAowY3D0MxeqcjNQSKqRw@mail.gmail.com>
	<527DF228.1080108@sugarcrm.com>
	<CAGa2bXbqR7Cg_pmq0VnZhMHzXfTrR7ve1yYKoeiEf88Oght2tg@mail.gmail.com>
	<416659913.20131110035553@cypressintegrated.com>
	<CAGa2bXYf-CxH+WjOktvYRRNnb_3spNPg9=+SrHNC_bGUe=PHFQ@mail.gmail.com>
	<127298508.20131110042057@cypressintegrated.com>
	<CAGa2bXZtTqsCARTEG5-GArjn9Qdt2sHAFjhVYMLGeVVn5Nbq_Q@mail.gmail.com>
	<97776909.20131110045342@cypressintegrated.com>
	<CAGa2bXYm+2SfF932EF0bht6h1eU6HOhM-7c43q4H0NMP6znQDg@mail.gmail.com>
	<527FDE61.70102@gmail.com>
	<346085145.20131110145938@cypressintegrated.com>
	<52812873.70406@gmail.com>
	<1755993748.20131111140340@cypressintegrated.com>
	<CAGa2bXZwKPdeEi8GOoNCM==kyQO5cEUg7M+biafb=3jfbXw6=w@mail.gmail.com>
	<52875587.6050000@marc-bennewitz.de>
Date: Sat, 16 Nov 2013 12:16:43 -0500
Message-ID: <CAGrsWWJywiOExzdAahDXiXJ8q=C6YCcYm=PxUMph8WO+nVCJ6g@mail.gmail.com>
To: Marc Bennewitz <php@marc-bennewitz.de>
Cc: Developers List PHP Mailing <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a11348500980c1204eb4e7ac5
Subject: Re: [PHP-DEV] [RFC] Comparison and conversion inconsistency - need
 more info
From: william.a.bartlett@gmail.com (William Bartlett)

--001a11348500980c1204eb4e7ac5
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

On Sat, Nov 16, 2013 at 6:22 AM, Marc Bennewitz <php@marc-bennewitz.de>wrot=
e:

> Hi,
>
> What about the following PHP logic:
> var_dump(null =3D=3D 0); // TRUE
> var_dump(null < -1); // TRUE
> var_dump(null > -1); // FALSE
>
> How can you explain that ?
>
> Greetings
> Marc
>
>
false =3D=3Dfalse // TRUE
false < true // TRUE
false > true // FALSE


It's right here:
http://www.php.net/manual/en/language.operators.comparison.php.  Halfway
down the page, type of op 1 is null, op 2 is anything.

--
William Bartlett
College of Engineering | Cornell University '14
240-432-5189






> Am 15.11.2013 00:03, schrieb Yasuo Ohgaki:
> > Hi all,
> >
> > On Tue, Nov 12, 2013 at 4:03 AM, Sanford Whiteman <
> > swhitemanlistens-software@cypressintegrated.com> wrote:
> >
> >>> You don't have to think the current documentation is awful to find wa=
ys
> >>> of improving it.
> >>
> >> Sure, go for it!
> >
> >
> > I wrote my misunderstanding to my personal blog. It seems many people
> > misunderstand it, just like me :)
> >
> > Any improvement/correction?
> > min() manual page is better to be updated. I'll add min() example blow =
to
> > min() manual
> > page also.
> >
> > Index: operators.xml
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > --- operators.xml (=E3=83=AA=E3=83=93=E3=82=B8=E3=83=A7=E3=83=B3 332115=
)
> > +++ operators.xml (=E4=BD=9C=E6=A5=AD=E3=82=B3=E3=83=94=E3=83=BC)
> > @@ -1262,7 +1262,7 @@
> >        <row>
> >         <entry><type>bool</type> or <type>null</type></entry>
> >         <entry>anything</entry>
> > -       <entry>Convert to <type>bool</type>, &false; &lt; &true;</entry=
>
> > +       <entry>Convert to <type>bool</type> both side, &false; &lt;
> > &true;</entry>
> >        </row>
> >        <row>
> >         <entry><type>object</type></entry>
> > @@ -1298,8 +1298,28 @@
> >       </tbody>
> >      </tgroup>
> >     </table>
> > +
> >     <para>
> >      <example>
> > +     <title>Boolean/null comparison</title>
> > +     <programlisting role=3D"php">
> > +<![CDATA[
> > +<?php
> > +// Bool and null are compared as bool always
> > +var_dump(1 =3D=3D TRUE);  // TRUE - same as (bool)1 =3D=3D TRUE
> > +var_dump(0 =3D=3D FALSE); // TRUE - same as (bool)0 =3D=3D FALSE
> > +var_dump(100 < TRUE); // FALSE - same as (bool)100 < TRUE
> > +var_dump(-10 < FALSE);// FALSE - same as (bool)-10 < FALSE
> > +var_dunp(min(-100,-10, NULL, 10, 100); // NULL - (bool)NULL < (bool)-1=
00
> > is FALSE < TRUE
> > +?>
> > +]]>
> > +     </programlisting>
> > +    </example>
> > +   </para>
> > +
> > +
> > +   <para>
> > +    <example>
> >       <title>Transcription of standard array comparison</title>
> >       <programlisting role=3D"php">
> >  <![CDATA[
> >
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

--001a11348500980c1204eb4e7ac5--