Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: "J.O. Aho" <user@example.net>
Newsgroups: comp.lang.php
Subject: Re: why is it always an endless loop?
Date: Mon, 16 Jun 2014 20:09:30 +0200
Lines: 42
Message-ID: <c08q6rFrneeU1@mid.individual.net>
References: <qw7xoz3y22k8.h8pla1goojcr$.dlg@40tude.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net 96hjHxshEP0dTPHDD5svIw9qOL//lFvqq5BoYzGVH8L51AD5DQ
Cancel-Lock: sha1:s3EkPxM6IEzi3AakV37KtFyR+LA=
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0
In-Reply-To: <qw7xoz3y22k8.h8pla1goojcr$.dlg@40tude.net>
Xref: csiph.com comp.lang.php:13886

On 16/06/14 18:06, richard wrote:
>
> $a="one"
> $b="one"
>
> while ($a=$b){echo "equal"; $b="two";)
>
> This simple code causes an endless loop.
> Why?

try this one instead and you see why:


$a="one"
$b="one"

while($a=$b) {
   echo "equal a='{$a}', b={$b}\n";
   $b="two";
}


> As soon as $b is changed, they are no longer equal, yet the loop continues.
> This does not happen in BASIC.

For BASIC lacks == and ===

> If it is placement, where then should $b be placed?

It's your compare which is incorrect, I don't remember how many times 
you have made the same mistake over and over again.


Don't complain about the answers in the thread, be happy that people 
haven't added you to filters to not see your posts.


-- 

  //Aho