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Re: integer and string what's the difference ? [message #175861 is a reply to message #175860]

Tue, 01 November 2011 15:23

richard

Messages: 213
Registered: June 2013

Karma:

Senior Member

On Tue, 1 Nov 2011 06:19:01 -0700 (PDT), gaoqiang wrote:

> 1 <?php
> 2 require_once("config.php");
> 3 $now=time();
> 4 $value="abcd";
> 5 $key="1234";
> 6
> 7 $mem_server="localhost";
> 8 $mem_port=11211;
> 9 $memc=new Memcached;
> 10 $memc->addServer($mem_server,$mem_port);
> 11 $memc->set($key,$value);
> 12 $keys=array();
> 13 array_push($keys, 1234);
> 14 $rsts=$memc->getMulti($keys);
> 15 var_dump($rsts);
> 16 ?>
>
> line 13: when using array_push($keys,"1234"),
> it works fine. but not with 1234.
>
> when using $memc->get,not getMulti, 1234 and
> "1234" are the same.
>
> I think this is a bug. any idea ?

An integer is any numeric value.
Where some will argue that an integer is any whole number like 0 or 1.
But is "1" the same as 1? No it is not.

I once came across a web page that asked this simple question:
When does '1'+'1'='11'?
Notice the quotes.
in computer math 1+1=2.
But '1'+'1'='11'

In your code above, check line 13.
In line 5 you defined $key="1234".
In line 13, you are treating this value as an integer, not a string as you
defined it.
The quotes define the value as a string.
Try using the quotes around 1234 and see what happens.

In BASIC, a statement like a$="hello"+world would generate an error.
So to be correct it would have to be like this:
a$="hello"+str$(world)
str$() converts an integer to a string.

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[Message index]

		integer and string what's the difference ? By: gaoqiang on Tue, 01 November 2011 13:19
		Re: integer and string what's the difference ? By: richard on Tue, 01 November 2011 15:23
		Re: integer and string what's the difference ? By: Doug Miller on Tue, 01 November 2011 17:25
		Re: integer and string what's the difference ? By: Denis McMahon on Tue, 01 November 2011 18:48
		Re: integer and string what's the difference ? By: Balazs Nadasdi on Tue, 01 November 2011 19:07
		Re: integer and string what's the difference ? By: Denis McMahon on Tue, 01 November 2011 19:23
		Re: integer and string what's the difference ? By: Denis McMahon on Tue, 01 November 2011 23:03
		Re: integer and string what's the difference ? By: Denis McMahon on Tue, 01 November 2011 23:36

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