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Re: include capturing wrong value [message #184664 is a reply to message #184660]

Tue, 14 January 2014 18:10

Daniel Pitts
Messages: 68
Registered: May 2012

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Member

On 1/14/14 9:50 AM, richard wrote:
> On Tue, 14 Jan 2014 17:23:25 +0000 (UTC), Denis McMahon wrote:
>
>> On Tue, 14 Jan 2014 11:56:16 -0500, richard wrote:
>>
>>> $go=$_GET['a'];
>>> if(empty($go)){$go=0;}
>>>
>>> if ($go>=60 and $go<=69) { include
>>> "http://mroldies.net/songs/19".$go.".html";}
>>> if ($go>="A" and $go<="Z") <<<<<<
>>> { include"http://mroldies.net/songs/".$go.".html";}
>>>
>>> if ($go==2){include "http://mroldies.net/radio/24hours.php";}
>>> if ($go==1){include"http://mroldies.net/test/index2.php";}
>>> if ($go==0){include "http://mroldies.net/home1.php";}
>>>
>>> Using this code I now get a warning stating that the file can't be
>>> found.
>>> "Zero" returns true for the marked line.
>>> I can see where that would be the case using or.
>>> But not AND!
>>
>> This is your fucked up comprehension of comparison.
>>
>>> Since "Zero" is less than "A" then the condition returns false.
>>
>> You are making an incorrect assumption about the way a string variable is
>> compared to the number 0. You are not comparing the string "Zero" with
>> the strings "A" and "Z", you are comparing the number 0 with the strings
>> "A" and "Z". If you check the relevant php documentation, you will
>> understand that the behaviour here is exactly as it is documented to be.
>>
>>> Why do I not get the same warning from the first match test?
>>> "zero" is less than 69 so that should return true.
>>
>> You are not comparing the string "zero", you are comparing the number 0.
>> You are only considering part of the test you are discussing in your
>> above statements. You need to consider the whole test. The behaviour
>> appears on inspection to be correct.
>
> Point noted and understood.
> Still, "AND" is the key. not "OR".
> Both must be true to return true.
> Since 0 (zero as string) ls not greater than "A" the condition should
> return false.
>

comparing a 0 to a string is always going to be true, regardless of
direction or string.

0<='A' is true
0>='Z' is true
0>='A' is true

However, what you *can* do is this:
if (is_string($go) && strlen($go)===1 && ctype_alpha($go))
{include"http://mroldies.net/songs/".$go.".html";}

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[Message index]

		include capturing wrong value By: Mr Oldies on Tue, 14 January 2014 16:56
		Re: include capturing wrong value By: Denis McMahon on Tue, 14 January 2014 17:23
		Re: include capturing wrong value By: Mr Oldies on Tue, 14 January 2014 17:50
		Re: include capturing wrong value By: Christoph Michael Bec on Tue, 14 January 2014 18:07
		Re: include capturing wrong value By: Daniel Pitts on Tue, 14 January 2014 18:10
		Re: include capturing wrong value By: Denis McMahon on Tue, 14 January 2014 18:25
		Re: include capturing wrong value By: Arno Welzel on Thu, 23 January 2014 17:50
		Re: include capturing wrong value By: Denis McMahon on Thu, 23 January 2014 18:05
		Re: include capturing wrong value By: Peter H. Coffin on Thu, 23 January 2014 21:56
		Re: include capturing wrong value By: Arno Welzel on Sat, 25 January 2014 09:20
		Re: include capturing wrong value By: Doug Miller on Tue, 14 January 2014 21:20

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