Re: [PHP] PHP is Zero

Sorry missed to post list as well

> Hi Daniel,
> here is wild goose
>
> i assume you have 3 x =
> in your "problem" formulation
> which could possibly result in the akward standard C mixup;
> the rightmost = first parsed and resulting in an ASSIGMENT to the variable 
> with that value,
> the comes the parsing of == which is the equivalence test, and see; the 
> variable is
> the same since it was just assigned that value; if this theory is correct 
> you would
> get TRUE regardless what number is following :)
> /g
>
> ----- Original Message ----- 
> From: "BUSCHKE Daniel" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, June 13, 2013 9:59 AM
> Subject: [PHP] PHP is Zero
>
>
>> Hi all,
>> I want to start a discussion about a PHP behaviour that drives me crazy 
>> for years. For the beginning I would like you to guess what the result of 
>> the following snippet will be:
>>
>> var_dump('PHP' == 0);
>>
>> I know the difference of == and === but the result was unexcpected for 
>> me. And I hope it is also for you. The result is simply "true". Why is it 
>> true? I guess this happens because of the conversion from 'PHP' to a 
>> number which will be 0 in PHP. And of course 0 equals 0. There are 
>> several points that I just want to drop into this mailinglist to discuss 
>> about:
>>
>> 1. Why? :)
>> 2. Why is PHP converting the String into a Number instead of converting 
>> the Number into a String? (If my guess concerning the behaviour is 
>> correct)
>> 3. Why is PHP throwing data away which has the developer explicit given 
>> to the interpreter?
>> 4. Why does var_dump(0 == 'PHP'); has the same result as the snippet 
>> above? This meens that the equal operator is not explictly implemented in 
>> the string or integer?
>> 5. Thats a bug I have opend: https://bugs.php.net/bug.php?id=51739 where 
>> I also had the same problems because "8315e839da08e2a7afe6dd12ec58245d" 
>> was converted into float(INF) by throwing everything starting from 
>> "da08.." away.
>>
>> I am using PHP since the year 2000. This means I have 13 years of 
>> experience in PHP and I really would like you to NOT just answer "works 
>> as designed". I know it works as designed but I want to discuss the 
>> design. Also I know that the "fuzzy" behaviour of type conversion is a 
>> main feature of PHP. I guess this is one point which makes PHP that 
>> successfull. But - in my opinion - the described behaviour is to fuzzy 
>> and just confuses developers.
>>
>> Best Regards
>> Daniel Buschke
>>
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>