| Re: Undefined variable [message #181257 is a reply to message #181256] |
Thu, 25 April 2013 20:05   |
M. Strobel
Messages: 386
Registered: December 2011
Karma:
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Senior Member |
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Am 25.04.2013 20:23, schrieb Denis McMahon:
> On Thu, 25 Apr 2013 10:10:24 +0200, M. Strobel wrote:
>
>> I propose a new reading of "PHP Notice: undefined variable...", it goes:
>>
>> Hey, you are using a variable that is not defined. I will put a null
> ..........................................................^^^^
>
> *might*
>
>> into it.
>> Because I will make it easy for you.
>> If you don't care I won't either.
>
> + some lines:
> I may put some random value there instead.
> The double I use now might not be the string I use next.
> Or the integer I used last.
>
>> Maybe you expected the variable to contain something,
>> and your app logic will be screwed up.
>> It will be _a_lot_of_ work to find the error, but that's your
>> problem.
>
> (edited to be more complete and future proof)
>
ah, a new community project :-)
I thought (and read) the variables were defined after being accessed, but they are
not. Very strange decisions of the PHP makers. Console log:
> echo $a, PHP_EOL;
PHP Notice: Undefined variable: a in /usr/local/bin/myreadline.php(42) : eval()'d
code on line 1
> var_dump($a);
PHP Notice: Undefined variable: a in /usr/local/bin/myreadline.php(42) : eval()'d
code on line 1
NULL
> if ($a==0.0) echo "yes\n";
PHP Notice: Undefined variable: a in /usr/local/bin/myreadline.php(42) : eval()'d
code on line 1
yes
> var_dump($a);
PHP Notice: Undefined variable: a in /usr/local/bin/myreadline.php(42) : eval()'d
code on line 1
NULL
/Str.
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