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Re: evaluating a null value in an array [message #173834 is a reply to message #173827]

Sat, 07 May 2011 16:35

Gregor Kofler
Messages: 69
Registered: September 2010

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Am 2011-05-07 13:36, Jerry Stuckle meinte:
> On 5/7/2011 7:27 AM, bill wrote:
>> I have an array of values, one of which might be null.
>>
>> This statement fails
>> if ( ($dos <= $insInfo[3]) or($dos == '0000-00-00'))
>>
>> with the error:
>> Notice: Undefined offset: 3 in /var/www/MP2010-v2/classes/cDollar.php on
>> line 237
>>
>> when $insInfo[3] is NULL.
>>
>> I figured I could shortcut the evaluation with:
>>
>> if ( ( is_null($insInfo[3])) or($dos <= $insInfo[3]) or($dos ==
>> '0000-00-00'))
>>
>> but I get the same error.
>>
>> I sure would appreciate:
>> knowing why I get the error, and
>> a suggestion on how to evaluate this value.
>>
>> bill
>
> Is it null, or is it not set? There is a difference!

Which isset() won't spot.

http://php.net/manual/de/function.isset.php

Gregor

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[Message index]

		evaluating a null value in an array By: bill on Sat, 07 May 2011 11:27
		Re: evaluating a null value in an array By: Jerry Stuckle on Sat, 07 May 2011 11:36
		Re: evaluating a null value in an array By: Gregor Kofler on Sat, 07 May 2011 16:35
		Re: evaluating a null value in an array By: dougatmilmacdotcom on Sat, 07 May 2011 23:46
		Re: evaluating a null value in an array By: Thomas 'PointedEars' on Sun, 08 May 2011 11:56
		Re: evaluating a null value in an array By: Gregor Kofler on Sun, 08 May 2011 18:18
		Re: evaluating a null value in an array By: bill on Sat, 07 May 2011 17:50
		Re: evaluating a null value in an array By: Denis McMahon on Sat, 07 May 2011 15:30
		Re: evaluating a null value in an array By: Gregor Kofler on Sat, 07 May 2011 16:34

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