| Re: Using count() as an array index [message #178438 is a reply to message #178434] |
Mon, 18 June 2012 12:43   |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma:
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Senior Member |
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On 6/18/2012 3:46 AM, Arno Welzel wrote:
> Jerry Stuckle, 16.06.2012 20:44:
>
>> On 6/16/2012 1:56 PM, Martin Leese wrote:
>>> Chuck Anderson wrote:
>>>
>>>> You can not use a function call within a quoted string.
>>>>
>>>> You should use:
>>>>
>>>> echo $anArray[count($array)] . "\n";
>>>
>>> Thank you. I actually understood this
>>> explanation.
>>>
>>
>> Actually, you can easily use a function call within a quoted string, but
>> since it is not a simple variable, you need to use curly braces, i.e.
>>
>> <?php
>> $anArray[1] = "This is element one";
>> $anArray[2] = "This is element two";
>> $anArray[3] = "This is the last element";
>> echo "{$anArray[count($anArray)]}\n";
>> ?>
>>
>> prints "This is the last element" (without the quotes, of course).
>
> Please compare:
>
> $anArray[count($array)] . "\n";
>
> "{$anArray[count($anArray)]}\n";
>
> You see the difference? Your suggestion is longer (even whitespaces
> which can me omitted) and totally unreadable for people you are not
> familiar with this.
>
Yup, I used an extra pair of braces. Just because YOU don't like it
doesn't mean it's a bad idea.
>> Be aware, though - the typical array in PHP starts counting at 0, not 1.
>> So an array of 3 elements would be numbered 0, 1 and 2. In this case,
>> an element with an index of 3 (count($anArray)) is not set (and will
>> give a warning if you try to use it).
>
> ACK.
>
>> You need to get used to this idea; it's used throughout PHP.
>
> Just because something is possible does not mean you have to use it ;-)
> Curly braces should only be used for code blocks and not to replace
> string concatenation.
>
>
And just because YOU don't like it doesn't mean no one should use it.
--
==================
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Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
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