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Re: Using count() as an array index

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Norman Peelman wrote:
> On 06/18/2012 03:46 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.
>>
> 
>   People that aren't familiar with this are mostly people that simply 
> jump in to PHP without reading much documentation. Which is possible but 
> people should end up reading at one of the PHP mirrors at some point. In 
> this case:
> 
> http://us.php.net/manual/en/language.types.string.php
> 
> ...which explains all the different ways and reasons why.
> 
>>> 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.
>>
> 
>   It's a little more than possible... it was designed this way. It's not 
> a replacement for string concatenation, it is used (in this context) for 
> variable expansion within strings. If you don't want to use curly brace 
> syntax, then do it the long way, it's your choice. Me personally, I find 
> curly brace syntax much more readable than alot of '.'s and '/' escapes 
> like alot of people use.
> 
> 
> 
being an old C hacker I simply use (s)printf, lots of %s's and stick all 
the variables in a parameter list.

the nice thing about that is that - especially if using POST or GET 
variables you can counter PHPs execrable lack of string typing using 
'%d' and KNOW that whatever malformed crap is in the variables you will 
get a number or nothing at all.




-- 
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

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Thread

Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-15 12:51 -0600
  Re: Using count() as an array index Gregor Kofler <usenet@gregorkofler.com> - 2012-06-15 21:04 +0200
  Re: Using count() as an array index Denis McMahon <denismfmcmahon@gmail.com> - 2012-06-15 21:38 +0000
  Re: Using count() as an array index Chuck Anderson <cycletourist@invalid.invalid> - 2012-06-15 15:44 -0600
    Re: Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-16 11:56 -0600
      Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-16 14:44 -0400
        Re: Using count() as an array index Scott Johnson <noonehome@chalupasworld.com> - 2012-06-16 14:43 -0700
        Re: Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-17 07:57 -0600
          Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-17 10:27 -0400
            Re: Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-18 08:46 -0600
              Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-18 13:38 -0400
                Re: Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-19 09:03 -0600
                Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-19 11:27 -0400
        Re: Using count() as an array index Arno Welzel <usenet@arnowelzel.de> - 2012-06-18 09:46 +0200
          Re: Using count() as an array index Norman Peelman <npeelmandog@cfl.rr.com> - 2012-06-18 06:32 -0400
            Re: Using count() as an array index The Natural Philosopher <tnp@invalid.invalid> - 2012-06-18 12:24 +0100
            Re: Using count() as an array index Arno Welzel <usenet@arnowelzel.de> - 2012-06-18 19:43 +0200
              Re: Using count() as an array index "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-06-19 09:31 +0200
          Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-18 08:43 -0400
        Re: Using count() as an array index Christoph Becker <cmbecker69@gmx.de> - 2012-06-19 13:24 +0200
          Re: Using count() as an array index Jerry Stuckle <jstucklex@attglobal.net> - 2012-06-19 07:39 -0400
            Re: Using count() as an array index Christoph Becker <cmbecker69@gmx.de> - 2012-06-19 15:04 +0200
          Re: Using count() as an array index Martin Leese <please@see.Web.for.e-mail.INVALID> - 2012-06-19 09:14 -0600

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