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Re: Using count() as an array index

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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.

> 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.


-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de

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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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