| Re: Using count() as an array index [message #178422 is a reply to message #178420] |
Sat, 16 June 2012 18:44   |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma:
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Senior Member |
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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($anArray)]}\n";
?>
prints "This is the last element" (without the quotes, of course).
Be aware, though - the typical array in PHP starts counting at 0, not 1.
So an array of 3 elements would be numbered 0, 1 and 2. In this case,
an element with an index of 3 (count($anArray)) is not set (and will
give a warning if you try to use it).
You need to get used to this idea; it's used throughout PHP.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
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