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Subject Author Date
force users to different pages? Geoff Cox 03-21-2008
Posted by Chris F.A. Johnson on March 21, 2008, 5:02 pm
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 On 2008-03-21, Jonathan N. Little wrote:
> Geoff Cox wrote:
>> On Fri, 21 Mar 2008 09:40:41 -0400, "Jonathan N. Little"
>>
>>> A much simpler method would be a link randomizer.
>>>
>>> <?php
>>>
>>> $links = array('a.html','b.html','c.html','d.html');
>>> $last=count($links)-1;
>>> $link=$links[rand(0,$last)];
>>>
>>> echo "<a href=\"$link\">Mystery Tour</a>";
>>>
>>> ?>
>>
>> Thanks Joanathan,
>>
>> when I use the above I get
>>
>> Mystery Tour"; ?>
>>
>> I must be missing something?
>>
>
> 1) your server must support php
>
> 2) the page is named with a ".php" extension (normally for most server
> setups)
>
> 3) attention to the escaped quotes
>
> echo "<a href=\"$link\">Mystery Tour</a>";
> ^ ^
> or concatenate with single quotes
>
> echo '<a href="' . $link . '">Mystery Tour</a>';

Or use the safer and more portable printf instead of the
deprecated echo:

printf '<a href="%s">Mystery Tour</a>\n' "$link"

--
Chris F.A. Johnson <http://cfaj.freeshell.org>
===================================================================
Author:
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)

Posted by Michael Fesser on March 21, 2008, 5:25 pm
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 .oO(Chris F.A. Johnson)

> Or use the safer and more portable printf instead of the
> deprecated echo:

Deprecated? Safer? More portable? What are you talking about?

The only thing is that (s)printf() is much more flexible if you want to
embed multiple variables or complex expressions in a string. That's it.
For everything else print and echo are perfectly fine.

>printf '<a href="%s">Mystery Tour</a>\n' "$link"

For PHP you just have to add some (),; and please remove the quotes
around the $link variable - quoting a single variable is just stupid.

Micha

Posted by Chris F.A. Johnson on March 21, 2008, 5:46 pm
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On 2008-03-21, Michael Fesser wrote:
> .oO(Chris F.A. Johnson)
>
>> Or use the safer and more portable printf instead of the
>> deprecated echo:
>
> Deprecated? Safer? More portable? What are you talking about?

I was talking about something completely different. My apologies;
please ignore my post.

--
Chris F.A. Johnson <http://cfaj.freeshell.org>
===================================================================
Author:
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)

Posted by Bergamot on March 21, 2008, 6:11 pm
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Michael Fesser wrote:
> .oO(Chris F.A. Johnson)
>
>>printf '<a href="%s">Mystery Tour</a>\n' "$link"
>
> please remove the quotes
> around the $link variable - quoting a single variable is just stupid.

Aren't the quotes around the $link variable part of the <a> code, i.e.
for quoting the href attribute value?

--
Berg

Posted by Michael Fesser on March 21, 2008, 6:19 pm
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.oO(Bergamot)

>Michael Fesser wrote:
>> .oO(Chris F.A. Johnson)
>>
>>>printf '<a href="%s">Mystery Tour</a>\n' "$link"
>>
>> please remove the quotes
>> around the $link variable - quoting a single variable is just stupid.
>
>Aren't the quotes around the $link variable part of the <a> code, i.e.
>for quoting the href attribute value?

No. The same in PHP would be

printf('<a href="%s">Mystery Tour</a>\n', "$link");

The quotes for the href attribute are already in the first parameter,
the format string. The second parameter is just the value for the %s
placeholder. For PHP "$link" is a double-quoted string with an embedded
variable. But since there are no other characters in the string, the
quotes are pointless and just cause an unnecessary parsing overhead.

Micha

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