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How to change css id in span element?

How to change a link's color based on a php variable?

I have a number of links on a page:

<p><a href="page1.php ">Page 1</a></p>
<p><a href="page2.php ">Page 2</a></p>
<p><a href="page3.php ">Page 3</a></p>
<p><a href="page4.php ">Page 4</a></p>

I want the link to be red if $nav has a value that corresponds to the page
number: If $nav = 1, then the page1.php link should be red; if $nav = 2,
then the page2.php link should be red, and so on.

This is how I'd normally code the html to make a red link:

<p><span id="red"><a href="page1.php ">Page 1</a></span></p>

But how do I check the value of $nav and insert the appropriate span id for
each link? Can I somehow make the span id a variable? How to I jump in and
out of php within a tag?

If $nav does not correspond with the link's page number, then the link
should remain the default color - which is blue:

<p><span id="blue"><a href="page1.php ">Page 1</a></span></p>

Any help is appreciated. Thanks in advance.
Jul 17 '05 #1
7 6005
On Wed, 04 Aug 2004 01:58:30 +0000, deko wrote:
How to change a link's color based on a php variable?

I have a number of links on a page:

<p><a href="page1.php ">Page 1</a></p>
<p><a href="page2.php ">Page 2</a></p>
<p><a href="page3.php ">Page 3</a></p>
<p><a href="page4.php ">Page 4</a></p>

I want the link to be red if $nav has a value that corresponds to the page
number: If $nav = 1, then the page1.php link should be red; if $nav = 2,
then the page2.php link should be red, and so on.

This is how I'd normally code the html to make a red link:

<p><span id="red"><a href="page1.php ">Page 1</a></span></p>

But how do I check the value of $nav and insert the appropriate span id for
each link? Can I somehow make the span id a variable? How to I jump in and
out of php within a tag?

If $nav does not correspond with the link's page number, then the link
should remain the default color - which is blue:

<p><span id="blue"><a href="page1.php ">Page 1</a></span></p>

Any help is appreciated. Thanks in advance.

alt.comp.homewo rk -----------> [this way]
I've only been back reading this group again for a week, and so far,
you've asked enough basic questions here for people to have written almost
your entire project. How about using php.net or google rather than being
spoon fed?

I'm all for helping where I can, but there's 'help', and there's 'do it
for me'.

Regards,

Ian

--
Ian.H
digiServ Network
London, UK
http://digiserv.net/

Jul 17 '05 #2
I noticed that Message-ID: <ap************ @newssvr27.news .prodigy.com>
from deko contained the following:
This is how I'd normally code the html to make a red link:

<p><span id="red"><a href="page1.php ">Page 1</a></span></p> id should be used where the element is unique. Otherwise use class. And
why have a link to itself?
But how do I check the value of $nav and insert the appropriate span id for
each link? Can I somehow make the span id a variable? How to I jump in and
out of php within a tag?
You need to adopt a more holistic approach to this one. :-)

If $nav does not correspond with the link's page number, then the link
should remain the default color - which is blue:

<p><span id="blue"><a href="page1.php ">Page 1</a></span></p>

I wouldn't use <span> here. Define your link colours in CSS. a:link,
a:visited etc. Again use a class if you want these links to be
different.

Check this out:

<?php
$links="";
$nav=$_SERVER['PHP_SELF'];
$pages=4;
for($i=1;$i<=$p ages;$i++){
if(strpos($nav, "$i")===fal se){
$links.="<a href=\"page$i.p hp\">Page $i</a><br>";
}
else{
$links.="<span style=\"color: red\">Page $i</span><br>";
}
}

?>
Save and include in all pages. echo $links wherever you need it.
Making it dynamic by counting the number of pages in the directory is
left as an A* exercise...
--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/
Jul 17 '05 #3
I noticed that Message-ID:
<pa************ *************** *@bubbleboy.dig iserv.net> from Ian.H
contained the following:
I've only been back reading this group again for a week, and so far,
you've asked enough basic questions here for people to have written almost
your entire project. How about using php.net or google rather than being
spoon fed?

I'm all for helping where I can, but there's 'help', and there's 'do it
for me'.


Ah, but if we do he'll probably fail because the tutor won't believe
it's his own work >:-)

--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/
Jul 17 '05 #4
> You need to adopt a more holistic approach to this one. :-)

Thanks for the reply Geoff. I'd say what I came up with is pretty holistic
:)

I put the entire nav list in a separate php file and then just used <?
include $leftnav; ?> in the page. Now the nav list is centralized and
easier to maintain. I had to send a variable with the url to process the
color changes - which work for named anchors in the same page (I thought I
would need JavaScript to do this).

I read somewhere that I should strip any html from $_SERVER['QUERY_STRING']
before using it... not sure about this...

<?php
function linkcolor($arg) {
$nav = $_SERVER['QUERY_STRING'];
if ( $arg == $nav )
{
return "grnlink";
}
else
{
return "blulink";
}
}
echo
"<p><span id=".linkcolor( "home").">< a href=index.php? home>Home
Page</a></span></p>
<p><span id=".linkcolor( "contact"). "><a
href=contact.ph p?contact>Conta ct</a></span></p>
<p><span id=".linkcolor( "services").">< a
href=services.p hp?services>Pro fessional Services</a></span></p>
<p><span id=".linkcolor( "software").">< a
href=software.p hp?software>Sof tware</a></span></p>
<p><span id=".linkcolor( "projmgt"). "><a href=services.p hp?projmgt>Proj ect
Management</a></span></p>
<p><span id=".linkcolor( "netprog"). "><a href=tech.php?n etprog>.NET
Programming</a></span></p>
<p><span id=".linkcolor( "viscount").">< a
href=stats.php? viscount>Viscou nt</a></span></p>
<p><span id=".linkcolor( "oxp")."><a href=software.p hp?oxp>Organize
XP</a></span></p>
<p><span id=".linkcolor( "tech01")." ><a href=tech.php?t ech01#tech01>Te ch
01</a></span></p>
<p><span id=".linkcolor( "tech02")." ><a href=tech.php?t ech02#tech02>Te ch
02</a></span></p>
<p><span id=".linkcolor( "tech03")." ><a href=tech.php?t ech03#tech03>Te ch
03</a></span></p>"
;
?>

Jul 17 '05 #5
I noticed that Message-ID:
<7X************ *****@newssvr21 .news.prodigy.c om> from deko contained the
following:
You need to adopt a more holistic approach to this one. :-)


Thanks for the reply Geoff. I'd say what I came up with is pretty holistic


My way was /much/ neater. :-)

--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/
Jul 17 '05 #6
> My way was /much/ neater. :-)

of course... we all like our own code best :) one problem I'm having with
my (unkempt) code is that I can't call it twice in the same page. For
example, let's say the page has a lot of stuff on it and the height is
2000px or more. The left nav list starts at the top of the page and has
about a dozen items:

this link
that link
other link
etc...

But when viewing content further down on the page, the menu list is not
visible. So I tried this in the leftnav div:

[top of page]
<? include $navlist; ?>
....
<p>nbsp;</p>
<p>nbsp;</p>
....
[middle of page]
<? include $navlist; ?>

The idea is to make the same left nav list available further down on the
page. The problem is that the second attempt to include the script results
in the following error:

Fatal error: Cannot redeclare linkcolor() (previously declared in
/home/clearpoi/public_html/cgi-bin/leftnav.php:2) in
/home/clearpoi/public_html/cgi-bin/leftnav.php on line 2

Is there a way to avoid this? Can I call the script without calling the
function?

Here is the script:

<?php
function linkcolor($arg) {
$nav = trim(strip_tags ($_SERVER['QUERY_STRING']));
if ( $arg == $nav )
{
return "grnlink";
}
else
{
return "blulink";
}
}
echo
"<p><span id=".linkcolor( "home").">< a href=index.php? home>Home
Page</a></span></p>
<p><span id=".linkcolor( "contact"). "><a
href=contact.ph p?contact>Conta ct</a></span></p>
<p><span id=".linkcolor( "services").">< a
href=services.p hp?services>Pro fessional Services</a></span></p>
<p><span id=".linkcolor( "software").">< a
href=software.p hp?software>Sof tware</a></span></p>
<p><span id=".linkcolor( "projmgt"). "><a href=services.p hp?projmgt>Proj ect
Management</a></span></p>
<p><span id=".linkcolor( "netprog"). "><a href=tech.php?n etprog>.NET
Programming</a></span></p>
<p><span id=".linkcolor( "oxp")."><a href=software.p hp?oxp>Organize
XP</a></span></p>
<p><span id=".linkcolor( "tech01")." ><a href=tech.php?t ech01#tech01>Te ch
01</a></span></p>
<p><span id=".linkcolor( "tech02")." ><a href=tech.php?t ech02#tech02>Te ch
02</a></span></p>
<p><span id=".linkcolor( "tech03")." ><a href=tech.php?t ech03#tech03>Te ch
03</a></span></p>"
;
?>
Jul 17 '05 #7
I noticed that Message-ID: <5j************ **@newssvr29.ne ws.prodigy.com>
from deko contained the following:
Is there a way to avoid this? Can I call the script without calling the
function?


Split them up. Include the function once, script many.

However, bear in mind what I said about id. It's supposed to be for
unique elements. Probably won't make much difference though unless you
want to access them with Javascript later on.

--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/
Jul 17 '05 #8

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