An if statement based on what the url contains

[gameon]

Hi, usually I use ColdFusion, but at the mo it has to be php.

For navigation - I usually use the following to make naviagtion maintainance easier.

if the url contains "a string"

do this:

else do this:

Can someone help me do this with php?

Cheers if you can illuminate me...

an example to change an image would be:

<if the url contains &quot;/help&quot;>help<else>nothelp</if>.gif

M@)

 

[KarveR]

It could be a long list of if's if you really go mad, switch is fatser and easier to manage :

<?php
// search the url for help test or admin
switch ($searchword) {
case help:
preg_match(&quot;/$searchword/i&quot;,$REQUEST_URI);
print &quot;found HELP in URL&quot;;
break;

case test:
preg_match(&quot;/$searchword/i&quot;,$REQUEST_URI);
print &quot;found TEST in URL&quot;;
break;

case admin:
preg_match(&quot;/$searchword/i&quot;,$REQUEST_URI);
print &quot;found ADMIN in URL&quot;;
break;
}
?> ______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.

 

[sleipnir214]

PHP provides the information need in an associative array. In versions earlier than 4.1.0, the array is called $_HTTP_SERVER_VARS. In 4.1.0 and higher, both that array and the array is $_SERVER are available. $_HTTP_SERVER_VARS has been deprecated in favor of $_SERVER.

If you have the PHP runtime configuration directive register_globals set to on, then the values will also be available as separate variables.

(for more information on this and the other arrays available to you, I direct your attention to

http://www.php.net/manual/en/language.variables.predefined.php

)

You need to look at the values that are provided in the arrays $_SERVER and $_GET.



To match part of the string, you can use the regular expression functions. (direct your browser to

http://www.php.net/manual/en/ref.pcre.php

for full information).


To match your substring, you might use:

if (preg_match (&quot;/\/help/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])
{
print &quot;got help&quot;;
}
else
{
print &quot;got no help&quot;;
}
______________________________________________________________________
Don't say thanks. Just award stars.
______________________________________________________________________

 

[gameon]

Hi, and thanks so much for your help.

Just to confirm, I will be using this to dynamically name an image.

In cold fusion, to dynamically output (server side) the image to welcome_home.gif or welcome_nothome.gif I would do:

welcome<cfif statement>_home<cfelse>_nothome</cfif>.gif

when you use print, is that the same?

M@)

 

[sleipnir214]

PHP does not operate as meta-tags. It's more procedural.

Here's a functional equivalent in PHP. This is my own codeing style -- I'm sure KarveR's will differ somewhat typographically, but will likely be the same at least in the use of looping constructs.

<?php

print &quot;welcome&quot;;
if (statement)
{
print &quot;_home&quot;;
}
else
{
print &quot;_nothome&quot;;
}
print &quot;.gif&quot;;

?> ______________________________________________________________________
Don't say thanks. Just award stars.
______________________________________________________________________

 

[gameon]

Can I rewrite this as:

<?php print &quot;welcome&quot;;if (statement){print &quot;_home&quot;;}else{
print &quot;_nothome&quot;;}print &quot;.gif&quot;;?>

M@

 

[gameon]

Is there a reason for this not to work?

<a href=&quot;/jogme/registration/&quot;><img src=&quot;/jogme/images/left_nav/<?php if (preg_match (&quot;/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;]){print &quot;down/registration.gif&quot;;}else{print &quot;up/registration.gif&quot;;}?>.gif&quot; border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;<?php if (preg_match (&quot;/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;]){print &quot;registration&quot;;}else{print &quot;&quot;;}?>&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/jogme/images/left_nav/over/over_registration.gif',1)&quot;>

M@

 

[KarveR]

I like to keep things spaced abit for ease of debugging.
You have missed the second bracket on each of the preg_match statements.

<a href=&quot;/jogme/registration/&quot;>
<img src=&quot;/jogme/images/left_nav/

<?php
if (preg_match (&quot;/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;down/registration.gif&quot;;
}else{
print &quot;up/registration.gif&quot;;
}
?>

.gif&quot; border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;

<?php
if (preg_match (&quot;/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;]))
{
print &quot;registration&quot;;
}else{
print &quot;&quot;;
}
?>

&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/jogme/images/left_nav/over/over_registration.gif',1)&quot;> ______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.

 

[gameon]

Ahh yes, much clearer.

Thank you soo much. If any of you helpful people ever need some flash stuff (that I am suitable for), corp or otherwise please let me know:
(

http://www.tautester.com

- latest)

matt@3ainteractive.com

M@)

 

[gameon]

Hi again,
when I put the code in the page, it just wrote it out:

http://www.3ainteractive.com/php.gif

(4K)

Using the code:
--------------------------------------------------------

<a href=&quot;/~mattg/registration/&quot;>
<img src=&quot;/~mattg/images/left_nav/

<?php
if (preg_match (&quot;/\/~mattg/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;down/registration.gif&quot;;
}else{
print &quot;up/registration.gif&quot;;
}
?>

.gif&quot; border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;

<?php
if (preg_match (&quot;/\/~mattg/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;]))
{
print &quot;registration&quot;;
}else{
print &quot;&quot;;
}
?>

&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/~mattg/images/left_nav/over/over_registration.gif',1)&quot;>
</a>

-----------------------------------------------

Have I not closed the comments properly?

M@

 

[welshtroll]

In this section:
print &quot;down/registration.gif&quot;;
}else{
print &quot;up/registration.gif&quot;;}?>
.gif&quot; border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot;.

The page will be looking for the image registration.gif.gif.

Remove the additional '.gif' to sort this.
'Does my thumb look big in this?'

elshtroll

 

[gameon]

Fixed that, but it's still not having any of it.

To make it clearer, I have put the whole statement in:


----------------------------------------------------

<?php
if (preg_match (&quot;/\/~mattg/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;<img src=&quot;/~mattg/images/left_nav/down/registration.gif border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;registration&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/~mattg/images/left_nav/over/over_registration.gif',1)&quot;>&quot;;
}else{
print &quot;<img src=&quot;/~mattg/images/left_nav/down/registration.gif border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;registration&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/~mattg/images/left_nav/over/over_registration.gif',1)&quot;>&quot;;
}?>
------------------------------------------------


I'll keep trying to fiddle...

M@

 

[welshtroll]

PHP will not like the double quotes in the print statement.

The line:
print &quot;<img src=&quot;/~mattg/images/left_nav/down/registration.gif border=&quot;0&quot; width=&quot;173&quot; height=&quot;13&quot; alt=&quot;Registration&quot; name=&quot;registration&quot; onMouseOut=&quot;MM_swapImgRestore()&quot; onMouseOver=&quot;MM_swapImage('registration','','/~mattg/images/left_nav/over/over_registration.gif',1)&quot;>&quot;;

should read:
print &quot;<img src=\&quot;/~mattg/images/left_nav/down/registration.gif\&quot; border=\&quot;0\&quot; width=\&quot;173\&quot; height=\&quot;13\&quot; alt=\&quot;Registration\&quot; name=\&quot;registration\&quot; onMouseOut=\&quot;MM_swapImgRestore()\&quot; onMouseOver=\&quot;MM_swapImage('registration','','/~mattg/images/left_nav/over/over_registration.gif',1)\&quot;>&quot;;

The one in Bold was missing.
The double quotes makes php believe that it's the end of the print function.

'Does my thumb look big in this?'

elshtroll

 

[welshtroll]

Sorry should have said.

each double quote &quot; has to have a \ infront of it, when it's within the print quotes.
'Does my thumb look big in this?'

elshtroll

 

[gameon]

The following does work:


<?php
if (preg_match (&quot;/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;bosh&quot;;
}else{
print &quot;dosh&quot;;
}?>


but this doesn't.

Are their rules about what can go in the expression?

<?php
if (preg_match (&quot;/\/~mattg/\/registration/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;bosh&quot;;
}else{
print &quot;dosh&quot;;
}?>

What about having nested &quot;&quot;, like above?

I think I need me a book...

M@

 

[gameon]

I have finnaly got it - nearly - with lost of help.

But the URL detect is not working...

<?php
if (preg_match (&quot;/\/home/&quot;, $_SERVER[&quot;REQUEST_URI&quot;])){
print &quot;yes&quot;;
}else{
print &quot;no&quot;;
}?>

The above outputs no, even when I am in a url that contains the string: &quot;/home/&quot;

Is the syntasx correct?

M@

 

[KarveR]

I couldn't get anything out of $_SERVER[&quot;REQUEST_URI&quot;] on php 4.2.0 so I guess thats one of the things that may or may not be supplied by the server in later versions :-(

As the manual page says:
$_SERVER
Variables set by the web server or otherwise directly related to the execution environment of the current script. Analogous to the old $HTTP_SERVER_VARS array (which is still available, but deprecated).

Check if you can get this from $HTTP_SERVER_VARS[REQUEST_URI], if so you should be in business. ______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.

 

[sleipnir214]

KarveR, I'm running PHP 4.2.1, and $_SERVER[&quot;REQUEST_URI&quot;] is available and works as advertised. ______________________________________________________________________
My God! It's full of stars!
______________________________________________________________________

 

[KarveR]

Guess *I* need a slight upgrade then. ______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.