Using a parameter in an XSL:IF element

[Stu_Rogers]

I hope this is possible - I'm pretty sure it is but I'm new to all this so can't figure it out.

I am using PHP's xslt_process to merge and display an XML and XSL document.

My XML is like...

<page number="1">
<content>this is page 1</content>
</page>
<page number="2">
<content>this is page 2</content>
</page>
<page number="3">
<content>this is page 3</content>
</page>

I want to pass a parameter from PHP to XSL to determine which page gets displayed.

I know how to pass a parameter and display it like this...

<xsl:param name="page" />
<xsl:value-of select="$page" />

But how do I use the parameter within an if statement? I'm looking for something like..

<xsl:if test="$page = 1">

(but that doesn't work!)

Any help or pointers appreciated - many thanks.

[Alternative Future]

Not sure if it will work but creating a variable called internalPageVar that holds the value of your parameter sent from PHP the inwardPageVar like so:

<xsl:variable name="internalPageVar" select="inwardPageVar"/>

Then use

<xsl:choose>
<xsl:when test="$internalPageVar = '1'">

</xsl:when>
<xsl:when ...>
</xsl:when>
<xsl:otherwise>
<xsl:otherwise>
</xsl:choose>

Might work remember that XSL is useless with creating and doing things on the fly - but I am not fully sure of your intention.

-George

[Stu_Rogers]

My intention is to keep one XML document to hold data used throughout my website. Then use PHP to determine which data gets included where, for example page.php?number=3. I appreciate that having multiple XML documents would solve this, but I was hoping to do it with one.

I haven't yet tried the code you suggest but what is "inwardPageVar" and "internalPageVar"? Are they names you have made up or names that XSL will understand. (Google doesn't know them!).

Thanks.

[Alternative Future]

Stu_Rogers,

>>what is "inwardPageVar" and "internalPageVar"?

Yeah just names I made up to show a better meaning for them i.e inwardPageVar was you incoming parameter and internalPageVar was the local variable to the page.

-George

[Stu_Rogers]

Sorry Alternative Future, I see what you are doing now - using xsl:variable to assign my PHP parameter to an internal variable.

I have tried this but no luck. I must admit at this point, that I have just realised the code I provided in my first post does work...

<xsl:if test="$page = 1">
do some tranformation
</xsl:if>

But it doesn't solve my problem because it doesn't reference the attribute of my XML page tag, <page number="1">

I guess I'm just trying to run before I can walk and will need to do another few weeks of reading before I have the skills to target an attribute in this way.

[Alternative Future]

Stu_Rogers,

Not too sure on params but where you assign your local variable it should reference the xml something like:

<xsl:variable name="page" select="page/@number"/>
I am using xsl:variables as I am more sure of them ;-)

number is at the root of the page element and should be reference with the @ sign

Lets know if that assists any

-George

[danseagrave]

Hi,

I have been using something similar to

<xsl:choose>
<xsl:when test="$myvar='a'">
do something
</xsl:when>
<xsl:when test="myvar='b'">
do something else
</xsl:when>
</xsl:choose>

don't know it it will work any better/with parameters. I know I used params at some point - but it was some time ago and i forget now.

-- oops - just spotted the original reply, *shame*