Re: [phplib] Inserting the correct template block From: Richard Archer (rha <email protected>)
Date: 07/27/01

At 9:01 PM +0100 26/7/01, Peter Bowyer wrote:

>I'm sure I'm not using the tempate class correctly and there's something
>I've missed - can someone help me please???

I notice you're only passing two arguments to set_block. I'm not aware
of a version of template.inc that has this behaviour, so I suspect
you're using a fairly old one (or a heavily modified one).

Your problem certainly highlights some problems with the way loadfile
determines whether or not a variable contains data that should be
loaded from disk! I'm starting to wonder whether the logic involved in
waiting until the last minute to load in a template file is more costly
than just loading it in from this->set_file and knowing it's there.

My test below runs fine with my version of template.inc, which you
can grab from:
http://mel01.juggernaut.com.au/templates/phplib/template.txt

The way I would go about this problem (note, I've simplified your
image tag template file somewhat, but the logic is the same):

::::::::::::::
conditionaltest1.tmpl
::::::::::::::
<HTML>
<BODY>
{IMG}
</BODY>
</HTML>

::::::::::::::
conditionaltest2.tmpl
::::::::::::::
<!-- BEGIN img_block -->
img src="images/{IMAGE}" {IMGSIZE}<br>
<!-- END img_block -->

<!-- BEGIN swf_block -->
swf src="images/{IMAGE}" {IMGSIZE}<br>
<!-- END swf_block -->

::::::::::::::
conditionaltest.php
::::::::::::::
<?php
    include("template.inc");

    $testdata = array("image1.gif", "movie2.swf", "movie3.swf", "image4.jpg");

    $t = new Template(".","comment");
    $t->debug=true;

    # load the page from conditionaltest1.tmpl into "page"
    # load image tag from conditionaltest2.tmpl into "img_tags"
    $t->set_file(array("page" => "conditionaltest1.tmpl",
                        "img_tags" => "conditionaltest2.tmpl"));

    # extract from "img_tags" the block named "img_block", leaving a
    # reference to {img_block_var}
    $t->set_block("img_tags", "img_block", "img_block_var");

    # extract from "img_tags" the block named "swf_block", leaving a
    # reference to {swf_block_var}
    $t->set_block("img_tags", "swf_block", "swf_block_var");

    # loop through our test data
    for ($cc = 0; $cc < count($testdata) ; $cc++) {
        # set variables with substitution data
        $t->set_var("IMAGE", $testdata[$cc]);
        $t->set_var("IMGSIZE", " height=10 width=10 "); # sample data only
        if (ereg("\.swf$", $testdata[$cc])) {
            $t->set_var("img_block_var", ""); # delete the image block
            $t->parse("swf_block_var", "swf_block"); # fill in the swf block
        }
        else {
            $t->set_var("swf_block_var", ""); # delete the swf block
            $t->parse("img_block_var", "img_block"); # fill in the img block
        }
        # append this image tag to the IMG block
        $t->parse ("IMG", "img_tags", true);
    }
    $t->parse("output", "page");
    $t->p("output");
?>

::::::::::::::
debug output
::::::::::::::
loadfile: loaded ./conditionaltest2.tmpl into img_tags
set_var: (with scalar) img_tags = '<!-- BEGIN img_block --> img src="images/{IMAGE}" {IMGSIZE}<br> <!-- END img_block --> <!-- BEGIN swf_block --> swf src="images/{IMAGE}" {IMGSIZE}<br> <!-- END swf_block --> '
get_var (with scalar) img_tags = '<!-- BEGIN img_block --> img src="images/{IMAGE}" {IMGSIZE}<br> <!-- END img_block --> <!-- BEGIN swf_block --> swf src="images/{IMAGE}" {IMGSIZE}<br> <!-- END swf_block --> '
set_var: (with scalar) img_block = ' img src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) img_tags = '{img_block_var} <!-- BEGIN swf_block --> swf src="images/{IMAGE}" {IMGSIZE}<br> <!-- END swf_block --> '
get_var (with scalar) img_tags = '{img_block_var} <!-- BEGIN swf_block --> swf src="images/{IMAGE}" {IMGSIZE}<br> <!-- END swf_block --> '
set_var: (with scalar) swf_block = ' swf src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) img_tags = '{img_block_var} {swf_block_var} '
set_var: (with scalar) IMAGE = 'image1.gif'
set_var: (with scalar) IMGSIZE = ' height=10 width=10 '
set_var: (with scalar) swf_block_var = ''
get_var (with scalar) img_block = ' img src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) img_block_var = ' img src="images/image1.gif" height=10 width=10 <br> '
get_var (with scalar) img_tags = '{img_block_var} {swf_block_var} '
get_var (with scalar) IMG = ''
set_var: (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> '
set_var: (with scalar) IMAGE = 'movie2.swf'
set_var: (with scalar) IMGSIZE = ' height=10 width=10 '
set_var: (with scalar) img_block_var = ''
get_var (with scalar) swf_block = ' swf src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) swf_block_var = ' swf src="images/movie2.swf" height=10 width=10 <br> '
get_var (with scalar) img_tags = '{img_block_var} {swf_block_var} '
get_var (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> '
set_var: (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> '
set_var: (with scalar) IMAGE = 'movie3.swf'
set_var: (with scalar) IMGSIZE = ' height=10 width=10 '
set_var: (with scalar) img_block_var = ''
get_var (with scalar) swf_block = ' swf src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) swf_block_var = ' swf src="images/movie3.swf" height=10 width=10 <br> '
get_var (with scalar) img_tags = '{img_block_var} {swf_block_var} '
get_var (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> '
set_var: (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> swf src="images/movie3.swf" height=10 width=10 <br> '
set_var: (with scalar) IMAGE = 'image4.jpg'
set_var: (with scalar) IMGSIZE = ' height=10 width=10 '
set_var: (with scalar) swf_block_var = ''
get_var (with scalar) img_block = ' img src="images/{IMAGE}" {IMGSIZE}<br> '
set_var: (with scalar) img_block_var = ' img src="images/image4.jpg" height=10 width=10 <br> '
get_var (with scalar) img_tags = '{img_block_var} {swf_block_var} '
get_var (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> swf src="images/movie3.swf" height=10 width=10 <br> '
set_var: (with scalar) IMG = ' img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> swf src="images/movie3.swf" height=10 width=10 <br> img src="images/image4.jpg" height=10 width=10 <br> '
loadfile: loaded ./conditionaltest1.tmpl into page
set_var: (with scalar) page = '<HTML> <BODY> {IMG} </BODY> </HTML> '
get_var (with scalar) page = '<HTML> <BODY> {IMG} </BODY> </HTML> '
set_var: (with scalar) output = '<HTML> <BODY> img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> swf src="images/movie3.swf" height=10 width=10 <br> img src="images/image4.jpg" height=10 width=10 <br> </BODY> </HTML> '
get_var (with scalar) output = '<HTML> <BODY> img src="images/image1.gif" height=10 width=10 <br> swf src="images/movie2.swf" height=10 width=10 <br> swf src="images/movie3.swf" height=10 width=10 <br> img src="images/image4.jpg" height=10 width=10 <br> </BODY> </HTML> '
img src="images/image1.gif" height=10 width=10
swf src="images/movie2.swf" height=10 width=10
swf src="images/movie3.swf" height=10 width=10
img src="images/image4.jpg" height=10 width=10

::::::::::::::
page output
::::::::::::::
<html>
<body>

img src="images/image1.gif" height=10 width=10 <br>

swf src="images/movie2.swf" height=10 width=10 <br>

swf src="images/movie3.swf" height=10 width=10 <br>

img src="images/image4.jpg" height=10 width=10 <br>

</body>
</html> 

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