"for" Function Won't Output Loop Within Class/Template Structure

[Volitics]

The HtmlTemplate.class.php page below is the class that processes the HTML and inserts the $var variables into the {$var} tags on the template page. The CreateInstancePage.php page below incorporates the HtmlTemplate class, identifies the template to be used, extracts the data from the database, sets the parameters for the {$var} tages on the TemplatePage.inc.php page, and then creates the page.

I got the concept for the code below from the book "PHP Advanced For The World Wide Web" written by Larry Ullman. It all works fine except for one little hitch - the $Page->SetParameter ("COUNTY", "$Reference"); on the CreateInstancePage.php below won't iterate through the "for" loop. It will output one time and that's it - it won't loop through and output any more.

I'm just now starting to learn about classes and templates. As far as I can tell this is a "nested" loop or array problem. That is, the "for" loop on the CreateInstancePage.php is nested within the "foreach ($this->Parameters as $Key => $Value)" loop within the CreatePage function on the HtmlTemplate.class.php page. A nexted loop may not be possible with PHP.

Can anyone spot the problem and provide insight about how the problem might be solved?

//---------- HtmlTemplate.class.php -------------------

class HtmlTemplate {

// Set the attributes or properties.
var $Template;
var $Html;
var $Parameters = array();

function IdentifyTemplate ($Template) { // This function sets which template will be used.
	$this->Template = $Template;
}

function SetParameter ($Variable, $Value) { // This function sets the particular values.
	$this->Parameters[$Variable] = $Value;
}

function CreatePage () { // This function does the bulk of the work.
	$this->Html = implode ("", (file($this->Template))); // Read the template into an array, then create a string.

	foreach ($this->Parameters as $Key => $Value) { // Loop through all the parameters and set the variables to values.
		$TemplateName = "{" . $Key . "}";
		$this->Html = str_replace ($TemplateName, $Value, $this->Html);
	}    
	echo $this->Html;
}
}


//------------ CreateInstancePage.php

require_once "HtmlTemplate.class.php"; // Include the class.
$Page = new HtmlTemplate(); // Create an instance.
$Page->IdentifyTemplate ("TemplatePage.inc.php"); // Identify the template.
$Page->SetParameter ("DIRECTORY_PAGE", "$PHP_SELF");	
require_once "../quote/conf/config.inc.php";
$TableName = "State"."$State";
$Result = mysql_query("SELECT * FROM $TableName", $db_connection);
for($i=17; $i<=mysql_num_fields($Result); $i++){
$Reference = mysql_field_name($Result, $i);//Works ok here. Loops through and will echo (62) counties.
$Page->SetParameter ("COUNTY", "$Reference");//Here's where the problem is. Won't loop through and output.
}
$Page->CreatePage(); // Send the page to the browser. 
mysql_close( $db_connection );


//------------- TemplatePage.inc.php

<form method="post" action="{DIRECTORY_PAGE}">
<select name="County">
<option value="{COUNTY}">{COUNTY}</option>//Needs to iterate or loop through (62) counties.
</select>
<input type="hidden" name ="State" value="">
<input type="submit" name="SetCountyState" value="Click Here To Proceed">
</form>

Thank you in advance.

Volitics

[Weedpacket]

Nested loops are certainly possible in PHP. And indeed, the loop you're saying doesn't run is running.

Your problem is you're setting the same property over and over again.
The loop's effectively going

$this->Parameters['COUNTY'] = "This"; 
$this->Parameters['COUNTY'] = "That"; 
$this->Parameters['COUNTY'] = "The other"; 
$this->Parameters['COUNTY'] = "Another County"; 

...and it's no surprise that at the end of the loop you've only got one county.

Should $this->Parameters['COUNTY'] itself be an array?

[Volitics]

Weedpacket;

Thank you for your response.

I've tried inserting "$this->Parameters['COUNTY']" in place of just "COUNTY". It still won't work.

If I put an echo statement and then the $Reference variable, like so: echo $Reference; , it will loop through all of the counties and output each of the counties. So I know that the loop is working.

Actually, the $Page->SetParameter doesn't print out anything on the TemplatePage.inc.php. It looks like it should loop through and replace the $Reference variable each time that it loops through but it won't.

I ran into the same exact problem a few months ago - I couldn't figure it out then, either.

I can make it run okay without a template. I may end up doing it that way for now.

require_once "HtmlTemplate.class.php"; // Include the class.
$Page = new HtmlTemplate(); // Create an instance.
$Page->IdentifyTemplate ("TemplatePage.inc.php"); // Identify the template.
$Page->SetParameter ("DIRECTORY_PAGE", "$PHP_SELF");    

require_once "../quote/conf/config.inc.php";
$TableName = "State"."$State";
$Result = mysql_query("SELECT * FROM $TableName", $db_connection);
for($i=17; $i<=mysql_num_fields($Result); $i++){
$Reference = mysql_field_name($Result, $i);
echo $Reference; //Note. This works! It loops through and prints out all of the counties.
//But the code snippet just below won't work - it won't loop at all.
$Page->SetParameter ("$this->Parameters['COUNTY']","$Reference");
	}
$Page->CreatePage(); // Send the page to the browser.
mysql_close( $db_connection );

Thanks again.

Volitics