Re: Embedding foreach loops

[hessiess@xxxxxxxxxxxx]

>
> On Aug 11, 2009, at 12:13 AM, hessiess@xxxxxxxxxxxx wrote:
>
>> Do *NOT* get into the habit of outputting your HTML using echo or
>> print
>> statements, it becomes unmaintainable very quickly, use a templating
>> language, ether with a framework(recomended) or standalone.
>
>         This sounds interesting.  Could you expound on this a little
more and
> perhaps list a couple of the templates you mention?
>
> Thanks,
> Frank
>

There are a number of options for templating in PHP such as smarty, Dwoo
and PHP itself, though the syntax can be rather messy. Personally I just
use a simple find and replace macro system to expand custom short-hand
code into the more verbose PHP, then run it through exec and capture the
result to a variable with output buffering, the class folows:

<?php
class view
{
    var $str;

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
* Load in template file and expand macros into PHP
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
    function __CONSTRUCT($tplname)
    {
        $fh = fopen($tplname, 'r');
        $this->str = fread($fh, filesize($tplname));
        fclose($fh);

        $this->expand_macros();
    }

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 * Run the template and return a variable
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
    public function parse_to_variable($array = array())
    {
        extract($array);

        ob_start();
        eval($this->str);
        $result = ob_get_contents();
        ob_end_clean();
        return $result;
    }

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
* Expand macros into PHP
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
    private function expand_macros()
    {
    // Expand if macro
        $this->str = str_replace("<if", "<?php if", $this->str);
        $this->str = str_replace("<eif~>", "<?php endif;?>", $this->str);

    // Expand loop macro
        $this->str = str_replace("<loop", "<?php foreach", $this->str);
        $this->str = str_replace("<eloop~>", "<?php endforeach;?>",
$this->str);

    // Expand display macro
        $this->str = str_replace("<dsp", "<?php echo", $this->str);

    // Expand end tag macro
        $this->str = str_replace("~>", "?>", $this->str);

    // Add PHP close tag to exit PHP mode
        $this->str = "?>" . $this->str;
    }
}

------------------------------------------------------------------------
This loads template files like the folowing:
<form enctype="multipart/form-data" action="<dsp $upload_url ~>"
method="post">
    <p><input type="hidden" name="MAX_FILE_SIZE" value="90000000000" /></p>
    <p>Upload new file, max size <dsp $max ~>:</p>
    <p>
        <input name="uploaded_file" type="file" />
        <input type="submit" value="Send File" />
    </p>
</form>

<table>
    <tr>
        <th width="180px">Filename</th>
        <th width="60px">Link</th>
        <th width="90px">Size (KB)</th>
        <th width="50px">Delete</th>
    <tr>

    <loop ($files as $file): ~>

    <tr>
        <td><dsp $file['Name'] ~></td>
        <td><a href="<dsp $file['Path'] ~>">Link</a></td>
        <td><dsp $file['Size'] / 1000 ~></td>
        <td><a href="<dsp $file['d_url'] ~>">X</a></td>
    <tr>
    <eloop~>
</table>

---------------------------------------------------------------
And it can be used like this

$dialogue = new view("template/file_display.tpl");
$dialogue = $dialogue -> parse_to_variable(array(
    'upload_url' => $upload_url,
    'max' => $max_size,
    'files' => $files));

the $dialogue var now contains the compiled template, ready for displaying
or integrating into another template.


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