Quirky Snippet Behavior

<?php
// load necessary modules
$modx->runSnippet('load_mootools');
$modx->runSnippet('load_squeezebox');

$output = '';

// generate paths
$assets = $modx->getOption('base_url').'assets/';
$pl_url = $assets.'photolab/';
$pl_path = $modx->getOption('base_path').'assets/photolab/';

// include image code
// (moved to external file for easier editing)
require($pl_path.'processors/image.inc.php');

return $output;
?>

<?php

	// include necessary functions & libraries
	require_once($pl_path.'config.inc.php');
	require_once($pl_path.'functions/filereader.func.php');
	require_once($pl_path.'functions/photopath.func.php');

	//#############################################################################################
	// DATEBASE QUERIES
	//#############################################################################################
	
	if ( isset($serial) ) {  //<--- make sure there's something to look up
			
		// connect to the database
		try {
			$dbh = new PDO("mysql:host=$SQL_HOST;dbname=$SQL_DB", $SQL_USER, $SQL_PASS, array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8', PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => false));
		} catch (PDOException $e) {}
		
		
		// CREATE QUERY TO PULL IMAGE INFO
		// --------------------------------------------------------------
		// selects
		$sql = 'SELECT img.image_serial, eve.event_name ';
		
		// search main table
		$sql.= 'FROM pl_images AS img ';
		
		 // join event table
		$sql.= 'LEFT JOIN pl_events AS eve ON img.image_event = eve.event_id ';
		
		// where clauses
		$sql.= 'WHERE img.image_serial=? ';
		$sql.= 'AND img.image_active=1 ';
		
		// limit (just in case!)
		$sql.= 'LIMIT 1 ';
		
		
		// RUN QUERY
		// --------------------------------------------------------------
		$stmt = $dbh->prepare($sql);
		$stmt->bindParam(1, $serial, PDO::PARAM_STR);
		$stmt->execute();
		$row = $stmt->fetch(PDO::FETCH_ASSOC);
		
		// close database connection;
		$dbh = NULL;
	
	}
	
	
	//#############################################################################################
	// TEST AND SET OPTIONAL PARAMETERS
	//#############################################################################################
	
	// test for width setting - default is 250
	$myWidth = (isset($width)) ? (int)$width : 250;
	// minimum width is 75
	$myWidth = ($myWidth < 75) ? 75 : $myWidth;
	// maximum width is 736
	$myWidth = ($myWidth > 736) ? 736 : $myWidth;
	
	// select image type based on image size
	if ($myWidth == 75) {
		$type = 'thumb';
	} elseif ($myWidth <= 300) {
		$type = 'web';
	} else {
		$type = 'small';
	} 
	
	// test for float setting - default is left
	if (isset($float)) {
		$myFloat = ($float=='left' || $float=='') ? 'float_left' : ($float=='right') ? 'float_right' : '';
	} else {
		$myFloat = 'float_left';
	}
	
	// generate width string
	$widthString = 'width: '.$myWidth.'px;';
	
	//#############################################################################################
	// GENERATE DETAIL PAGE
	//#############################################################################################
	
	if ($row['image_serial'] != NULL) { //<--- for non-empty result
		
		// generate image URL
		$dispUrl = photoPath($row['image_serial'], $type, $pl_url);
		
		// generate link to detail popup
		$vars = 'serial='.$serial;
		$detailUrl = $modx->makeUrl($DETAIL_PAGE, '', $vars);
		
		// read in the image link template
		$image_tpl = get_file_contents($pl_path.'templates/image.tpl.html');
	
		// inject content
		$placeholders = array('[[+pli_img]]', '[[+pli_link]]', '[[+pli_title]]', '[[+pli_class]]', '[[+pli_style]]', '[[+pli_caption]]');
		$values = array($dispUrl, $detailUrl, $row['event_name'], $myFloat, $widthString, $caption);
		
		$output = str_replace($placeholders, $values, $image_tpl);
		
		
	} else { //<-- for empty result
		
		$output = '';
				
	}
	
	if ($debug) {
		$output .= '<div style="background: #a00; color: #fff; padding: 20px;">';
		$output .= "Serial: <strong>$serial</strong><br/>";
		$output .= "SQL: <strong>$sql</strong><br/>";
		$output .= "Result: <strong>".serialize($row)."</strong><br />";
		$output .= "Float In: <strong>$float</strong><br/>";
		$output .= "Width In: <strong>$width</strong><br/>";
		$output .= "Caption In: <strong>$caption</strong><br/>";
		$output .= "Type: <strong>$type</strong><br/>";
		$output .= "URL: <strong>$dispUrl</strong><br/>";
		$output .= "Detail: <strong>$detailUrl</strong><br/>";
		$output .= "Float Out: <strong>$myFloat</strong><br/>";
		$output .= "Width Out: <strong>$myWidth</strong><br/>";
		$output .= "Width String: <strong>$widthString</strong>";
		$output .= '</div>';
	}
	
?>

<p>
[[!pl_image? &serial=`D9081-6` &caption=`Main Image`]]
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit.
</p>

<p>
[[!pl_image? &serial=`9347-30` &width=`150` &caption=`Secondary image` &float=`right`]]
Ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt.
</p>

<?php
$modx->getService('stuff', 'MyStuff', '/path/to/file/test.class.php');
return $modx->stuff->functionTest('Hello World!');
?>

<?php
class MyStuff {
	public function test ($string) {
		return '<hr/><strong>'.$string.'</strong><hr/>';
	}
}
?>