Here is a littel snippet that together with an image-TV and an text-TV will change the class of an image according to it’s with. It will output the image and the caption in a definition list and it will also height and width to the img-element.
<?php
$base = $_SERVER['DOCUMENT_ROOT'];
$class='';
$caption='';
$tvout=$modx->getTemplateVarOutput('caption_image',$modx->documentIdentifier);
if($tvout['caption_image']!='') $caption.=$tvout['caption_image'];
$tvout=$modx->getTemplateVarOutput('image',$modx->documentIdentifier);
if($tvout['image']!='') $src.=$tvout['image'];
$url=parse_url($src);
$path=$url['path'];
$file=$base.'/'.$path;
$alt = basename($file);
$alt = ereg_replace('_','',$alt);
$alt = ereg_replace('^(.*)\.[a-zA-Z]*$','\\1',$alt);
$alt = ucfirst($alt);
if(file_exists($file) && !is_dir($file)) {
list($w, $h) = getimagesize($file);
if($w=='250'){
$output = <<<EOD
<dl class="left"><dt><img src="/{$src}" alt="{$alt}" title="{$caption}" width="{$w}" height="{$h}" /></dt><dd>{$caption}</dd></dl>
EOD;
}
if($w=='390'){
$output = <<<EOD
<dl class="top"><dt><img src="/{$src}" alt="{$alt}" title="{$caption}" width="{$w}" height="{$h}" /></dt><dd>{$caption}</dd></dl>
EOD;
}
}
return $output;
?>
How to use: First create a new snippet called if_image and copy the code to it. At the end of the snippet set the width of the images - in this example 250px and 390px - and define the class names according to your needs. Save.
Create an image-TV with the name of image and a text-TV that you should call caption_image.
Call the snippet with [[if_image]].
That’s all.
