Batch Find and Replace a value in a MODX TV

findReplaceTV.php

<?php
/*

 Name:
 
 findReplaceTV
 
 Description :
 
 This snippet is useful if you want to batch replace a string in multiple resources at once. 
 
 Usage : 
 
 [[!findReplaceTV ? 
 	&parent=`91` 			// a container ID
 	&tvname=`image` 		// a tv name 
 	&find=`assets/users` 		// look for this string
 	&replace=`assets/people` 	// replace with this one
 ]]
 
 Version 1 :   2014.01.07@empiguet 
 
*/

foreach ($modx->getIterator('modResource', array('parent' => $parent)) as $res) { 

	$docid = $res->get('id'); // ID loop 

	$page = $modx->getObject('modResource', $docid);
	
	$tvvalue = $page->getTVValue($tvname);

	$tvvalue = str_replace($find, $replace, $tvvalue);

	$page->setTVValue($tvname, $tvvalue) ;

	$res->save(); 

	echo ('ID :' . $docid . ' => TV (updated) : ' . $page->getTVValue($tvname) .' <br/>' );
}