$input = strip_tags($input); // strip HTML
$input = strtolower($input); // convert to lowercase
$input = preg_replace('/[^\.A-Za-z0-9 _-]/', '', $input); // strip non-alphanumeric characters
$input = preg_replace('/\s+/', '-', $input); // convert white-space to dash
$input = preg_replace('/-+/', '-', $input);  // convert multiple dashes to one
$input = trim($input, '-'); // trim excess

return $input;
Source

/* stripWords snippet */
$words = array_map('trim', explode(',', $options));
return str_replace($words, '', $input);
Source

/**
 * parseTags output filter
 * by Mark Hamstra (http://www.markhamstra.nl)
 * free to use / modify / distribute to your will
 */

$tpl = $modx->getOption('tpl', $scriptProperties, 'tagItemBasic');
$iconClass = $modx->getOption('iconClass', $scriptProperties, 'info');

if ($input == '') { return ''; } // Output filters are also processed when the input is empty, so check for that.
$tags = explode(',',$input); // Based on a delimiter of comma-space.

// Process them individually
foreach ($tags as $key => $value) {
    $value = ucfirst($value);
    $output[] = $modx->getChunk($tpl,array(
        'tag' => $value,
        'icon_class' => $iconClass,
    ));
}

return implode($output);
Source

/**
 * textToNumber
 *
 * Turn a written number into an actual one.
 *
 * Written numbers are used for setting column counts in SemanticUI, but as
 * numeric values they can be reused in other places too.
 * For example: to set the number of visible slides in the Slick js settings.
 */

$numbers = array(
    '1' => 'one',
    '2' => 'two',
    '3' => 'three',
    '4' => 'four',
    '5' => 'five',
    '6' => 'six',
    '7' => 'seven',
    '8' => 'eight',
    '9' => 'nine',
    '10' => 'ten',
    '11' => 'eleven',
    '12' => 'twelve',
    '13' => 'thirteen',
    '14' => 'fourteen',
    '15' => 'fifteen',
    '16' => 'sixteen'
);

$output = array_search($input, $numbers);

return $output;
Source

$lines = $modx->getOption('input', $scriptProperties, $input);
$search = $modx->getOption('searchString', $scriptProperties, $options);

// Create an array of all lines inside the input
$lines = nl2br($lines);
$lines = explode('<br />', $lines);

// Check if the line contains the string we're looking for, and print if it does
foreach ($lines as $line) {
    if(strpos($line, $search) !== false) {
        $output .= $line;
    }
}

// @todo: This will get messy when multiple lines are found
return $output;
Source