/**
* @param string $string
* @return string
*/
public function prepareDataIndex($string)
{
$string = strip_tags($string);
$expressions = $this->config->getLongTailExpressions();
foreach ($expressions as $expr) {
$matches = null;
preg_match_all($expr['match_expr'], $string, $matches);
foreach ($matches[0] as $math) {
$math = preg_replace($expr['replace_expr'], $expr['replace_char'], $math);
$string .= ' ' . $math;
}
}
return ' ' . $string . ' ';
}
/**
* Apply long tail expression for word
*
* @param string $word
*
* @return string
*/
public function longTail($word)
{
$expressions = $this->config->getLongTailExpressions();
foreach ($expressions as $expr) {
$matches = null;
preg_match_all($expr['match_expr'], $word, $matches);
foreach ($matches[0] as $math) {
$math = preg_replace($expr['replace_expr'], $expr['replace_char'], $math);
if ($math) {
$word = $math;
}
}
}
return $word;
}
