','',$mathCode); $mathCode = str_replace(' ','',$mathCode); $mathCode = html_entity_decode($mathCode); $replaceBefore = substr($Text,0,$foundMathFrom); $replaceAfter = substr($Text,$foundMathTo+13); $Text = $replaceBefore.$mathCode.$replaceAfter; $foundMath = strpos($Text, '</math>'); } return $Text; } ?> Mathe lernen