php将table转换成数组的函数，单词之间的空格也被删掉了！

下面是我用的函数，可以正常转换，就是转换之后 英语句子里面单词之间没有空格了，谁帮我看下。

 function get_td_array($table) {            $td_array = "";            $table = preg_replace("']*?>'si", "", $table);            $table = preg_replace("']*?>'si", "", $table);            $table = preg_replace("']*?>'si", "", $table);            $table = str_replace("", "{tr}", $table);            $table = str_replace("", "{td}", $table);            $table = preg_replace("'<[\/\!]*?[^<>]*?>'si", "", $table);            $table = preg_replace("'([\r\n])[\s]+'", "", $table);            $table = str_replace(" ", "", $table);            $table = str_replace(" ", "", $table);            $table = explode('{tr}', $table);            array_pop($table);            foreach ($table as $key => $tr) {                $td = explode('{td}', $tr);                array_pop($td);                $td_array[] = $td;            }             return $td_array;        }