Select com variáveis

SELECT
      calldate,src,dst,dstchannel,(billsec/60),disposition,uniqueid
FROM cdr
WHERE billsec >=4
AND convert(calldate, date) BETWEEN '$ano_i-$mes_i-$diba_i' and '$ano_f-$mes_f-$dia_f'
AND src = $src
AND dstchannel REGEXP '(^.*[SIP]\/[a-zA-Z]{3})'
AND  dst REGEXP '^.{3}[5-9]{1}.*' OR '^.{1}9[0-9]{8}'
ORDER BY calldate;