主要是判断淘宝的满减
$str = "满4元减1元";
$po1= (strpos($str,"满"));
$po2= (strpos($str,"元减"));
echo '取值:'.substr($str,$po1+3,$po2-3);
取值:4
主要是判断淘宝的满减
$str = "满4元减1元";
$po1= (strpos($str,"满"));
$po2= (strpos($str,"元减"));
echo '取值:'.substr($str,$po1+3,$po2-3);
取值:4