array(2) {
  ["xx-aa"]=>
  array(3) {
    ["price"]=>
    string(5) "25.00"
    ["number"]=>
    string(2) "10"
    ["title"]=>
    string(12) "普通毛巾"
  }
  ["yy-bb"]=>
  array(3) {
    ["price"]=>
    string(5) "36.00"
    ["number"]=>
    string(1) "8"
    ["title"]=>
    string(12) "精品毛巾"
  }
}
string(197) "a:2:{s:5:"xx-aa";a:3:{s:5:"price";s:5:"25.00";s:6:"number";s:2:"10";s:5:"title";s:12:"普通毛巾";}s:5:"yy-bb";a:3:{s:5:"price";s:5:"36.00";s:6:"number";s:1:"8";s:5:"title";s:12:"精品毛巾";}}"
string(0) ""
bool(false)
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