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   ";echo "fei lian xu shu zu";//非连续数组，{}表示$no_sequential = array(1=>'foo',2=>'bar',3=>'baz',4=>'blong');//数组解码echo json_encode($no_sequential);echo "
";//删除1个元素unset($sequential[1]);//数组解码echo json_encode($sequential);echo "
";//二维数组echo "er wei shu zu";//[]表示数组，{}表示对象$arr = array(array('name'=>'xiao long'),array('name'=>'zhang san'));echo json_encode($arr);显示结果：lian xu shu zu["foo","bar","baz","blong"]fei lian xu shu zu{"1":"foo","2":"bar","3":"baz","4":"blong"}{"0":"foo","2":"baz","3":"blong"}er wei shu zu[{"name":"xiao long"},{"name":"zhang san"}]