How to filter data when xml is converted to json?

How to filter data when xml is converted to json? JSON XML

The xml below is converted to json
But under the P node, only The data of these two nodes is not required for other data.
If you use json_encode to transfer out all the data
How can I convert it to json, but as long How to get the data?

For example
{"PN": "\ u7b2c \ u4e00 \ u5468 \ u64ad \ u5267 \ u573a \ uff1a \ u8ffd \ u9c7c \ u4f20 \ u5947 31", "PT": "22:01:00 "}

------- Xml ---------

110171675
Zhang San
2013-08-19 00:02:00
46
24
74750
0
2013-08-19 00:02:00
AM

110171676
I am a beauty
2013-08-19 01:15:00
46
24
74501
0
2013-08-19 01:15:00
AM

110171677
Li Si
2013-08-19 02:09:00
46
24
64519
71411
2013-08-19 02:09:00
AM

Reply to discussion (solution)

$ String = <
       
      
    
       
        
110171675
           
       
        
Zhang San
           
       
        
2013-08-19 00:02:00
           
       
        
46
           24    
       
        
74750
           
       
        
0
           
       
        
2013-08-19 00:02:00
       AM    
         
  
      
    
       
        
110171676
           
       
        
I am a beauty
           
       
        
2013-08-19 01:15:00
           
       
        
46
           24    
       
        
74501
           
       
        
0
           
       
        
2013-08-19 01:15:00
       AM    
         
  
      
    
       
        
110171677
           
       
        
Li Si
           
       
        
2013-08-19 02:09:00
           
       
        
46
           24    
       
        
64519
           
       
        
71411
           
       
        
2013-08-19 02:09:00
       AM    
         
  XML; $ xml = simplexml_load_string ($ string); foreach ($ xml-> P as $ item) {$ item = (array) $ item; $ arr [] = array ('pn '=> $ item ['pn'], 'pt' => $ item ['pt']);} echo json_encode ($ arr );
     

[{"PN": "\ u5f20 \ u4e09", "PT": "00:02:00" },{ "PN ": "\ u6211 \ u662f \ u5927 \ u7f8e \ u4eba", "PT": "01:15:00" },{ "PN": "\ u674e \ u56db", "PT ": "2013-08-19 02:09:00"}]

$ Xml = <XML
       
      
    
       
        
110171675
           
       
        
Zhang San
           
       
        
2013-08-19 00:02:00
           
       
        
46
           24    
       
        
74750
           
       
        
0
           
       
        
2013-08-19 00:02:00
       AM    
         
  
      
    
       
        
110171676
           
       
        
I am a beauty
           
       
        
2013-08-19 01:15:00
           
       
        
46
           24    
       
        
74501
           
       
        
0
           
       
        
2013-08-19 01:15:00
       AM    
         
  
      
    
       
        
110171677
           
       
        
Li Si
           
       
        
2013-08-19 02:09:00
           
       
        
46
           24    
       
        
64519
           
       
        
71411
           
       
        
2013-08-19 02:09:00
       AM    
         
  
     XML; $ sm = simplexml_load_string ($ xml); foreach ($ sm-> P as $ item) {$ r [] = array ('pn '=> strval ($ item-> PN), 'pt' => strval ($ item-> PT ));} echo json_encode ($ r );

[{"PN": "\ u5f20 \ u4e09", "PT": "00:02:00" },{ "PN ": "\ u6211 \ u662f \ u5927 \ u7f8e \ u4eba", "PT": "01:15:00" },{ "PN": "\ u674e \ u56db", "PT ": "2013-08-19 02:09:00"}]