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Bug #52420 json_decode fails when underscores used in names
Submitted: 2010-07-23 22:13 UTC Modified: 2010-07-23 23:47 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: php at calendee dot com Assigned:
Status: Not a bug Package: JSON related
PHP Version: 5.3.3 OS: Mac OS 10.6.3, RHEL 5
Private report: No CVE-ID: None
View Developer Edit
 [2010-07-23 22:13 UTC] php at calendee dot com 
Description:
------------
There appears to be a bug in json_decode().  In some cases, if there is an 
underscore in one of the names in a JSON string, json_decode fails to retrieve the 
value.  If the underscore is replaced with nothing, json_decode properly retrieves 
the value.  However, some names with underscores work properly.  






In Depth Explanation : http://calendee.com/json_decode.php

Test script:
---------------
URL : http://calendee.com/json_decode.txt

<?php

$string = '{"alarm_groups_id":"0","start":"2010-07-23 10:23:13","stop":"2010-07-23 12:23:13","model":"","pairs_id":"","alarms_alarm_num":"1044","stps_abbr":"dlls","alarms_lsn":"bm700145","slc":"","card":"","port":"","linksets_company":"","opc":"","dpc":"","aftpc":"","feclli":"","cdpa_addr":"","cdpa_ssn":"","cdpa_tt":"","cgpa_addr":"","cgpa_ssn":"","cgpa_tt":"","translated_pc":"","translated_ssn":"","class":"","cong_card":"","cong_port":"","cpc":"","xmt_lsn":"","rcv_lsn":"","sccp_mt":"","sio":"","alarms_alarm_num":"","stps_abbr":"","alarms_lsn":"","slc":"","card":"","port":"","linksets_company":"","opc":"","dpc":"","aftpc":"","feclli":"","cdpa_addr":"","cdpa_ssn":"","cdpa_tt":"","cgpa_addr":"","cgpa_ssn":"","cgpa_tt":"","translated_pc":"","translated_ssn":"","class":"","cong_card":"","cong_port":"","cpc":"","xmt_lsn":"","rcv_lsn":"","sccp_mt":"","sio":""}';

echo "\nDecode with Underscore in Name\n";
print_r( json_decode($string) );

echo json_last_error() ;

$string = '{"alarm_groups_id":"0","start":"2010-07-23 10:23:13","stop":"2010-07-23 12:23:13","model":"","pairs_id":"","alarmsalarmnum":"1044","stps_abbr":"dlls","alarmslsn":"bm700145","slc":"","card":"","port":"","linksets_company":"","opc":"","dpc":"","aftpc":"","feclli":"","cdpa_addr":"","cdpa_ssn":"","cdpa_tt":"","cgpa_addr":"","cgpa_ssn":"","cgpa_tt":"","translated_pc":"","translated_ssn":"","class":"","cong_card":"","cong_port":"","cpc":"","xmt_lsn":"","rcv_lsn":"","sccp_mt":"","sio":"","alarms_alarm_num":"","stps_abbr":"","alarms_lsn":"","slc":"","card":"","port":"","linksets_company":"","opc":"","dpc":"","aftpc":"","feclli":"","cdpa_addr":"","cdpa_ssn":"","cdpa_tt":"","cgpa_addr":"","cgpa_ssn":"","cgpa_tt":"","translated_pc":"","translated_ssn":"","class":"","cong_card":"","cong_port":"","cpc":"","xmt_lsn":"","rcv_lsn":"","sccp_mt":"","sio":""}';

echo "\nDecode without Underscore in Name\n";
print_r( json_decode($string) );

echo json_last_error() ;


?>

Expected result:
----------------
Decode with Underscore in Name
stdClass Object
(
    [alarm_groups_id] => 0
    [start] => 2010-07-23 10:23:13
    [stop] => 2010-07-23 12:23:13
    [model] => 
    [pairs_id] => 
    [alarms_alarm_num] => 1044
    [stps_abbr] => 
    [alarms_lsn] => bm700145
    [slc] => 
    [card] => 
    [port] => 
    [linksets_company] => 
    [opc] => 
    [dpc] => 
    [aftpc] => 
    [feclli] => 
    [cdpa_addr] => 
    [cdpa_ssn] => 
    [cdpa_tt] => 
    [cgpa_addr] => 
    [cgpa_ssn] => 
    [cgpa_tt] => 
    [translated_pc] => 
    [translated_ssn] => 
    [class] => 
    [cong_card] => 
    [cong_port] => 
    [cpc] => 
    [xmt_lsn] => 
    [rcv_lsn] => 
    [sccp_mt] => 
    [sio] => 
)
Decode without Underscore in Name
stdClass Object
(
    [alarm_groups_id] => 0
    [start] => 2010-07-23 10:23:13
    [stop] => 2010-07-23 12:23:13
    [model] => 
    [pairs_id] => 
    [alarmsalarmnum] => 1044
    [stps_abbr] => 
    [alarmslsn] => bm700145
    [slc] => 
    [card] => 
    [port] => 
    [linksets_company] => 
    [opc] => 
    [dpc] => 
    [aftpc] => 
    [feclli] => 
    [cdpa_addr] => 
    [cdpa_ssn] => 
    [cdpa_tt] => 
    [cgpa_addr] => 
    [cgpa_ssn] => 
    [cgpa_tt] => 
    [translated_pc] => 
    [translated_ssn] => 
    [class] => 
    [cong_card] => 
    [cong_port] => 
    [cpc] => 
    [xmt_lsn] => 
    [rcv_lsn] => 
    [sccp_mt] => 
    [sio] => 
    [alarms_alarm_num] => 
    [alarms_lsn] => 
)

Actual result:
--------------
Decode with Underscore in Name
stdClass Object
(
    [alarm_groups_id] => 0
    [start] => 2010-07-23 10:23:13
    [stop] => 2010-07-23 12:23:13
    [model] => 
    [pairs_id] => 
    [alarms_alarm_num] => 
    [stps_abbr] => 
    [alarms_lsn] => 
    [slc] => 
    [card] => 
    [port] => 
    [linksets_company] => 
    [opc] => 
    [dpc] => 
    [aftpc] => 
    [feclli] => 
    [cdpa_addr] => 
    [cdpa_ssn] => 
    [cdpa_tt] => 
    [cgpa_addr] => 
    [cgpa_ssn] => 
    [cgpa_tt] => 
    [translated_pc] => 
    [translated_ssn] => 
    [class] => 
    [cong_card] => 
    [cong_port] => 
    [cpc] => 
    [xmt_lsn] => 
    [rcv_lsn] => 
    [sccp_mt] => 
    [sio] => 
)
0
Decode without Underscore in Name
stdClass Object
(
    [alarm_groups_id] => 0
    [start] => 2010-07-23 10:23:13
    [stop] => 2010-07-23 12:23:13
    [model] => 
    [pairs_id] => 
    [alarmsalarmnum] => 1044
    [stps_abbr] => 
    [alarmslsn] => bm700145
    [slc] => 
    [card] => 
    [port] => 
    [linksets_company] => 
    [opc] => 
    [dpc] => 
    [aftpc] => 
    [feclli] => 
    [cdpa_addr] => 
    [cdpa_ssn] => 
    [cdpa_tt] => 
    [cgpa_addr] => 
    [cgpa_ssn] => 
    [cgpa_tt] => 
    [translated_pc] => 
    [translated_ssn] => 
    [class] => 
    [cong_card] => 
    [cong_port] => 
    [cpc] => 
    [xmt_lsn] => 
    [rcv_lsn] => 
    [sccp_mt] => 
    [sio] => 
    [alarms_alarm_num] => 
    [alarms_lsn] => 
)

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 [2010-07-23 23:36 UTC] php at calendee dot com
-Status: Open +Status: Closed
 [2010-07-23 23:36 UTC] php at calendee dot com 
I've actually solved this "bug".  It's not a bug at all.  The problem was that my json string repeated the same names several times.  However, the values were not provided twice.  So, when I renamed the "alarms_alarm_num" and "alarms_lsn" names to "alarmsalarmnum" and "alarmslsn", I was actually correcting the fact that those names were listed twice.

Sorry for the bother.
 [2010-07-23 23:47 UTC] pajoye@php.net
-Status: Closed +Status: Bogus
 
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