From:             juzna dot cz at gmail dot com
Operating system: Ubuntu 10.04
PHP version:      5.4.6
Package:          JSON related
Bug Type:         Bug
Bug description:errors json_encode do NOT call error handler

Description:
------------
When there is an error within json_encode (e.g. due to invalid utf8),
E_WARNING 
should be raised. However, that doesn't happen in some cases.

It doesn't happen when display_errors is set to On.
In latest snapshot of 5.4 it does not happen at all.

Test script:
---------------
<?php
/**
 * WTF? Error handler is not called, when display_errors=On
 *
 * _errorHandler must be called in each case, but it's not.
 *
 * Results differ on different PHP versions.
 */


function _errorHandler($severity, $message, $file, $line, $context) {
        $GLOBALS['err'] = func_get_args();
//      echo "Error ($severity) $message in $file:$line\n";
}
set_error_handler('_errorHandler');


// display_errors = Off, works fine
{
        ini_set('display_errors', 0);


        // Calls error handler, fine
        $err = NULL;
        $tmp = substr(new stdClass(), 1, 1);
        var_dump($err[0], $err[1]);


        // Calls error handler, fine
        $err = NULL;
        $tmp = json_encode(array("bad utf\xFF"));
        var_dump($err[0], $err[1]);
}



// display_errors = On, WTF???
{
        ini_set('display_errors', 1);


        // Calls error handler, fine
        $err = NULL;
        $tmp = substr(new stdClass(), 1, 1);
        var_dump($err[0], $err[1]);


        // Does NOT call error handler, WTF???
        $err = NULL;
        $tmp = json_encode(array("bad utf\xFF"));
        var_dump($err[0], $err[1]);
}


Expected result:
----------------
int(2)
string(55) "substr() expects parameter 1 to be string, object given"
int(2)
string(49) "json_encode(): Invalid UTF-8 sequence in argument"
int(2)
string(55) "substr() expects parameter 1 to be string, object given"
int(2)
string(49) "json_encode(): Invalid UTF-8 sequence in argument"


Actual result:
--------------
On 5.4.6:

int(2)
string(55) "substr() expects parameter 1 to be string, object given"
int(2)
string(49) "json_encode(): Invalid UTF-8 sequence in argument"
int(2)
string(55) "substr() expects parameter 1 to be string, object given"
NULL
NULL



On 5.4-latest:

int(2)
string(55) "substr() expects parameter 1 to be string, object given"
NULL
NULL
int(2)
string(55) "substr() expects parameter 1 to be string, object given"
NULL
NULL


-- 
Edit bug report at https://bugs.php.net/bug.php?id=63004&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=63004&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=63004&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=63004&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=63004&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=63004&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=63004&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=63004&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=63004&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=63004&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=63004&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=63004&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=63004&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=63004&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=63004&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=63004&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=63004&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=63004&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=63004&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=63004&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=63004&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=63004&r=mysqlcfg

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