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Bug #52397 json_encode display_errors dependency
Submitted: 2010-07-22 01:00 UTC Modified: 2010-08-17 14:29 UTC
From: david at grudl dot com Assigned:
Status: Not a bug Package: JSON related
PHP Version: 5.3.3RC3 OS:
Private report: No CVE-ID: None
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 [2010-07-22 01:00 UTC] david at grudl dot com
Invalid UTF-8 string throws E_WARNING depending on the configuration directive display_errors:

ini_set('display_errors', 0);
json_encode("\xFF");  // PHP Warning:  json_encode(): Invalid UTF-8 sequence in argument (in error log)

ini_set('display_errors', 1);
json_encode("\xFF");  // *nothing*

This directive determines whether errors should be printed to the screen as part of the output or if they should be hidden from the user. It should not be used to change json_encode behaviour.

The same bug affects htmlentities() and htmlspecialchars() 

Test script:
ini_set('display_errors', 0);


htmlspecialchars("\xFF", ENT_COMPAT, 'utf-8');

htmlentities("\xFF", ENT_COMPAT, 'utf-8');


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 [2010-08-17 14:29 UTC]
-Status: Open +Status: Bogus
 [2010-08-17 14:29 UTC]
The return values are the same and so is the operation...
 [2011-01-12 01:18 UTC] fake at example dot com
This is a valid bug. The point of this bug is that no warning ever is issued if display_errors is off. The warnings should still be issued, they just shouldn't be.... displayed.

ini_set('display_errors', 1);
print_r(error_get_last()); //nothing! wtf?

ini_set('display_errors', 0);
print_r(error_get_last()); //now its there!
 [2012-09-03 22:18 UTC] juzna dot cz at gmail dot com
This bug has been upgraded in latest snapshot of 5.4 - json_encode doesn't report 
errors at all :/
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