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Bug #70669 Strings starting with a '+' == 0
Submitted: 2015-10-08 13:05 UTC Modified: 2015-10-09 19:27 UTC
Votes:1
Avg. Score:1.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: wayne at huntedcow dot com Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.6.14 OS: any
Private report: No CVE-ID: None
View Developer Edit
 [2015-10-08 13:05 UTC] wayne at huntedcow dot com 
Description:
------------
Any string starting with a '+' character is resolved as 0 for the purposes of an == check. This resulted in my if ($value == '+TIMESTAMP') coming out true, when $value = 0.

Test script:
---------------
echo (0 == '+' ? 'TRUE' : 'FALSE');

Expected result:
----------------
FALSE

Actual result:
--------------
TRUE

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 [2015-10-09 19:27 UTC] nikic@php.net
-Status: Open +Status: Not a bug
 [2015-10-09 19:27 UTC] nikic@php.net 
This has nothing to do with '+'. In general 0 == "not-numeric-string" always holds.

Essentially comparison of integer to string works by casting the string to an integer first.
 
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