Description:
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When I use locales and convert a string to float,
I get a truncated value, eg:

// comma as a decimal separator
setlocale(LC_ALL,'pl_PL');

$b = "1,2";
$c = $b*2;

echo $c; // php 4.2 >>> 2,4
            // php >= 4.3 >>> 2 (without any warning)

In php 4.2 (5.x) you used a strtod function. Now you use our zend_strtod
function which ignores locales. This truncating 
should be reported as a warning.
My suggest is:

Zend/zend_strtod.c, line: 1290:

if (c == ',') zend_error(E_WARNING, "Convert string to double: wrong decimal point, only . (truncate number %s)", s00);

Thanks in advance for adding this feature in the new version.

Expected result:
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Loging warning or notice if lose precision.