Description:
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---
From manual page: http://www.php.net/function.sprintf#Description
---

with some integer obtain after an operation from a float, sprintf('%d', $val) return a different value

Test script:
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$var1 = 4.77*100;
echo $var2 = sprintf("%d", $var1);

Expected result:
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should return 477

Actual result:
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return 476


works when cast in string
$var1 = 4.77*100;
echo $var2 = sprintf("%d", (string)$var1);