What potential issues can arise when using sprintf() in PHP, especially when dealing with negative values?

When using sprintf() in PHP with negative values, potential issues can arise due to the formatting placeholders not handling negative signs properly. To solve this issue, you can use the "%+d" format specifier in sprintf() to ensure that negative numbers are correctly displayed with their sign. 

$negativeNumber = -10;
$formattedNumber = sprintf("%+d", $negativeNumber);
echo $formattedNumber; // Output: -10

Keywords

sprintf PHP negative values formatting vulnerabilities

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