What potential issue can arise when using integer values with leading zeros in PHP?

When using integer values with leading zeros in PHP, the leading zeros indicate an octal number. This can lead to unexpected behavior or errors, especially when performing mathematical operations. To avoid this issue, you can explicitly convert the integer to a string before using it in your code.

$number = "0123"; // Leading zeros are preserved as a string
$numberAsInt = (int)$number; // Convert the string to an integer if needed