What are the potential drawbacks of using leading zeros in PHP variables or calculations?

Using leading zeros in PHP variables or calculations can cause unexpected behavior, as PHP interprets numbers with leading zeros as octal values. This can lead to errors in calculations or comparisons if the intended value is not in octal format. To avoid this issue, it is recommended to avoid using leading zeros in PHP variables or calculations.

// Avoid using leading zeros in PHP variables or calculations
$number = 0123; // Incorrect usage of leading zero
$number = 123; // Correct usage without leading zero