What potential issue arises when using literal numbers that start with 0 in PHP comparisons?

When using literal numbers that start with 0 in PHP comparisons, the potential issue is that PHP will interpret these numbers as octal (base 8) values instead of decimal (base 10) values. This can lead to unexpected results in comparisons or calculations. To solve this issue, you can simply ensure that numbers starting with 0 are represented as strings in your PHP code. 

$num1 = '0123'; // Representing the number as a string
$num2 = 123; 

if ((int)$num1 === $num2) {
    echo "Numbers are equal";
} else {
    echo "Numbers are not equal";
}

Keywords

literal numbers comparisons PHP leading zero type juggling

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