octdec(): decimal equivalent of octal number

number octdec(string $octal_number);

Example : Octal to Decimal

<?Php
echo octdec(5); // Output 5 
echo "
";
echo octdec(45); // Output 37 
echo "
";
echo octdec(400); // Output is 256
echo "
";
echo octdec(657); // Output is 431
echo "
";
echo octdec(3000); // Output is 1536
?>