What is the octdec() method in PHP?

The octdec() method can be used to convert an octal string to a decimal number.

Syntax

octdec(string $octal_string): int|float

Parameters

  • Any invalid characters in the octal_string argument are skipped.

From PHP 7.4.0, any invalid characters in octal_string are deprecated.

  • The octal_string argument should be a type of string, otherwise unexpected results will be produced.

Return value

octdec returns the decimal number of type int or float, based on the size of the value.

Code

<?php 
  $num = "70";
  echo "decimal value of ". $num. " is: ". octdec($num)."\n";
  $num = "77";
  echo "decimal value of ". $num. " is: ". octdec($num)."\n";
  $num = "100";
  echo "decimal value of ". $num. " is: ". octdec($num)."\n";
  $num = "107";
  echo "decimal value of ". $num. " is: ". octdec($num)."\n";
?>

Explanation

In the code above, we use the octdec method to convert the octal strings of 70, 77, 100 and 107 into decimal representation.

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