PHP | base_convert( ) Math Function

The base_convert() function in PHP is used to convert a number given in an arbitary base to a desired base.
Both the base should be between 2 and 32 and bases with digits greater than 10 are represented with letters a-z i.e 10 is represented as a, 11 is represented as b and 35 is represented as z.
The case of the letters is not sensitive.

Syntax:

string base_convert($inpNumber, $fromBase, $desBase)

Parameters Used: This function accepts three parameters and are described below:



  1. $inpNumber : It is the number to be converted.
  2. $fromBase : It is the original base of the number.
  3. $desBase : It is the base to which you want to convert.

Return Value: It returns a string which reperesents the number converted to the desired base.

Examples:

Input : base_convert(B296, 16, 8)
Output : 131226

Input : base_convert(B296, 16, 2)
Output : 1011001010010110

Input : base_convert(621, 8, 16)
Output : 191

Input : base_convert(110011, 2, 16)
Output : 33

Below programs illustrate the base_convert() function in PHP:

  • Converting hexadecimal to octal:
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    <?php
      
    $hexadec = "B296"
    echo base_convert($hexadec, 16, 8);
      
    ?>      

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    Output:

    131226
  • Converting hexadecimal to binary:
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    <?php
      
    $hexadec = "B296"
    echo base_convert($hexadec, 16, 2);
      
    ?>      

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    Output:

    1011001010010110
  • Converting octal to hexadecimal:
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    <?php
      
    $octal = "621"
    echo base_convert($octal, 8, 16);
      
    ?>   

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    Output:

    191
  • Converting binary to hexadecimal:
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    <?php
      
    $binary = "110011"
    echo base_convert($binary, 2, 16);
      
    ?>
           

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    Output:

    33

Reference:
http://php.net/manual/en/function.base-convert.php



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