How to use str rot13 in PHP

In this article I will explain how the str_rot13() function can be used in PHP.
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str_rot13() function in PHP

  • The str_rot13() function is used to perform the ROT13 encoding on a string.
  • In str_rot13() function, Numeric and non-alphabetical characters remains untouched.
  • The ROT13 encoding shifts every letter 13 places in the alphabet.
  • Encoding and decoding are done by the same function




  • string string is required parameter. it is specify for encode to the string.

The following example show to how the str_rot13() function can be used in PHP.



<h3 style="color: darkblue;">str_rot13() function example in PHP</h3>


    echo "ROT13 encoding of c-sharpcorner is : ".str_rot13("C-sharpcorner...");

    echo "<br />";

    echo "ROT13 encoding of Welcome is : ".str_rot13("Welcome");






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