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PHP str_rot13() Function

Last Updated : 21 Jun, 2023
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The function str_rot13() is a built-in function in php. This function accepts a string and shifts every alphabet present in the string by 13 places in the alphabet. The function leaves numeric and non-alphabetical characters untouched. By passing an encoded string as argument, the function will return the original string. Syntax:
str_rot13 ( $string )
Parameter: This function accepts only a string parameter which can be observed from the above syntax. The description of the parameter is as follows.
  • $string : This is the only mandatory parameter of the function. This parameter passes a string to the function which needs to be encoded.
Return Value: The function returns the encoded string. Examples:
Input : $string = "Geeks for Geeks"
Output : Trrxf sbe Trrxf

Input : $string = "Trrxf sbe Trrxf"
Output : Geeks for Geeks
Below program illustrate the str_rot13() function in PHP: php
<?php

echo str_rot13("Geeks for Geeks");
echo "\n";
echo str_rot13("Trrxf sbe Trrxf");

?>
Output:
Trrxf sbe Trrxf
Geeks for Geeks
Reference: http://php.net/manual/en/function.str-rot13.php

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