Regex strip out all non alpha Characters from a String

I have created a code where there are many non alpha characters in string and now i want to replace all those non-alpha characters with a # sign.

For example if in my code there is a string There are many numbers like 1234-78.*.25.*.65 , Over here i want to replace * with # sign.Can anyone tell me what should be the code which i need to write.

Try to use the following code for replacing non alpha Characters from a String

Code:

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Function Demo(ByVal input As String) As String

  Dim ab As String = "[1234-78.*.25.*.65]"

  Dim xy As String = "#"

  Demo = Regex.Replace(input, ab,xy)
 

End Function

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If you want replace non alpha Characters from a string by using PHP then use the following code.

PHP Code:

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<?php

$string = preg_replace('/[^a-z0-9*]/i', '', $string);

$string = str_replace('*', '%', $string);
?>

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