Creating a secret code converter Post: 302722575

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Top Forums Shell Programming and Scripting Creating a secret code converter Post 302722575 by Yoda on Saturday 27th of October 2012 03:53:28 PM

10-27-2012

Moderator

Suggestion:

1. You can create a file: key.txt which has data about which char to replace.

E.g. I created a file: key.txt with following data:-

Code:

cat key.txt
a=z
b=y
c=x
d=w
e=v
f=u
g=t
h=s
i=r
j=q
k=p
l=o
m=n
n=m
o=l
p=k
q=j
r=i
s=h
t=g
u=f
v=e
w=d
x=c
y=b
z=a

2. Then you can use this file to replace your input string by reading character by character:-

Code:

#!/bin/bash
clear
echo -ne "Enter word you want to encode: "
read userinput
echo "$userinput" > userinputtmp

while read -n1 char # Reading input char by char
do
        rep_char=`awk -v CHR=$char -F"=" ' { if($1==CHR) print $2; } ' key.txt` # Getting the character to be replaced.
        echo -e "$rep_char\c" >> tmp # Replacing and writing it to a tmp file.
done < userinputtmp

mv tmp useroutputtmp

cat useroutputtmp

I hope it helps.

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LEARN ABOUT PHP

fgetc

FGETC(3)								 1								  FGETC(3)

fgetc - Gets character from file pointer

SYNOPSIS

       string fgetc (resource  $handle)

DESCRIPTION

	Gets a character from the given file pointer.

PARAMETERS

	      o $handle
		-The  file  pointer must be valid, and must point to a file successfully opened by fopen(3) or fsockopen(3) (and not yet closed by
		fclose(3)).

RETURN VALUES

	Returns a string containing a single character read from the file pointed to by $handle. Returns FALSE on EOF.

       Warning

	      This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
	      Booleans for more information. Use the === operator for testing the return value of this function.

EXAMPLES

       Example #1

	      A fgetc(3) example

	      <?php
	      $fp = fopen('somefile.txt', 'r');
	      if (!$fp) {
		  echo 'Could not open file somefile.txt';
	      }
	      while (false !== ($char = fgetc($fp))) {
		  echo "$char
";
	      }
	      ?>

NOTES

       Note

	      This function is binary-safe.

SEE ALSO

       fread(3), fopen(3), popen(3), fsockopen(3), fgets(3).

PHP Documentation Group 														  FGETC(3)