Single-character substitutions : substr « String « PHP

Single-character substitutions

  $qwerty = 'qwertyuiopasdfghjklzxcvbnm' . 'QWERTYUIOPASDFGHJKLZXCVBNM';
  $dvorak = 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  $message = "Start the attack when the sun rises.";
  $encoded = strtr($message, $qwerty, $dvorak);
  $decoded = strtr($encoded, $dvorak, $qwerty);

Related examples in the same category

1.A negative substr() length parameter
2.A positive substr() length parameter
3.Accessing Substrings: string substr ( string string, int start [, int length] )
4.Extracting Part of a String with substr()
5.Extracting a substring with substr()
6.Extracting the end of a string with substr()
7.If you pass substr() a negative number, it counts from the end of the string.
8.Setting up and working with both strings and substrings
9.Truncating a string with substr()
10.Using substr() with length past the end of the string
11.Using substr() with negative length
12.Using substr() with negative start
13.Using substr() with positive $start and $length
14.Using substr() with positive start and no length
15.string substr ( string str, int start_pos [, int length] ) reads part of a string and takes a minimum of two parameters
16.substr() function returns the part of the string between the start and start+length parameters.
20.Specify a negative number as parameter three for the length
21.Using negative lengths allows you to say "copy everything but the last three characters,"
22.Reading Fixed-Width Delimited Data