PHP Strings Reversing a String by Word or Byte

PHP Strings

Reversing a String by Word or Byte

Problem

You want to reverse the words or the bytes in a string.

Solution

Example  Reversing a string by byte

              print strrev('This is not a palindrome.');

Example  prints

             .emordnila a ton si sihT

To reverse by words, explode the string by word boundary, reverse the words, and then

rejoin

Example  Reversing a string by word

              $s = "Once upon a time there was a turtle.";

               // break the string up into words

               $words = explode(' ',$s);

               // reverse the array of words

               $words = array_reverse($words);

               // rebuild the string

               $s = implode(' ',$words);

               print $s;

Example  prints:

               turtle. a was there time a upon Once

Discussion

Reversing a string by words can also be done all in one line with the code

Example  Concisely reversing a string by word

              $reversed_s = implode(' ',array_reverse(explode(' ',$s)));