Question

  $a = '{ 'tag': '<b></b>' }';   echo json_encode( json_decode($a) ); 

This outputs:

{'tag':'<b><\/b>'} 

when you would think it would output exactly the input. For some reason json_encode adds an extra slash.

Answer 1

Because it’s part of the JSON standard

http://json.org/

char

any-Unicode-character-     except-"-or-\-or-     control-character \" \\ \/ <---- see here? \b \f \n \r \t \u four-hex-digits