Strings are one of the basic variable types in PHP. They are typically used to build the output of a PHP script that is returned as a response to a HTTP request.
A string is a series of characters where each character is defined as a single byte with ordinal values form 0 to 255. The single byte limitation makes it impossible to have native Unicode support for strings. The mb_string extension makes it possible to work with Unicode (Multi Byte strings) in PHP, but these are not handled with the native variable type and native string manipulation functions.
Strings in PHP can be up to 2Gb long on ...
