PHP String Functions: Wrapper class to treat strings as object

This package is a wrapper class to treat strings as object.

It can take a given string value with optional start offset and length to take it as the string initial value.

It provides functions to perform several types of operations on the string like:

- Get the character and its code at a given string position
- Compare with a given string optionally ignoring the case
- Concatenate the string with one or more other strings
- Check if the string contains or ends with another given string
- Format the string using sprintf
- Creates a new string with a character with a given code
- Get the position of the first or the last occurrence of a given text inside the string optionally ignoring the case
- Create a new string object joining elements of an array separated with a given delimiter character
- Match the string with regular expressions
- Pad the string with given character at the beginning or end of the string
- Etc..