How strings are declared in PHP explain string operators?

Related questions

1. What is difference between single quote and double quote in php?
2. What is var dump?
3. What is here document in Unix?
4. What is end EOF SAS?
5. What is Heredoc and Nowdoc in PHP?
6. What is the difference between double and single inverted commas?
7. What is here document in Linux?
8. What is the difference between single and double quotation marks?
9. Where is EOF defined?
10. What is Nowdoc PHP?

Tags

1. #contain
2. #strings
3. #characters
4. #supported
5. #created
6. #variable
7. #alphanumeric
8. #declare
9. #types
10. #string
11. #assign
12. #variables