Appending to / concatenating multiple strings in one call in PHP?

Appending to / concatenating multiple strings in one call in PHP?

References

Reference NO 1

http://stackoverflow.com/questions/13634784/appending-to-concatenating-multiple-strings-in-one-call-in-php

Reference NO 2

http://stackoverflow.com/questions/695124/what-is-the-best-way-to-add-two-strings-together

Reference NO 3

http://www.sitepoint.com/high-performance-string-concatenation-in-php/

Reference NO 4

http://php.net/manual/en/language.operators.string.php

Reference NO 5

http://www.tutorialspoint.com/php/php_strings.htm

Reference NO 6

http://www.phptherightway.com/pages/The-Basics.html

Reference NO 7

http://www.sitecrafting.com/blog/php-string-concat-vs-array/

Reference NO 8

http://phphowto.blogspot.com/2006/12/concatenate-strings.html