Occurrences of a sentence/word/char in a sentence - count only words (no regex if possible) (PHP) [duplicate]

Occurrences of a sentence/word/char in a sentence - count only words (no
regex if possible) (PHP) [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/15191126/occurrences-of-a-sentence-word-char-in-a-sentence-count-only-words-no-regex-i

Reference NO 2

http://stackoverflow.com/questions/11389048/sentence-with-specific-size-and-boundaries-detection

Reference NO 3

http://www.phpro.org/tutorials/Introduction-to-PHP-Regex.html

Reference NO 4

http://php.net/manual/en/function.str-word-count.php

Reference NO 5

http://weblogtoolscollection.com/regex/

Reference NO 6

https://developer.gnome.org/glib/2.37/glib-regex-syntax.html

Reference NO 7

http://www.codecodex.com/wiki/Count_the_number_of_occurrences_of_a_specific_character_in_a_string

Reference NO 8

http://msdn.microsoft.com/en-us/library/3206d374.aspx