Simple PHP text manipulation script

Given a text file in Chinese characters with spaces between words, and a finite number of possible punctuation marks [。，！；：？. , 、 ! ? ; : ] Text file may be divided into multiple chapters, each with a number "Chapter1" "Chapter2" etc. as the first word of the chapter; can be preceded or followed by a special character if this will help processing Write a php script to do the following: 1. Eliminate punctuation marks. 2. Read words one by one (dividing at spaces) 3. Count unique words. 4. Output a list of each unique word with its count and lowest chapter number where the word appears to screen and to a text file.