Preg_match PHP —模式匹配

Question

trying to understand preg_match, struggling to understand how to write and how to access what it has matched. For example:

Every single movie name I have is in the format--

MOVIE NAME (YEAR)

eg Alice in Wonderland (2010)

I want to be able to get the movie title into a different variable from the string.

A few movies have parentheses outside of the year -- as in, The movie (Has One of These) (2008)

I'm iterating over an array of strings as well -- so I basically need to use preg_match to get to \\([0-9]{4}\\)$ (is $ the mark of an end of the line?) and then the rest of the string without that year as well in two variables.

Can anyone possibly help?

EDIT: Huh. I swear I typed \\ . When I type \\( it went into ( because I didn't double escape. Anyway, thank you guys very much! The site you linked it also awesome (helped with array problems, I didn't realize it kept full string at 0 as well).

Answer 1

well if your pattern is: SOMETHING + (YEAR) then your regex should be like this:

 #^(.+)\((\d{4})\)$#

Explanation:

 # -> pattern delimiter
 ^ -> beginning of string
 (.+) -> any character "." once or more "+"
 \( -> escape parenthesis character
 \d{4} -> four digits
 \) -> escape parenthesis character
 $ -> end of string

Example

Answer 2

Looking for patterns in these lines:

Alice in Wonderland (2010)
The movie (Has One of These) (2008)

You suggested in your question to use the following regular expression:

([0-9]{4})$

to match the year at the end of the line. $ is infact a marker for the end of the line, however, the ) is a special character in a regular expression that needs to be slashed to work:

\(([0-9]{4})\)$
  ^         ^^ both brackets have been slashed to match them literally
  '- subgroup parenthesis.

or by using \\d for any decimal number:

\((\d{4})\)$

This will make subgroup 1 contain the year.

Answer 3

This is one of the link where regex man be made

You also can use following for decimal number

\((\d{4})\)$

Answer 4

这是一个在线正则表达式测试仪，在学习正则表达式并对其进行测试时非常有用： HiFi Regex Tester 。