Question

I need to use a preg_match to get a file that matches a certain condition. For example, I want to find a file named “123-stack-overflow.txt”. There can be any characters after the 123- and before the .txt.

How can this be modified so it will work?

preg_match("/^$ID-(.+).txt/" , $name, $file);

Answer 1

Regexp ^123-.+\.txt$

^       # Match start of string
123-    # Match the literal string 123-
(.+)    # Match anything after (captured)
\.txt   # Match the literal string .txt 
$       # Match end of string

php:

$str="123-stack-overflow.txt";

preg_match('/^123-(.+)\.txt$/',$str,$match);
echo $match[0];
echo $match[1];

>>> 123-stack-overflow.txt
>>> stack-overflow