Question

I try a regex, but the result is not really that I want.

This is my regex :

/^(([a-z]{0,})([0-9]+)).*/i

And this is my strings :

8500A.JPG //I need to get 8500A but I get 8500
0130799.JPG // I get the good result : 0130799

How to keep alphabetical characters before the .JPG ?

Answer 1

Looks like you may have been getting enclosing parenthesis confused.

inside the character class you can specify many ranges

/^([0-9A-Za-z]{0,})\.JPG$/

To break down what it is doing:

• ^ = start of line
• $ = end of line
• (…) = $1 will get anything in here
• [A-Za-z0-9] = match anything between A-Z, between a-z and between 0-9
• {0,} = 0 or more times
• . = escape so you use a literal “.”

More info here:
http://www.regextester.com/pregsyntax.html

Hope that helps