正则表达式帮助：匹配以下划线开头的任何图像文件

Question

The statement below will load all images that do not begin with an underscore character...

if (!is_dir($file) && preg_match("/^[^_].*\.(bmp|jpeg|gif|png|jpg)$/i", $file)) 

I need to modify it so that it only loads images that DO BEGIN with an underscore.

Answer 1

Just remove the negation on the character set: [^_] becomes _:

if (!is_dir($file) && preg_match("/^_.*\.(bmp|jpeg|gif|png|jpg)$/i", $file))