如何检查文件中是否存在特定字符串的文件？

Question

I'd like to be able to search a directory for a file that starts with a specific string, for example:

- foo
  - 1_foo.jpg
  - 2_bar.png

How would I check directory foo for files that begin with "1_"?

I've tried using file_exists and preg_match like so:
if (file_exists("foo/" . preg_match("/^1_/", "foo/*"))) echo "File exists.";
but this doesn't work.

Answer 1

Sounds like you need the glob() function. The glob() function searches for all the pathnames matching pattern according to the rules used by the libc glob() function, which is similar to the rules used by common shells.

<?php
foreach (glob('1_*.*') as $filename) {
    echo "$filename
";
}
?>

The above example will output something similar to:

1_foo.png
1_bar.png
1_something.png