“_”后恢复数字和字符

Question

I want to extract with a regex every digit and characters that are after an underscore. I tried \_\d{1,3} but it didn't work at all.

Here is a sample of a chain that I need to manipulate: R_31_1_35_6a.

Here is the result I want:

array('31', '1', '35', '6a');

Answer 1

You can use explode to separate the string by underscores:

$string = "R_31_1_35_6a";
$result = explode('_', $string);

And then you can drop the first entry which is 'R' in this case:

array_shift($result);

This returns your expected result:

var_dump($result);