I've been looking for what seems like hours, and I just cannot find a solution for this. My regex skills are terrible but I'm sure for someone with the knowledge this will be easy.
/^(?:[1-9]{1,3}GB)|(?:[0-9]{1,2}.[0-9]{1,2}TB)$/i
As you can see it's pretty simple. I just need to match one or the other but I don't know where I'm going wrong.
Examples:
<?= $validate->data('100GB'); ?>
This should match since it's 3 digits followed by "GB."
<?= $validate->data('2.65TB'); ?>
This should also match since it's 1 digit followed by period, followed by two more digits, followed by "TB."
EDIT: I needed to modify the numeric count but still doesn't perform as expected.
For anyone interested, here is the final regex.
/^(?:[0-9]{1,3}(?:GB|TB))|(?:[0-9]{1,2}\.[0-9]{1,2}(?:GB|TB))$/i
You are not including zeros in your regex, that is why the pattern fails.
[1-9]{3} will only match three digits 1-9. So 111 is a match. 234 is also a match.
But 500 is not.
With this regex: ([0-9]{3}GB)|([0-9]{1,2}.[0-9]{1,2}TB) you will be able to catch the zeros and it will not limit you to two digit TB disks.
https://regex101.com/r/6undez/3
EDIT: In case you want to match 100 GB note the space. You can use this regex:
https://regex101.com/r/6undez/4([0-9]{3}\s?GB)|([0-9]{1,2}.[0-9]{1,2}\s?TB)
For increased efficiency and brevity (compared to the final pattern in the question), use this pattern:
/^(?:\d{1,3}|\d{1,2}\.\d{1,2})[GT]B$/i
Improvements:
\d instead of [0-9] for brevity[GT] for brevity/efficiencyIf you are going with Andreas' pattern, I'd recommend this:
/^(?:\d{1,3} ?GB)|(?:\d{1,2}(?:\.\d{1,2})? ?TB)$/i
Improvements:
\d instead of [0-9] for brevity\s for efficiency. for accuracy/efficiency