[10.x] Add str()->take($limit)

[moshe-autoleadstar]

Take the first or last {$limit} characters.

Before

str('abcdef')->substr(0, 2) // 'ab'

After

str('abcdef')->take(2) // 'ab'

[taylorotwell]

Hey there - cool method but would have to be added to Str too.

[moshe-autoleadstar]

Added! #48467