Checking if a string contains an integer

Question

Do you know of a function that can check if a string contains an integer?

Here\'s how I\'d expect it to work:

holds_int(\"23\") // should return true         


        

Answer 1

If you use Assert library in you project (https://github.com/beberlei/assert) you can easily do it in one line:

Assertion::integerish($var);

Note: it throws an exception in case of violation the assertion.