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

comparison.php:

Test run:

$ php comparison.php 
qwe: false
23: true
-23: true
23.0: false
-23.0: false