Check if is integer php

- Check if string is integer php
- Check if value is integer php
- Check if variable is integer php
- Check if number is integer php
- Php check if integer is in range
- Php check if number is integer or float
- Php check if float is integer
- Php check if value is integer or float
- Php check if string is integer number
- Php check if var is integer
- Php check if string is integer or float
- Php check if string is valid integer
- Php check if string is positive integer
- Php check if integer is odd or even
- Php check if integer is in array