Php check if empty string
- Php check if empty string or null
- Php check if string empty whitespace
- Php check if variable is empty string
- Php check if value is empty string
- Php check if variable is empty string or null
- Php check if variable is not empty string
- Php check if not null or empty string
- Php check if string is empty or spaces
- Php check if value is null or empty string
- Php check if query string is empty
- Check if array contains empty string php