Better way to check variable for null or empty string?

Here is the simple PHP function for testing given data is null or empty string.

function IsNullOrEmptyString($data){
    return (!isset($data) || trim($data)==='');
}

function IsNullOrEmptyString($data){

return (!isset($data) || trim($data)==='');

}

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Arjun

I am Arjun from Hyderabad (India). I have been working as a software engineer from last 7+ years, and its my passion to learn new things and implement them as a practice. Aside from work, I likes gardening and spending time with pets.