Better way to check variable for null or empty string?
// Function for basic field validation (present and neither empty nor only white spacefunction IsNullOrEmptyString($str){ return (!isset($str) || trim($str) === '');}
Old post but someone might need it as I did ;)
if (strlen($str) == 0){do what ever}replace $str with your variable.NULL and "" both return 0 when using strlen.
Use PHP's empty() function. The following things are considered to be empty
"" (an empty string)0 (0 as an integer)0.0 (0 as a float)"0" (0 as a string)NULLFALSEarray() (an empty array)$var; (a variable declared, but without a value)For more details check empty function