How to check whether a string is empty in PHP

To check whether a given string is empty or not, we can use the built-in empty() function in PHP language.

The empty() function returns true if a string is empty; otherwise it returns false.

Here is an example:

$myString = "";

// True because $myString is empty
if (empty($myString)) {
  echo "String is empty.";
}else{
  echo "String is not empty.";
}

Output:

String is empty.

Similarly, we can also use the strlen() function to check for a empty string.

$myString = "";

if (strlen($myString < 0)) {
  echo "String is empty.";
}else{
  echo "String is not empty.";
}