How can you efficiently remove the first 22 characters from a variable in PHP?

To efficiently remove the first 22 characters from a variable in PHP, you can use the `substr()` function. This function allows you to extract a substring from a string starting at a specified position. By using `substr($variable, 22)`, you can remove the first 22 characters from the variable and store the result back in the variable.

$variable = "This is a sample string with more than 22 characters.";
$variable = substr($variable, 22);
echo $variable;