How can I unescape a string in PHP?

When a string in PHP contains escaped characters (such as \n for newline or \t for tab), you can unescape the string by using the built-in function `stripslashes()`. This function removes the backslashes before special characters, effectively unescaping the string.

$escapedString = "Hello\\nWorld\\t";
$unescapedString = stripslashes($escapedString);

echo $unescapedString; // Output: Hello\nWorld\t