This is an example of an escape slash: \
The escape slash (\) in PHP is used to escape special characters, such as double quotes (\") or backslashes (\\), in a string.
For example, when you need to include a double quote inside a double-quoted string:
$escapedString = "This is a double quote inside double quotes: \""; echo $escapedString;
The output will be:
This is a double quote inside double quotes: "