What are common syntax errors to look out for when storing IP addresses in PHP files?

Common syntax errors to look out for when storing IP addresses in PHP files include missing semicolons at the end of lines, using single quotes instead of double quotes for strings containing variables, and not properly escaping special characters. To avoid these errors, make sure to properly format your IP address strings within double quotes and escape any special characters if necessary.

$ip_address = "192.168.1.1";