What are common escape sequences used in PHP programming?

Common escape sequences used in PHP programming include \n for a new line, \t for a tab, \r for a carriage return, and \\ for a backslash. These escape sequences are used to insert special characters into strings in PHP. Example:

// Using escape sequences in PHP
echo "This is a new line\n";
echo "This is a tab\t";
echo "This is a carriage return\r";
echo "This is a backslash\\";