function

[chiprivers]

Is it possible to create a function with an optional varable such as:

function doThis($x) {
blah blah
}

But where specifying $x is optional.  Then how do I check to see if $x is declared and get an alternative value if not?

[jwk811]

you could just set $x = "" or null

[wildteen88]

The only way to make an optional variable (parameter) for a function is to provide a default value if that parameter is not passed to the function when called.