The documentation says, "The default value must be a
constant expression, not (for example) a variable, a class
member or a function call."
Class constants (and presumably global constants) can be
used:
<?php
class Foo {
const BAR = "constant value";
public function myMethod($arg = self::BAR) {
echo $arg; // IT WORKS!
}
}
?>
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Manual Page --
http://www.php.net/manual/en/functions.arguments.php
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