Function Argument Spacing

Function arguments should have one space after a comma, and single spaces surrounding the equals sign for default values.

Valid: Single spaces after a comma.

function foo($bar,<em> </em>$baz) { }

Invalid: No spaces after a comma.

function foo($bar,<em></em>$baz) { }

Valid: Single spaces around an equals sign in function declaration.

function foo($bar, $baz<em> </em>=<em> </em>true) { }

Invalid: No spaces around an equals sign in function declaration.

function foo($bar, $baz<em></em>=<em></em>true) { }