unctions shall be called with no spaces between the function name, the opening parenthesis, and the first parameter; spaces between commas and each parameter, and no space between the last parameter, the closing parenthesis, and the semicolon. Here's an example:
$var = foo($bar, $baz, $quux);
As displayed above, there should be one space on either side of an equals sign used to assign the return value of a function to a variable. In the case of a block of related assignments, more space may be inserted to promote readability:
$short = foo($bar); $long_variable = foo($baz);
Function declarations follow the unix convention:
function fooFunction($arg1, $arg2 = '') { if (condition) { statement; } return $val; }
Arguments with default values go at the end of the argument list. Always attempt to return a meaningful value from a function if one is appropriate. Here is a slightly longer example:
function connect(&$dsn, $persistent = false) { if (is_array($dsn)) { $dsninfo = &$dsn; } else { $dsninfo = DB::parseDSN($dsn); } if (!$dsninfo || !$dsninfo['phptype']) { return $this->raiseError(); } return true; }