<?php
echo myFunc(1);
?>;
 

 <?php
$r = mysql_fetch_assoc(getData($sql));
echo ;
?>; 

 <?php
function myFunc($arg1) {
  if($arg1 >= 5) { return true; }
  else { return false; }
}

function myFunc($\arg1) {
  if($arg1==5) {  = "Equal to 5"; }
  else { $val = "Not equal to 5"; }
  return $val;
}
?> 

 <?php
function myFunc($arg1="defaultValue", $arg2="defaultValue2") {
  //if the function is called like this...
  //myFunc(), then it will use defaultValue and defaultValue2 as
  //$arg1 and $arg2 respectively
}
?>;