function fn1()
{
global $rows;
global $row;
$a = "rows";
$b = "row";
// TYPICAL FOREACH
foreach ($rows as $row) {
fn2();
}
// USING VARIABLE VARIABLE
foreach (${$a} as ${$b}) {
fn2();
}
// THE MALFORMED ARRAY
foreach ($rows as $row) {
fn2();
}
}
function fn()
{
//echo "inside the function, \$var = ".$var."<br/>";
$var = "contents 2";
echo "inside the function, \$var = " . $var . "<br/>";
}
$var = "contents 1";
fn();
echo "outside the function, \$var = " . $var . "<br/>";
function fn2()
{
global $var;
$var = "contents";
echo "inside the function, \$var = " . $var . "<br/>";
}
fn2();
echo "outside the function, \$var = " . $var . "<br/>";
/*未改变原变量的引用*/
function increment1($value, $amount = 1)
{
$value = $value + $amount;
}
echo "without '&': <br/>";
$a1 = 10;
echo $a1 . "<br/>";
increment1($a1);
echo $a1 . "<br/>";
/*引用传递参数*/
function increment2(&$value, $amount = 1)
{
$value = $value + $amount;
function to_string()
{
return fn2('ecToString', atLeastOneArg(func_get_args()));
}
