echo "<hr/>\n"; showaRec($a3, 0); echo "<br/>\n"; // showMat also works for $a3 but it will not always for for nested arrays showMat($a3); echo "<hr/>\n"; // modify1 will not actually modify the arrays modify1($a1); modify1($a2); echo "<h3>After modify1 the arrays are:</h3>"; showa($a1); showa($a2); // modify2 will modify the parameters within the functions but leave the // argument arrays unchanged modify2($a1); modify2($a2); echo "<h3>After modify2 the arrays are:</h3>"; showa($a1); showa($a2); // modify3 will modify the argument arrays modify3($a1); modify3($a2); echo "<h3>After modify3 the arrays are:</h3>"; showa($a1); showa($a2); showaRec($a2, 0); echo "<hr/>\n"; // Demonstrating local vs. global variables globloc(); echo "Back in main: <br/>\n"; print_r($a1);
public $hello;
}
//参数不带&，只能改变object的property，没办法改变obj本身
function modify($obj)
{
$obj->hello = 'world (modified)!';
}
// 只有显示的 对参数 加上&（ampersand）,才能改变obj本身
function modify2($obj)
{
$obj = 32;
}
$obj = new Test();
$obj->hello = 'world';
modify($obj);
modify2($obj);
var_dump($obj->hello);
// outputs "world (modified!)"
// Example one
$arr1 = array(1);
echo "\nbefore:\n";
echo "\$arr1[0] == {$arr1[0]}\n";
$arr2 = $arr1;
$arr2[0]++;
echo "\nafter:\n";
echo "\$arr1[0] == {$arr1[0]}\n";
echo "\$arr2[0] == {$arr2[0]}\n";
// Example two
echo "\nExample2:\n";
$arr3 = array(1);
//xdebug_debug_zval('arr3');
