X, as long as there's a word at the beginning of the file.
| The code is as follows |
Copy Code |
| $discuz = & Discuz_core::instance ();
[code language=php] The //instance () belongs to the Discuz_core class in the class_core.php
function &instance () {
static $object;
If Empty ($object ) {
$object = new Discuz_core ();
}
return $object;
}
[/code]
guarantees that word requests use a Discuz_core instance. The & is written here to be compatible with PHP4, and if you are in PHP5, you can use static.
[code language=php]
///This is a simple example of a single piece pattern.
Class Phpig {
private static $v = null;
static function instance () {
if (self:: $v = null) {
&N bsp; self:: $v = new Phpig ();
}
return self:: $v;
}
$pig 1 = phpig::instance ();
$pig 2 = phpig::instance ();
if ($pig 1 = = $pig 2) {
echo ' same object ';
else {
echo ' is not the same object ';
}
[/code] |
