bless function
| From: | Francisco M. Marzoa Alonso | Date: | Wed, 27 Oct 2004 14:10:15 +0000 |
| Subject: | bless function | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-200442@lists.php.net to get a copy of this message | ||
Ok, I think I've got it now. The code is autoexplicative, the only restriction is that the object must be converted to an array using the function obj2array instead of a direct cast. There's another ways to do this without the needless of that obj2array function, but I think this is not really a limitation.
Here it is:
<?
function obj2array ( &$Instance ) {
$clone = (array) $Instance;
$rtn = $clone;
while ( list ($key, $value) = each ($clone) ) {
$aux = explode ("\0", $key);
$newkey = $aux[count($aux)-1];
if ( $newkey != $key ) {
$rtn[$newkey] = &$rtn[$key];
$rtn['___FAKE_KEYS_'][] = $newkey;
}
}
return $rtn;
}
function bless ( &$Instance, $Class ) {
if ( ! (is_array ($Instance) ) ) {
return NULL;} // First drop faked keys if available foreach ( $Instance['___FAKE_KEYS_'] as $fake_key ) {
unset ($Instance[$fake_key]);} unset ( $Instance['___FAKE_KEYS_'] ); // Get serialization data from array $serdata = serialize ( $Instance ); /* For an array serialized data seems to meant:
array_tag:array_count:{array_elems}
array_tag is always 'a'
array_count is the number of elements in the array
array_elems are the elemens in the array
For an object seems to meant:
object_tag:object_class_name_len:"object_class_name":object_count:{object_members}
object_tag is always 'O'
object_class_name_len is the length in chars of object_class_name string
object_class_name is a string with the name of the class
object_count is the number of object members
object_members is the object_members itself (exactly equal to array_elems)
*/
list ($array_params, $array_elems) = explode ('{', $serdata, 2);
list ($array_tag, $array_count) = explode (':', $array_params, 3 );
$serdata = "O:".strlen ($Class).":\"$Class\":$array_count:{".$array_elems;
$Instance = unserialize ( $serdata );
return $Instance;
}
class TestClass {
private $One=1;
protected $Two=2;
public $Three=3;
public function sum() {
return $this->One+$this->Two+$this->Three;} } $Obj = new TestClass (); //$Clone = (array) $Obj; $Clone = obj2array ( $Obj ); echo "As the original object:<br>"; print_r ($Obj); echo "<br><br>As an array:<br>"; print_r ($Clone); $Clone["One"]=7; $Clone["Two"]=7; $Clone["Three"]=7; bless ( $Clone, TestClass ); echo "<br><br>After blessing as a TestClass instance:<br>"; print_r ($Clone); echo "<br><br>Calling sum method: "; echo $Clone->sum(); echo "<br>The array was blessed! miracle!!! ;-)<br>"; ?> Hope someone appart from me find it useful. :-)