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unterschied zwischen =& und =

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momentan treffe ich bei den pear-packages vieler orts auf folgende schreibweise:

while ($row =& $res->fetchRow()) {

echo $row['title_long'] . "";



$DB =& DB::connect("mysql://bla:gna@localhost/hua");

ist das irgendwie zentral, ob = oder =& ?

wo liegt der unterschied. habe dazu wenig gefunden im netz...

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