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when sorting a multi-dimensional array, $a and $b contain references to the first index of the array.
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Ultimo aggiornamento 2011-10-24
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note that the assignment copies the original variable to the new one (assignment by value), so changes to one will not affect the other. this may also have relevance if you need to copy something like a large array inside a tight loop. php 4 supports assignment by reference, using the $var = $othervar; syntax, but this is not possible in php 3. 'assignment by reference' means that both variables end up pointing at the same data, and nothing is copied anywhere. to learn more about references, please read references explained.
taka możliwość pojawiła się dopiero w php 4 i nie była dostępna w php 3. "przypisanie przez referencję" oznacza, że obydwie zmienne wskazują te same wartości, natomiast nic się nie kopiuje.
Ultimo aggiornamento 2011-10-24
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