I have a usort function with a single line: return 0.
I tried to use it on an Array of stdClass objects, and it changes
their order, how is that possible?
I have a usort function with a single line: return 0. I tried to
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I have a usort function with a single line: return 0.
I tried to use it on an Array of stdClass objects, and it changes
their order, how is that possible?
The property you assume is called stability: A stable sorting algorithm will not change the order of elements that are equal.
php’s sorting functions are not stable (because non-stable sorts may be slightly faster). From the documentation of
usort:If you want a stable sorting algorithm, you must implement it yourself.