005+ Fatal error: Uncaught TypeError: Argument 2 passed to usort() must be callable, integer given in %s/usort_variation2.php:89
006+ Stack trace:
007+ #0 %s/usort_variation2.php(89): usort(Array, 0)
008+ #1 {main}
009+ thrown in %s/usort_variation2.php on line 89
005- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
006- NULL
007-
008- -- Iteration 2 --
009-
010- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
011- NULL
012-
013- -- Iteration 3 --
014-
015- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
016- NULL
017-
018- -- Iteration 4 --
019-
020- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
021- NULL
022-
023- -- Iteration 5 --
024-
025- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
026- NULL
027-
028- -- Iteration 6 --
029-
030- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
031- NULL
032-
033- -- Iteration 7 --
034-
035- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
036- NULL
037-
038- -- Iteration 8 --
039-
040- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
041- NULL
042-
043- -- Iteration 9 --
044-
045- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
046- NULL
047-
048- -- Iteration 10 --
049-
050- Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
051- NULL
052-
053- -- Iteration 11 --
054-
055- Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
056- NULL
057-
058- -- Iteration 12 --
059-
060- Warning: usort() expects parameter 2 to be a valid callback, array must have exactly two members in %s on line %d
061- NULL
062-
063- -- Iteration 13 --
064-
065- Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d
066- NULL
067-
068- -- Iteration 14 --
069-
070- Warning: usort() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d
071- NULL
072-
073- -- Iteration 15 --
074-
075- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
076- NULL
077-
078- -- Iteration 16 --
079-
080- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
081- NULL
082-
083- -- Iteration 17 --
084-
085- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
086- NULL
087-
088- -- Iteration 18 --
089-
090- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
091- NULL
092-
093- -- Iteration 19 --
094-
095- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
096- NULL
097-
098- -- Iteration 20 --
099-
100- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
101- NULL
102-
103- -- Iteration 21 --
104-
105- Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d
106- NULL
107-
108- -- Iteration 22 --
109-
110- Warning: usort() expects parameter 2 to be a valid callback, function '' not found or invalid function name in %s on line %d
111- NULL
112-
113- -- Iteration 23 --
114-
115- Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d
116- NULL
117-
118- -- Iteration 24 --
119-
120- Warning: usort() expects parameter 2 to be a valid callback, function 'string' not found or invalid function name in %s on line %d
121- NULL
122-
123- -- Iteration 25 --
124-
125- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
126- NULL
127-
128- -- Iteration 26 --
129-
130- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
131- NULL
132-
133- -- Iteration 27 --
134-
135- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
136- NULL
137-
138- -- Iteration 28 --
139-
140- Warning: usort() expects parameter 2 to be a valid callback, no array or string given in %s on line %d
141- NULL
142- ===DONE===