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<?php function sortFunction( $a, $b ) { return strtotime($a["date"]) - strtotime($b["date"]); } $data = '[{"date":"2013-09-01 00:00:02","content":"1"}, {"date":"2013-09-01 00:00:09","content":"5"}, {"date":"2013-09-01 00:00:01","content":"3"}]'; usort($data, "sortFunction"); var_dump($data);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, string given in /in/nRtiQ:11 Stack trace: #0 /in/nRtiQ(11): usort('[{"date":"2013-...', 'sortFunction') #1 {main} thrown in /in/nRtiQ on line 11
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: usort() expects parameter 1 to be array, string given in /in/nRtiQ on line 11 string(160) "[{"date":"2013-09-01 00:00:02","content":"1"}, {"date":"2013-09-01 00:00:09","content":"5"}, {"date":"2013-09-01 00:00:01","content":"3"}]"
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: usort(): The argument should be an array in /in/nRtiQ on line 11 string(160) "[{"date":"2013-09-01 00:00:02","content":"1"}, {"date":"2013-09-01 00:00:09","content":"5"}, {"date":"2013-09-01 00:00:01","content":"3"}]"
Output for 4.3.0 - 4.3.1
Warning: usort() [http://www.php.net/function.usort]: The argument should be an array in /in/nRtiQ on line 11 string(160) "[{"date":"2013-09-01 00:00:02","content":"1"}, {"date":"2013-09-01 00:00:09","content":"5"}, {"date":"2013-09-01 00:00:01","content":"3"}]"

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