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<?php $array = [ [ 'avgvalue' => 0, 'timestamp' => '2011-02-04T11:00:00.000Z', ], [ 'avgvalue' => 268.3, 'timestamp' => '2011-02-04T12:00:00.000Z' ], ]; $result = []; foreach ($array as $row) { $result[substr($row['timestamp'], 0, 10)][] = $row; } var_export($result);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.17, 8.5.0 - 8.5.2
array ( '2011-02-04' => array ( 0 => array ( 'avgvalue' => 0, 'timestamp' => '2011-02-04T11:00:00.000Z', ), 1 => array ( 'avgvalue' => 268.3, 'timestamp' => '2011-02-04T12:00:00.000Z', ), ), )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
preferences:
203.37 ms | 407 KiB | 5 Q