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<?php // Simple array merging $array1 = [10, 50, 20, 40, 30]; $array2 = [1.0, 5.0, 2.0, 4.0, 3.0]; print_r(array_merge($array1, $array2)); // Sorting table-like arrays that has sorted by key elements $table1 = [ '2011:london' => ['city' => 'London', 'year' => 2011, 'birthrate' => 'over9000'], '2012:birmingham' => ['city' => 'Birmingham', 'year' => 2012, 'birthrate' => 'wat'], '2013:london' => ['city' => 'London', 'year' => 2013, 'birthrate' => 'boo boo'] ]; $table2 = [ '2011:london' => ['city' => 'London', 'year' => 2011, 'comment' => 1], '2012:london' => ['city' => 'London', 'year' => 2012, 'comment' => 22], '2014:london' => ['city' => 'London', 'year' => 2014, 'comment' => 333] ]; print_r(array_linear_merge($table1, $table2)); // New func for merging sorted by unique key table-like arrays! // Complexity O(m+n), where m and n are sizes of each array. function array_linear_merge($array1, $array2) { $iterator1 = new ArrayIterator($arrayLeft); $iterator2 = new ArrayIterator($arrayRight); $result = []; while ($iterator1->valid() && $iterator2->valid()) { switch(sign(strcmp($iterator1->key(), $iterator2->key()))) { case 1: $result[] = $iterator2->current(); $iterator2->next(); break; case 0: $result[] = array_merge($iterator1->current(), $iterator2->current()); $iterator1->next(); $iterator2->next(); break; case -1: $result[] = $iterator1->current(); $iterator1->next(); break; } } if (!$iterator1->valid()) { $iterator1 = $iterator2; } while ($iterator1->valid()) { $result[] = $iterator1->current(); $iterator1->next(); } return $result; } function sign($number) { return ($n > 0) - ($n < 0); }
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
Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Warning: Undefined variable $arrayLeft in /in/pTClp on line 24 Fatal error: Uncaught TypeError: ArrayIterator::__construct(): Argument #1 ($array) must be of type array, null given in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.
Output for 7.0.18 - 7.0.33, 7.1.4 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Notice: Undefined variable: arrayLeft in /in/pTClp on line 24 Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.
Output for 7.0.0 - 7.0.17, 7.1.0 - 7.1.3
Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Notice: Undefined variable: arrayLeft in /in/pTClp on line 24 Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object, using empty array instead in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Array ( [0] => 10 [1] => 50 [2] => 20 [3] => 40 [4] => 30 [5] => 1 [6] => 5 [7] => 2 [8] => 4 [9] => 3 ) Notice: Undefined variable: arrayLeft in /in/pTClp on line 24 Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Passed variable is not an array or object, using empty array instead' in /in/pTClp:24 Stack trace: #0 /in/pTClp(24): ArrayIterator->__construct(NULL) #1 /in/pTClp(19): array_linear_merge(Array, Array) #2 {main} thrown in /in/pTClp on line 24
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/pTClp on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/pTClp on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pTClp on line 4
Process exited with code 255.
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