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<?php $original = [ '0' => 'string 0', true => 'boolean true', 2.35 => 'float 2.35', '3.5' => 'string 3.5', ]; $keysToBeConsidered = ['0', true, 2.35, '3.5']; var_dump($original); // Original logic. $array = $original; foreach (array_keys($array) as $key) { if (!in_array($key, $keysToBeConsidered, true)) { unset($array[$key]); } } var_dump($array); // Proposed logic. $filtered_array = []; foreach ($keysToBeConsidered as $key) { if (isset($original[$key])) { $filtered_array[$key] = $original[$key]; } } var_dump($filtered_array);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Deprecated: Implicit conversion from float 2.35 to int loses precision in /in/FdReu on line 6 array(4) { [0]=> string(8) "string 0" [1]=> string(12) "boolean true" [2]=> string(10) "float 2.35" ["3.5"]=> string(10) "string 3.5" } array(1) { ["3.5"]=> string(10) "string 3.5" } Deprecated: Implicit conversion from float 2.35 to int loses precision in /in/FdReu on line 26 Deprecated: Implicit conversion from float 2.35 to int loses precision in /in/FdReu on line 27 Deprecated: Implicit conversion from float 2.35 to int loses precision in /in/FdReu on line 27 array(4) { [0]=> string(8) "string 0" [1]=> string(12) "boolean true" [2]=> string(10) "float 2.35" ["3.5"]=> string(10) "string 3.5" }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
array(4) { [0]=> string(8) "string 0" [1]=> string(12) "boolean true" [2]=> string(10) "float 2.35" ["3.5"]=> string(10) "string 3.5" } array(1) { ["3.5"]=> string(10) "string 3.5" } array(4) { [0]=> string(8) "string 0" [1]=> string(12) "boolean true" [2]=> string(10) "float 2.35" ["3.5"]=> string(10) "string 3.5" }
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/FdReu on line 3
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/FdReu on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/FdReu on line 3
Process exited with code 255.
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