note 130634 added to function.array-diff-assoc

Handy function to compare value changes between arrays, based on array_diff_assoc(). Valid for PHP 7.4+ due to the use of arrow functions as a shorthand, but may be "downgraded" as well. <?php function array_changes($amDataOld, $amDataNew) { $fnDiffGroup = fn ($sDiffKey) => [ 'old' => ($amDataOld[$sDiffKey] ?? NULL), 'new' => ($amDataNew[$sDiffKey] ?? NULL), ]; $asDataOld = array_map('serialize', $amDataOld); $asDataNew = array_map('serialize', $amDataNew); $asDiffKeys = array_keys( array_diff_assoc($asDataOld, $asDataNew) + array_diff_assoc($asDataNew, $asDataOld) ); return array_combine($asDiffKeys, array_map($fnDiffGroup, $asDiffKeys)); } $a1 = [ 'SameValue' => 230.0, 'SameArray' => ['foo' => 'FOO', 'bar' => 'BAR'], 'DiffValue' => 48.25, 'DiffTypeSimple' => 100.1, 'DiffTypeComplex' => 27.8, 'DiffTypeArray' => ['foo' => 'FOO', 'bar' => 'BAR'], ]; $a2 = [ 'SameValue' => 230.0, 'SameArray' => ['foo' => 'FOO', 'bar' => 'BAR'], 'DiffValue' => 41.5, 'DiffTypeSimple' => '100.1', 'DiffTypeComplex' => ['foo' => 'FOO', 'bar' => 'BAZ'], 'DiffTypeArray' => ['foo' => 'FOO', 'bar' => 'BAZ'], ]; var_dump(array_changes($a1, $a2)); ?> ---- Server IP: 206.189.2.9 Probable Submitter: 77.24.107.73 ---- Manual Page -- https://php.net/manual/en/function.array-diff-assoc.php Edit -- https://main.php.net/note/edit/130634 Del: integrated -- https://main.php.net/note/delete/130634/integrated Del: useless -- https://main.php.net/note/delete/130634/useless Del: bad code -- https://main.php.net/note/delete/130634/bad+code Del: spam -- https://main.php.net/note/delete/130634/spam Del: non-english -- https://main.php.net/note/delete/130634/non-english Del: in docs -- https://main.php.net/note/delete/130634/in+docs Del: other reasons-- https://main.php.net/note/delete/130634 Reject -- https://main.php.net/note/reject/130634 Search -- https://main.php.net/manage/user-notes.php