Php5.5 new array function array_column_PHP tutorial

The new array function array_column in php5.5. Php5.5 new array function paiphp5.5 new array function array_column

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If (! Function_exists ('Array _ column ')){ Function array_column ($ input, $ columnKey, $ indexKey = null ){ $ ColumnKeyIsNumber = (is_numeric ($ columnKey ))? True: false; $ IndexKeyIsNull = (is_null ($ indexKey ))? True: false; $ IndexKeyIsNumber = (is_numeric ($ indexKey ))? True: false; $ Result = array (); Foreach (array) $ input as $ key => $ row ){ If ($ columnKeyIsNumber ){ $ Tmp = array_slice ($ row, $ columnKey, 1 ); $ Tmp = (is_array ($ tmp )&&! Empty ($ tmp ))? Current ($ tmp): null; } Else { $ Tmp = isset ($ row [$ columnKey])? $ Row [$ columnKey]: null; } If (! $ IndexKeyIsNull ){ If ($ indexKeyIsNumber ){ $ Key = array_slice ($ row, $ indexKey, 1 ); $ Key = (is_array ($ key )&&! Empty ($ key ))? Current ($ key): null; $ Key = is_null ($ key )? 0: $ key; } Else { $ Key = isset ($ row [$ indexKey])? $ Row [$ indexKey]: 0; } } $ Result [$ key] = $ tmp; } Return $ result; } } // Example $ Records = array ( Array ( 'Id' => 2135, 'First _ name' => 'John ', 'Last _ name' => 'Doe' ), Array ( 'Id' => 3245, 'First _ name' => 'Sally ', 'Last _ name' => 'Smith' ), Array ( 'Id' => 5342, 'First _ name' => 'Jane ', 'Last _ name' => 'Jones' ), Array ( 'Id' => 5623, 'First _ name' => 'Peter ', 'Last _ name' => 'Doe' ) ); $ FirstNames = array_column ($ records, 'First _ name '); Print_r ($ firstNames ); /* Array ( [0] => John [1] => Sally [2] => Jane [3] => Peter ) */ $ Records = array ( Array (1, 'John', 'Doe '), Array (2, 'Sally ', 'Smith '), Array (3, 'Jane ', 'Jones ') ); $ LastNames = array_column ($ records, 2 ); Print_r ($ lastNames ); /* Array ( [0] => Doe [1] => Smith [2] => Jones ) */ $ MismatchedColumns = array ( Array ( 'A' => 'foo ', 'B' => 'bar ', 'E' => 'Baz' ), Array ( 'A' => 'qux ', 'C' => 'quux ', 'D' => 'corge' ), Array ( 'A' => 'graresult ', 'B' => 'garply ', 'E' => 'Waldo' ), ); $ Foo = array_column ($ mismatchedColumns, 'A', 'B '); Print_r ($ foo ); /* Array ( [Bar] => foo [0] => qux [Garply] => grault ) */

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