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Top Forums UNIX for Dummies Questions & Answers Formatting data in a raw file by using another mapping file Post 302762987 by DGPickett on Tuesday 29th of January 2013 10:34:47 AM
Old 01-29-2013
Put the input keys in a simple array, then for each record, put each field in an associative array keyed to the input name, then write the output using the unchanging ordered list of input names for each output field to fetch the fields from the associative array.
 

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ARRAY_COLUMN(3) 							 1							   ARRAY_COLUMN(3)

array_column - Return the values from a single column in the input array

SYNOPSIS
array array_column (array $array, mixed $column_key, [mixed $index_key = null]) DESCRIPTION
array_column(3) returns the values from a single column of the $array, identified by the $column_key. Optionally, you may provide an $index_key to index the values in the returned array by the values from the $index_key column in the input array. PARAMETERS
o $array - A multi-dimensional array (record set) from which to pull a column of values. o $column_key - The column of values to return. This value may be the integer key of the column you wish to retrieve, or it may be the string key name for an associative array. It may also be NULL to return complete arrays (useful together with $index_key to reindex the array). o $index_key - The column to use as the index/keys for the returned array. This value may be the integer key of the column, or it may be the string key name. RETURN VALUES
Returns an array of values representing a single column from the input array. EXAMPLES
Example #1 Get column of first names from recordset <?php // Array representing a possible record set returned from a database $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', ) ); $first_names = array_column($records, 'first_name'); print_r($first_names); ?> The above example will output: Array ( [0] => John [1] => Sally [2] => Jane [3] => Peter ) Example #2 Get column of last names from recordset, indexed by the "id" column <?php // Using the $records array from Example #1 $last_names = array_column($records, 'last_name', 'id'); print_r($last_names); ?> The above example will output: Array ( [2135] => Doe [3245] => Smith [5342] => Jones [5623] => Doe ) PHP Documentation Group ARRAY_COLUMN(3)
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