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19 years ago
Problem:

I have loaded an array with the results of a database

query.  The Fields are 'FirstName' and 'LastName'.



I would like to find a way to contactenate the two

fields, and then return only unique values for the

array.  For example, if the database query returns

three instances of a record with the FirstName John

and the LastName Smith in two distinct fields, I would

like to build a new array that would contain all the

original fields, but with John Smith in it only once.

Thanks for: Colin Campbell



Solution:



<?php

/**

 * The same thing than implode function, but return the keys so

 *

 * <code>

 * $_GET = array('id' => '4587','with' => 'key');

 * ...

 * echo shared::implode_with_key('&',$_GET,'='); // Resultado: id=4587&with=key

 * ...

 * </code>

 *

 * @param string $glue Oque colocar entre as chave => valor

 * @param array $pieces Valores

 * @param string $hifen Separar chave da array do valor

 * @return string

 * @author memandeemail at gmail dot com

 */

function implode_with_key($glue = null, $pieces, $hifen = ',') {

  $return = null;

  foreach ($pieces as $tk => $tv) $return .= $glue.$tk.$hifen.$tv;

  return substr($return,1);

}



/**

 * Return unique values from a tree of values

 *

 * @param array $array_tree

 * @return array

 * @author memandeemail at gmail dot com

 */

function array_unique_tree($array_tree) {

  $will_return = array(); $vtemp = array();

  foreach ($array_tree as $tkey => $tvalue) $vtemp[$tkey] = implode_with_key('&',$tvalue,'=');

  foreach (array_keys(array_unique($vtemp)) as $tvalue) $will_return[$tvalue] = $array_tree[$tvalue];

  return $will_return;

}



$problem = array_fill(0,3,

array('FirstName' => 'John', 'LastName' => 'Smith')

);



$problem[] = array('FirstName' => 'Davi', 'LastName' => 'S. Mesquita');

$problem[] = array('FirstName' => 'John', 'LastName' => 'Tom');



print_r($problem);



print_r(array_unique_tree($problem));

?>
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