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(PHP 4 >= 4.2.0, PHP 5)
array_change_key_case — Ändert alle Schlüssel in einem Array
Gibt ein Array zurück, in dem alle Schlüssel aus input in Klein- oder Großbuchstaben umgewandelt wurden. Numerische Indizes werden nicht geändert.
Das Eingabe-Array
Entweder CASE_UPPER oder CASE_LOWER (Standard)
Gibt ein Array zurück, dessen Schlüssel in Klein- oder Großbuchstaben umgewandelt wurden, oder FALSE, wenn input kein Array ist.
Wirft E_WARNING, wenn input kein Array ist.
Beispiel #1 array_change_key_case()-Beispiel
<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
Array
(
[FIRST] => 1
[SECOND] => 4
)
Hinweis:
Hat ein Array Indizes, die nach einem Durchlauf durch diese Funktion gleich sind (z.B. "keY" und "kEY"), überschreibt der spätere Wert im Array andere Indizes.
<?php
// improving the previous script
function ack_r3(&$array, $case=CASE_LOWER, $flag_rec=false)
{
$array = array_change_key_case($array, $case);
if ( $flag_rec ) {
foreach ($array as $key => $value) {
if ( is_array($value) ) {
ack_r3($array[$key], $case, true);
}
}
}
}
// same of array_change_key_case
$arr = array('ID' => 1, 'NAME'=> 'Luis', 'Contact' => array('PHONE' => '3010-7148', 'E-MAIL' => 'luis@net.com') );
ack_r3($arr, CASE_LOWER,false);
var_dump($arr);
$arr = array('ID' => 1, 'NAME'=> 'Luis', 'Contact' => array('PHONE' => '3010-7148', 'E-MAIL' => 'luis@net.com') );
ack_r3($arr, CASE_LOWER,true);
var_dump($arr);
?>
outputs:
array(3) {
["id"]=>
int(1)
["name"]=>
string(4) "Luis"
["contact"]=>
array(2) {
["PHONE"]=>
string(9) "3010-7148"
["E-MAIL"]=>
string(12) "luis@net.com"
}
}
array(3) {
["id"]=>
int(1)
["name"]=>
string(4) "Luis"
["contact"]=>
array(2) {
["phone"]=>
string(9) "3010-7148"
["e-mail"]=>
string(12) "luis@net.com"
}
}
Script to change case of sub-arrays keys:
<?php
function arrKey2Lower(&$arrVals) {
foreach( $arrVals as $key => $item ) {
$key2 = strtolower($key);
if ( $key2 != $key) {
unset($arrVals[$key]);
$arrVals[$key2]=$item;
$key=$key2;
}
if ( is_array($item) ) { arrKey2Lower($arrValores[$key]); }
}
}
$arr = array('ID' => 1, 'NAME'=> 'Luis', 'Contact' => array('PHONE' => '3010-7148', 'E-MAIL' => 'luis@net.com') );
arrKey2Lower($arr);
var_dump($arr);
?>
outputs:
array(3) {
["id"]=>
int(1)
["name"]=>
string(4) "Luis"
["contact"]=>
array(2) {
["phone"]=>
string(9) "3010-7148"
["e-mail"]=>
string(12) "luis@net.com"
}
}
Simple function to change multidimensional array's all values to uppercase. If you would like to change to lowercase then change "mb_strtoupper" to "mb_strtolower". It works perfect for me ;)
<?php
function change_case_recursive($arr){
foreach ($arr as $key=>$val){
if (!is_array($arr[$key])){
$arr[$key]=mb_strtoupper($arr[$key]);
}else{
$arr[$key]=change_case_recursive($arr[$key]);
}
}
return $arr;
}
?>
Same as array_change_key_case only with the values. This should really be part of PHP!
<?php
/**
* @brief Returns an array with all values lowercased or uppercased.
* @return array Returns an array with all values lowercased or uppercased.
* @param object $input The array to work on
* @param int $case [optional] Either \c CASE_UPPER or \c CASE_LOWER (default).
*/
function array_change_value_case(array $input, $case = CASE_LOWER) {
switch ($case) {
case CASE_LOWER:
return array_map('strtolower', $input);
break;
case CASE_UPPER:
return array_map('strtoupper', $input);
break;
default:
trigger_error('Case is not valid, CASE_LOWER or CASE_UPPER only', E_USER_ERROR);
return false;
}
}
?>
<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
Below is a recursive version of this function.
<?php
/**
* A recursive array_change_key_case function.
* @param array $input
* @param integer $case
*/
function array_change_key_case_recursive($input, $case = null){
if(!is_array($input)){
trigger_error("Invalid input array '{$array}'",E_USER_NOTICE); exit;
}
// CASE_UPPER|CASE_LOWER
if(null === $case){
$case = CASE_LOWER;
}
if(!in_array($case, array(CASE_UPPER, CASE_LOWER))){
trigger_error("Case parameter '{$case}' is invalid.", E_USER_NOTICE); exit;
}
$input = array_change_key_case($input, $case);
foreach($input as $key=>$array){
if(is_array($array)){
$input[$key] = array_change_key_case_recursive($array, $case);
}
}
return $input;
}
?>
multibyte and multi-dimensional-array support, have fun!
<?php
define('ARRAY_KEY_FC_LOWERCASE', 25); //FOO => fOO
define('ARRAY_KEY_FC_UPPERCASE', 20); //foo => Foo
define('ARRAY_KEY_UPPERCASE', 15); //foo => FOO
define('ARRAY_KEY_LOWERCASE', 10); //FOO => foo
define('ARRAY_KEY_USE_MULTIBYTE', true); //use mutlibyte functions
/**
* change the case of array-keys
*
* use: array_change_key_case_ext(array('foo' => 1, 'bar' => 2), ARRAY_KEY_UPPERCASE);
* result: array('FOO' => 1, 'BAR' => 2)
*
* @param array
* @param int
* @return array
*/
function array_change_key_case_ext(array $array, $case = 10, $useMB = false, $mbEnc = 'UTF-8') {
$newArray = array();
//for more speed define the runtime created functions in the global namespace
//get function
if($useMB === false) {
$function = 'strToUpper'; //default
switch($case) {
//first-char-to-lowercase
case 25:
//maybee lcfirst is not callable
if(!function_exists('lcfirst'))
$function = create_function('$input', '
return strToLower($input[0]) . substr($input, 1, (strLen($input) - 1));
');
else $function = 'lcfirst';
break;
//first-char-to-uppercase
case 20:
$function = 'ucfirst';
break;
//lowercase
case 10:
$function = 'strToLower';
}
} else {
//create functions for multibyte support
switch($case) {
//first-char-to-lowercase
case 25:
$function = create_function('$input', '
return mb_strToLower(mb_substr($input, 0, 1, \'' . $mbEnc . '\')) .
mb_substr($input, 1, (mb_strlen($input, \'' . $mbEnc . '\') - 1), \'' . $mbEnc . '\');
');
break;
//first-char-to-uppercase
case 20:
$function = create_function('$input', '
return mb_strToUpper(mb_substr($input, 0, 1, \'' . $mbEnc . '\')) .
mb_substr($input, 1, (mb_strlen($input, \'' . $mbEnc . '\') - 1), \'' . $mbEnc . '\');
');
break;
//uppercase
case 15:
$function = create_function('$input', '
return mb_strToUpper($input, \'' . $mbEnc . '\');
');
break;
//lowercase
default: //case 10:
$function = create_function('$input', '
return mb_strToLower($input, \'' . $mbEnc . '\');
');
}
}
//loop array
foreach($array as $key => $value) {
if(is_array($value)) //$value is an array, handle keys too
$newArray[$function($key)] = array_change_key_case_ex($value, $case, $useMB);
elseif(is_string($key))
$newArray[$function($key)] = $value;
else $newArray[$key] = $value; //$key is not a string
} //end loop
return $newArray;
}
?>
Basically this is the function if your version is lower than 4.2.0
<?php
if ( !defined('CASE_LOWER') )define('CASE_LOWER', 0);
if ( !defined('CASE_UPPER') )define('CASE_UPPER', 1);
if(!function_exists("array_change_key_case")){
function array_change_key_case($input, $case=0){
if(!is_array($input))return FALSE;
$product = array();
foreach($input as $key => $value){
if($case){ //Upper
$key2 = ( (is_string($key)) ? (strtoupper($key)) : ($key) );
$product[$key2] = $value;
}
else{ //Lower
$key2 = ( (is_string($key)) ? (strtolower($key)) : ($key) );
$product[$key2] = $value;
}
}
return $product;
}/* endfunction array_change_key_case */
}/* endfunction exists array_change_key_case*/
?>
<?php
function array_change_value_case($input, $case = CASE_LOWER)
{
$aRet = array();
if (!is_array($input))
{
return $aRet;
}
foreach ($input as $key => $value)
{
if (is_array($value))
{
$aRet[$key] = array_change_value_case($value, $case);
continue;
}
$aRet[$key] = ($case == CASE_UPPER ? strtoupper($value) : strtolower($value));
}
return $aRet;
}
?>
I just changed the code a little bit so you havent got a code that repeats itself.
<?php
function array_change_key_case_secure($array = array(), $case = CASE_UPPER){
$secure = array();
$functionWrap = array(CASE_UPPER => 'strtoupper',
CASE_LOWER => 'strtolower');
foreach($array as $key => $val){
if(isset($functionWrap[$key])){
$key = $functionWrap[$case]($key);
$secure[$key][] = $val;
} else {
die('Not a known Type');
}
}
foreach($secure as $key => $val){
if(count($secure[$key]) == 1){
$secure[$key] = $val[0];
}
}
return $secure;
}
$myArray = array('A' => 'Hello',
'B' => 'World',
'a' => 'how are you?');
print_r($myArray);
$myArray = array_change_key_case_secure($myArray);
print_r($myArray);
/*
Array
(
[A] => Hello
[B] => World
[a] => how are you?
)
Array
(
[A] => Array
(
[0] => Hello
[1] => how are you?
)
[B] => World
)
*/
This functionality is now implemented in the PEAR package PHP_Compat.
More information about using this function without upgrading your version of PHP can be found on the below link:
http://pear.php.net/package/PHP_Compat
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