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($myArray);
/*
Array
(
[A] => Hello
[B] => World
[a] => how are you?
)
Array
(
[A] => Array
(
[0] => Hello
[1] => how are you?
)
[B] => World
)
*/
array_change_key_case
说明
array array_change_key_case ( array input [, int case] )
array_change_key_case() 将 input
数组中的所有键名改为全小写或大写。改变是根据后一个选项 case
参数来进行的。可以在这里用两个常量，CASE_UPPER 和
CASE_LOWER。默认值是
CASE_LOWER。本函数不改变数字索引。
如果一个数组中的多个键名经过本函数后变成一样的话（例如 "keY" 和 "kEY"），最后一个值将覆盖其它的值。
add a note
User Contributed Notes
cm at gameswelt dot de
10-Aug-2007 11:11
10-Aug-2007 11:11
cdblog at gmail dot com
20-May-2005 08:55
20-May-2005 08:55
<?php
/**
* @return array
* @author Cocol
* @desc change the key case , if found repeat keys, then convert to array
* for more detail please visit http://php.clickz.cn/array/array_change_key_case.html
*/
function array_change_key_case_secure($array = array(),$case = CASE_UPPER) {
$secure = array();
if ($case == CASE_UPPER) {
foreach ($array as $key=>$val) {
$key = strtoupper($key);
if (!array_key_exists($key,$secure)) {
$secure[$key][] = $val;
} else {
$secure[$key][] = $val;
}
}
} else if ($case == CASE_LOWER) {
foreach ($array as $key=>$val) {
$key = strtolower($key);
if (!array_key_exists($key,$secure)) {
$secure[$key][] = $val;
} else {
$secure[$key][] = $val;
}
}
}
foreach ($secure as $key=>$val) {
if (count($secure[$key]) == 1) {
$secure[$key] = $val[0];
}
}
return $secure;
}
$array = array(
'a' => "john",
'A' => "vary",
'c' => "cocol",
);
print_r($array);
$array = array_change_key_case_secure($array,CASE_UPPER);
print_r($array);
?>
output:
Array
(
[a] => john
[A] => vary
[c] => cocol
)
Array
(
[A] => Array
(
[0] => john
[1] => vary
)
[C] => cocol
)
aidan at php dot net
02-Jun-2004 03:06
02-Jun-2004 03:06
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