我有一个多维数组,字符串作为键。我想在这些键上执行一个函数(操作字符串),然后写入一个新数组(即保持原始数组不变)。
示例:
$oldArr = array( "foo_old" => array("moo_old" => 1234, "woo_old" => 5678); "bar_old" => array("car_old" => 4321, "tar_old" => 8765); );
变为:
$newArr = array( "foo_new" => array("moo_new" => 1234, "woo_new" => 5678); "bar_new" => array("car_new" => 4321, "tar_new" => 8765); );
这只是一个例子,实际的数组有更多的级别/维度。哦,我的功能不会将“_old”替换为“_new”,再次只是一个例子。
我希望我有所帮助,先谢谢!
答案 0 :(得分:1)
编辑:我添加了一个用于打印已更改数组的函数。您可以在网站上包含代码,它会显示结果。新编辑的代码:
// array initialisation
oldArr = array();
$subArr1 = array();
$subArr2 = array();
$subArr1["moo_old"]=1234;
$subArr1["woo_old"]=5678;
$subArr2["car_old"]=4321;
$subArr2["tar_old"]=8765;
$oldArr["foo_old"]=$subArr1;
$oldArr["bar_old"]=$subArr2;
$oldArr; // make a copy of the array
// function which replaces recursivly the keys of the array
function renameArrayKeys( $oldArr ) {
$copyArr = $oldArr;
if( is_array( $oldArr) && count( $oldArr ) ) {
foreach ( $oldArr as $k => $v ) {
unset($copyArr[$k]); // removes old entries
$newKey = str_replace( '_old', '_new', $k );
if( is_array( $v ) ) {
$copyArr[ $newKey ] = renameArrayKeys( $v );
}
else {
$copyArr[ $newKey ] = $v;
}
}
return $copyArr;
}
}
// prints out the keys and values of the changed array
function printout($arr ){
foreach ($arr as $k => $val ) {
echo $k."=>".$val." | ";
if( is_array( $val ) ) {
printout( $val );
}
}
}
// calls the above functions
$changedArr = renameArrayKeys($oldArr);
printout($changedArr);
答案 1 :(得分:1)
我可能会稍晚一些,但递归是前进的方法!
$replace_from = "_old"; //can also be array i.e. array("foo_old", "bar_old")
$replace_to = "_new"; //can also be an array i.e. array("foo_new", "bar_new")
$oldArr = array(
"foo_old" => array("moo_old" => 1234, "woo_old" => 5678),
"bar_old" => array("car_old" => 4321, "tar_old" => 8765),
);
function replace($arr){
global $replace_from, $replace_to;
$newArr = array();
foreach($arr as $key => $value){
$newArr[str_replace($replace_from,$replace_to,$key)] = (is_array($value)) ? replace($value) : $value;
}
return $newArr;
}
print_r (replace($oldArr));
答案 2 :(得分:0)
这样的事情:
function renameKeys( $arr )
{
if( is_array( $arr ) && count( $arr ) ) {
foreach ( $arr as $k => $v ) {
$nk = str_replace( '_old', '_new', $k );
if( is_array( $v ) ) {
$v = renameKeys( $v );
}
$arr[ $nk ] = $v;
unset( $arr[$k] );
}
}
return $arr;
}
$oldArr = array(
"foo_old" => array("moo_old" => 1234, "woo_old" => 5678) ,
"bar_old" => array("car_old" => 4321, "tar_old" => 8765)
);
$nArr = renameKeys( $oldArr );
print_r( $nArr );
答案 3 :(得分:0)
关闭版本。这不会搞乱命名空间。
<?php
$from = '_old';
$to = '_new';
$old_arr = array(
'foo_old' => array('moo_old' => 1234, 'woo_old' => 5678),
'bar_old' => array('car_old' => 4321, 'tar_old' => 8765),
);
$func = function ($arr) use (&$func, $from, $to) {
$new_arr = array();
foreach($arr as $k => $v){
$new_arr[str_replace($from, $to, $k)] = is_array($v) ? $func($v) : $v;
}
return $new_arr;
};
print_r($func($old_arr));