Why this doesn't work? if (array_search((string)$key,$list))
foreach ($head as $index => $key)
{
if (array_search((string)$key,$list))
{
$data[$index] = serialize($data[$index]);
$combined[$key] = isset($data[$index]) ? $data[$index] : null;
} else {
$combined[$key] = isset($data[$index]) ? $data[$index] : null;
}
}
$list is an array to search in
Info from php.net:
array_search — Searches the array for
a given value and returns the
corresponding key if successful
http://se.php.net/manual/en/function.array-search.php
try:
if($newKey = array_search((string)$key, $list))
By the way, you will get an notice on "$data", $data is not defined.
Br,
Paul Peelen
Related
I have a MYSQL query that fetches an array of dictionaries or results which are returned via JSON in an api. In some cases, I would like to change the name of the dictionary keys in the results array.
For example, in the following case:
$var = '[{"player":"Tiger Woods"},{"player":"Gary Player"}]';
I would like to change it to:
$var = '[{"golfer":"Tiger Woods"},{"golfer":"Gary Player"}]'
It is not practical in this case to change the mysql query so I'd just like to replace the word "player" with the word "golfer" for the keys without disturbing the values.
In the above example, I would not want to change Gary Player's name so just using str_replace does not seem like it would work.
Is there a way to change all of the keys from "player" to "golfer" without changing any of the values?
Here is the snippet you can use
$var = '[{"player":"Tiger Woods"},{"player":"Gary Player"}]';
// json decode the json string
$temp = json_decode($var, true);
$temp = array_map(function($item){
// combining key and values
return array_combine(['golfer'], $item);
}, $temp);
print_r($temp);
// or echo json_encode($temp);
Demo.
Some argue that foreach is fastest,
foreach($temp as $k => &$v){
$v = array_combine(['golfer'], $v);
}
print_r($temp);
Demo.
Little hardcoded if more than one keys in single array,
foreach ($temp as $k => &$v){
$v['golfer'] = $v['player'];
unset($v['player']);
}
print_r($temp);
Demo.
Using recursion
function custom($arr, $newKey, $oldKey)
{
// if the value is not an array, then you have reached the deepest
// point of the branch, so return the value
if (!is_array($arr)) {
return $arr;
}
$result = []; // empty array to hold copy of subject
foreach ($arr as $key => $value) {
// replace the key with the new key only if it is the old key
$key = ($key === $oldKey) ? $newKey : $key;
// add the value with the recursive call
$result[$key] = custom($value, $newKey, $oldKey);
}
return $result;
}
$var = '[{"player":"Tiger Woods"},{"player":"Gary Player"}]';
$temp = json_decode($var, true);
$temp = replaceKey($temp, 'golfer', 'player');
print_r($temp);
Demo & source.
Using json way,
function json_change_key($arr, $oldkey, $newkey) {
$json = str_replace('"'.$oldkey.'":', '"'.$newkey.'":', json_encode($arr));
return json_decode($json, true);
}
$temp = json_change_key($temp, 'player', 'golfer');
print_r($temp);
Demo
If you want multiple key replace, here is the trick,
$var = '[{"player":"Tiger Woods", "wins":"10","losses":"3"},{"player":"Gary Player","wins":"7", "losses":6}]';
$temp = json_decode($var, true);
function recursive_change_key($arr, $set)
{
if (is_array($arr) && is_array($set)) {
$newArr = [];
foreach ($arr as $k => $v) {
$key = array_key_exists($k, $set) ? $set[$k] : $k;
$newArr[$key] = is_array($v) ? recursive_change_key($v, $set) : $v;
}
return $newArr;
}
return $arr;
}
$set = [
"player" => "golfers",
"wins" => "victories",
"losses" => "defeats"
];
$temp = recursive_change_key($temp, $set);
print_r($temp);
Demo.
$a = '[{"player":"Tiger Woods"},{"player":"Gary Player"}]';
$array = json_decode($a, true);
foreach($array as $key=>$value){
if(array_keys($value)[0] === "player"){
$array[$key] = ["golfer" => array_values($value)[0]];
};
}
echo json_encode($array);
you can write the value of the key to a new key and then delete the old.
renaming a key called "a" to "b", while keeping the value.
var json = {
"a" : "one"
}
json["b"] = json["a"];
delete json["a"];
for your example, just use this with a loop.
source: https://sciter.com/forums/topic/how-to-rename-the-key-of-json/
I have q question: what is the easiest way to create multi-dimensional array in php dynamically?
Here a static version:
$tab['k1']['k2']['k3'] = 'value';
I would like to avoid eval()
I'm not successful with variable variable ($$)
so I'm trying to develop a function fun with such interface:
$tab = fun( $tab, array( 'k1', 'k2', 'k3' ), 'value' );
Do you have a solution? What is the simplest way?
regards,
Annie
There are a number of ways to achieve this, but here is one which uses PHP's ability to have N arguments passed to a function. This gives you the flexibility of creating an array with a depth of 3, or 2, or 7 or whatever.
// pass $value as first param -- params 2 - N define the multi array
function MakeMultiArray()
{
$args = func_get_args();
$output = array();
if (count($args) == 1)
$output[] = $args[0]; // just the value
else if (count($args) > 1)
{
$output = $args[0];
// loop the args from the end to the front to make the array
for ($i = count($args)-1; $i >= 1; $i--)
{
$output = array($args[$i] => $output);
}
}
return $output;
}
Here's how it would work:
$array = MakeMultiArray('value', 'k1', 'k2', 'k3');
And will produce this:
Array
(
[k1] => Array
(
[k2] => Array
(
[k3] => value
)
)
)
Following function will work for any number of keys.
function fun($keys, $value) {
// If not keys array found then return false
if (empty($keys)) return false;
// If only one key then
if (count($keys) == 1) {
$result[$keys[0]] = $value;
return $result;
}
// prepare initial array with first key
$result[array_shift($keys)] = '';
// now $keys = ['key2', 'key3']
// get last key of array
$last_key = end($keys);
foreach($keys as $key) {
$val = $key == $last_key ? $value : '';
array_walk_recursive($result, function(&$item, $k) use ($key, $val) {
$item[$key] = $val;
});
}
return $result;
}
This should work if $tab always has 3 indices:
function func(&$name, $indices, $value)
{
$name[$indices[0]][$indices[1]][$indices[2]] = $value;
};
func($tab, array( 'k1', 'k2', 'k3' ), 'value' );
I need compare 2 arrays , the first array have one order and can´t change , in the other array i have different values , the first array must compare his id with the id of the other array , and if the id it´s the same , take the value and replace for show all in the same order
For Example :
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
The Result in this case i want get it´s this :
"1a-dogs","2a-cats","3a-birds","4a-walking"
If the id in this case 4a it´s the same , that entry must be modificate and put the value of other array and stay all in the same order
I do this but no get work me :
for($fte=0;$fte<count($array_1);$fte++)
{
$exp_id_tmp=explode("-",$array_1[$fte]);
$cr_temp[]="".$exp_id_tmp[0]."";
}
for($ftt=0;$ftt<count($array_2);$ftt++)
{
$exp_id_targ=explode("-",$array_2[$ftt]);
$cr_target[]="".$exp_id_targ[0]."";
}
/// Here I tried use array_diff and others but no can get the results as i want
How i can do this for get this results ?
Maybe you could use the array_udiff_assoc() function with a callback
Here you go. It's not the cleanest code I've ever written.
Runnable example: http://3v4l.org/kUC3r
<?php
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
function getKeyStartingWith($array, $startVal){
foreach($array as $key => $val){
if(strpos($val, $startVal) === 0){
return $key;
}
}
return false;
}
function getMergedArray($array_1, $array_2){
$array_3 = array();
foreach($array_1 as $key => $val){
$startVal = substr($val, 0, 2);
$array_2_key = getKeyStartingWith($array_2, $startVal);
if($array_2_key !== false){
$array_3[$key] = $array_2[$array_2_key];
} else {
$array_3[$key] = $val;
}
}
return $array_3;
}
$array_1 = getMergedArray($array_1, $array_2);
print_r($array_1);
First split the 2 arrays into proper key and value pairs (key = 1a and value = dogs). Then try looping through the first array and for each of its keys check to see if it exists in the second array. If it does, replace the value from the second array in the first. And at the end your first array will contain the result you want.
Like so:
$array_1 = array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2 = array("4a-walking","2a-cats");
function splitArray ($arrayInput)
{
$arrayOutput = array();
foreach ($arrayInput as $element) {
$tempArray = explode('-', $element);
$arrayOutput[$tempArray[0]] = $tempArray[1];
}
return $arrayOutput;
}
$arraySplit1 = splitArray($array_1);
$arraySplit2 = splitArray($array_2);
foreach ($arraySplit1 as $key1 => $value1) {
if (array_key_exists($key1, $arraySplit2)) {
$arraySplit1[$key1] = $arraySplit2[$key1];
}
}
print_r($arraySplit1);
See it working here:
http://3v4l.org/2BrVI
$array_1=array("1a-dogs","2a-cats","3a-birds","4a-people");
$array_2=array("4a-walking","2a-cats");
function merge_array($arr1, $arr2) {
$arr_tmp1 = array();
foreach($arr1 as $val) {
list($key, $val) = explode('-', $val);
$arr_tmp1[$key] = $val;
}
foreach($arr2 as $val) {
list($key, $val) = explode('-', $val);
if(array_key_exists($key, $arr_tmp1))
$arr_tmp1[$key] = $val;
}
return $arr_tmp1;
}
$result = merge_array($array_1, $array_2);
echo '<pre>';
print_r($result);
echo '</pre>';
This short code works properly, you'll get this result:
Array
(
[1a] => dogs
[2a] => cats
[3a] => birds
[4a] => walking
)
I have a multi-dimension array like:
$fields =
Array (
[1] => Array
(
[field_special_features5_value] => Special Function 5
)
[2] => Array
(
[field_special_features6_value] => Special Function 6
)
[3] => Array
(
[field_opticalzoom_value] => Optical Zoom
)
)
I want to get the value by key, I tried the code below but not work
$tmp = array_search('field_special_features5_value' , $fields);
echo $tmp;
How can I get the value Special Function 5 of the key field_special_features5_value?
Thanks
print $fields[1]['field_special_features5_value'];
or if you don't know at which index your array is, something like this:
function GetKey($key, $search)
{
foreach ($search as $array)
{
if (array_key_exists($key, $array))
{
return $array[$key];
}
}
return false;
}
$tmp = GetKey('field_special_features5_value' , $fields);
echo $tmp;
If you know where it is located in the $fields array, try :
$value = $fields[1]['field_special_features5_value'];
If not, try :
function getSubkey($key,$inArray)
{
for ($fields as $field)
{
$keys = array_keys($field);
if (isset($keys[$key])) return $keys[$key];
}
return NULL;
}
And use it like this :
<?php
$value = getSubkey("field_special_features5_value",$fields);
?>
You need to search recursive:
function array_search_recursive(array $array, $key) {
foreach ($array as $k => $v) {
if (is_array($v)) {
if($found = array_search_recursive($v, $key)){
return $found;
}
} elseif ($k == $key) {
return $v;
} else {
return false;
}
}
}
$result = array_search_recursive($fields, 'field_special_features5_value');
Your problem is that you have a top-level index first before you can search you array. So to access that value you need to do this:
$tmp = $fields[1]['field_special_features5_value'];
You can do it with recursive function like this
<?php
function multi_array_key_exists($needle, $haystack) {
foreach ($haystack as $key=>$value) {
if ($needle===$key) {
return $key;
}
if (is_array($value)) {
if(multi_array_key_exists($needle, $value)) {
return multi_array_key_exists($needle, $value);
}
}
}
return false;
}
?>
I need to get one time occurence on my array, with my code I get only first result here is my example code:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
for ($i=0; $i<count($arr); $i++)
{
if($arrs[$arr[$i]]==1)
{
//do something...in this example i expect to receive b c and d
}
}
Thanks in advance
ciao h
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
for ($i=0; $i<count($arr); $i++)
{
if($arrs[$arr[$i]]==1)
{
echo $arr[$i];
}
}
That should display bcd
$arr=array("a","a","b","c","d");
$result = array();
$doubles = array();
while( !empty( $arr ) ) {
$value = array_pop( $arr );
if( !in_array( $value, $arr )
&& !in_array( $value, $doubles ) ) {
$result[] = $value;
}
else {
$doubles[] = $value;
}
}
May be you've miss your real results:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
/*
now $arrs is:
array (
'a' => 2,
'b' => 1,
'c' => 1,
'd' => 1,
)
*/
foreach($arrs as $id => $count){
if($count==1) {
// do your code
}
}
/*******************************************************/
/* usefull version */
/*******************************************************/
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
foreach($arr as $id ){
if($arrs[$id]==1){
// do your code
echo "$id is single\n";
}
}
You just need to retrieve any value which only occurs once in the array, right? Try this:
$arr=array("a","a","b","c","d");
$arrs=array_count_values($arr);
foreach ($arrs as $uniqueValue => $count)
{
if($value == 1) {
echo $uniqueValue;
}
}
array_count_values returns an associative array where the key is the value found and its value is the number of times it occurs in the original array. This loop simply iterates over each unique value found in your array (i.e. the keys from array_count_values) and checks if it was only found once (i.e. that key has a value of 1). If it does, it echos out the value. Of course, you probably want to do something a bit more complex with the value, but this works as a placeholder.
$count = 0;
foreach(array("a","a","b","c","d") as $v){
if($v == 1){$count++;}
}