PHP - How can I create a recursive function? - php

Question

My array:
array(1) {
["farm"] => array(1) {
["animals"] => array(1) {
[horses] => array(4) {
["fred"] => string(4) "fred"
["sam"] => string(4) "sam"
["alan"] => string(4) "alan"
["john"] => string(4) "john"
}
}
}
}
My function (created by #FrayneKonok)
$id = "2";
$search = "horses";
get_values($arr);
function get_values($arr, $id) {
global $search;
foreach($arr as $key => $value) {
if($key == $search) {
if(is_array($value)) {
echo(join("<a href='mypage.php?id=".$id."&dir=".$value."'><li>",array_keys($value)));
echo("</li></a>");
} else {
echo($value);
}
} else {
get_values($value);
}
}
}
get_values($array,$id);
The result is:
"fred"
<li>sam</li>
<li>alan</li>
<li>john</li>
The result I'm looking for:
<li>fred</li>
<li>sam</li>
<li>alan</li>
<li>john</li>
Another example is when i use if($search = "farm") my result becomes:
"animals"
When the result I'm looking for is:
<li>animals</li>

Answer 1

Online link
Array and input, function call
$arr = array("farm" =>
array("animals"=>
array("horses" =>
array("fred" => "fred",
"sam" => "sam",
"alan" => "alan",
"john" => "john")
)
)
);
$search = 'farm';
get_values($arr);
Function:
function get_values($arr){
global $search;
foreach($arr as $key => $value){
if($key == $search){
if(is_array($value)){
$keys = array_keys($value);
if(count($keys) > 1){
for($i = 0; $i < count($keys); $i++){
echo '<li>'.$keys[$i].'</li>';
}
}else{
echo '<li>'.$keys[0].'</li>';
}
}
else{
echo $value;
}
}else{
get_values($value);
}
}
}
Output
<li>animals</li>
Also tested for the horses.

Answer 2

I suggest using another foreach
Instead of
if(is_array($value)){
echo join("<a href='mypage.php?id=".$id."&dir=".$value."'><li>",array_keys($value));
echo "</li></a>";
}
Use
if(is_array($value)){
foreach( $value as $k => $v ) {
echo "<a href='mypage.php?id=".$id."&dir=".$k."'><li>".$k."</li></a>\n";
}
}
Also don't forget to pass $id each time
The whole thing becomes:
$arr = array( "farm"=> array( "animals"=> array( "horses"=> array( "fred" => "fred", "sam" => "sam", "alan" => "alan", "john" => "john" ) ) ) );
$id = "2";
$search = "horses";
get_values($arr, $id); // <-- pass $id here
function get_values($arr, $id){
global $search;
foreach($arr as $key => $value){
if($key == $search){
if(is_array($value)){
foreach( $value as $k => $v ) {
echo "<a href='mypage.php?id=".$id."&dir=".$k."'><li>".$k."</li></a>\n";
}
}
else{
echo $value;
}
}else{
get_values($value, $id ); // <-- pass $id here to
}
}
}