Key exist in complexe array - php

Question

I would like to test if the key of an associative array exist in my $_POST.
my $_POST is like that:
$_POST["balle"]["x"] = 5;
$_POST["balle"]["y"] = 5;
$_POST["balle"]["z"] = 5;
or like that by example:
$_POST["p1"][1]["vit"] = 7;
$_POST["p1"][1]["angle"] = 32;
$_POST["p2"][2]["vit"] = 17;
$_POST["p2"][2]["angle"] = 2;
the values don't matter but I must check how are my $_POST keys.
I don't understand how i can test recursivly that because the $_POST can change and have differents forms.
I have try this:
function Check_post($new, $arr)
{
echo "Init<br/>";
$res = true;
if (is_array($new))
{
foreach ($new as $key => $value)
{
if (!in_array($key, $arr))
{
echo "Fail $key";
print_r($arr);
return (false);
}
$res = $res & Check_post($new[$key], $arr[$key]);
}
}
else
$res = in_array($new, $arr);
echo "MY RESULT";
var_dump($res);
return ($res);
}
$b = array();
$b["balle"] = array("x", "y", "z");
$post = array();
$post["balle"] = array();
$post["balle"]["x"] = 50;
$post["balle"]["y"] = 50;
$post["balle"]["z"] = 50;
echo "<pre>";
print_r($b);
echo "</pre><pre>";
print_r($post);
echo "</pre>";
Check_post($b, $post);
but i got "Fail balle". my $post variable is to simulate the real $_POST and for make it easier to test.
EDIT:
The function should work like that:
1) test if "balle" exist in $post
2) "balle" exist so recursive call
3) test if "x" exist in $post["balle"](recursive)
4) test if "y" exist in $post["balle"](recursive)
5) test if "z" exist in $post["balle"](recursive)
6) all existe so $res = true

Answer 1

EDIT:
I finaly editet the whole function:
function Check_post($needle, $haystack)
{
if(is_array($needle)){
foreach ($needle as $key => $element){
$result = true;
if($result = (array_key_exists($key, $haystack) || array_key_exists($element, $haystack))){
$key = (isset($haystack[$key]) ? $key : $element);
if(is_array($haystack[$key]))
$result = Check_post($element, $haystack[$key]);
}
if(!$result){
return false;
}
}
return $result;
}else {
return array_key_exists($needle, $haystack);
}
}
Now it should work as you want it
Example:
$_POST["balle"]["x"] = 5;
$_POST["balle"]["y"] = 5;
$_POST["balle"]["z"] = 5;
$b = array();
$b["balle"] = array("x", "y", "z");
var_dump(Check_post($b, $_POST)); //returns true
$b["balle"] = array("x", "y", "z", "b");
var_dump(Check_post($b, $_POST)); //returns false

Answer 2

The in_array function you're using checks if $key is contained in $arr as a value. If I got you right, you want to check if there is the same key in $arr instead. Use array_key_exists($key, $arr) for this.

Answer 3

Try this
$_POST["p1"][1]["vit"] = 7;
$_POST["p1"][1]["angle"] = 32;
$_POST["p2"][2]["vit"] = 17;
$_POST["p2"][2]["angle"] = 2;
$needle = "2";
$samp = Check_post($_POST,$needle);
echo $samp;
function Check_post($array,$needle)
{
if(is_array($array))
{
foreach($array as $key=>$value)
{
if($key == $needle)
{
echo $key." key exists ";
}
else
{
if(is_array($value))
{
check_post($value,$needle);
}
}
}
}
}
Demo