在php中将数组转换为对象

In php I am converting posted data from a form to objects like this:

<?php

...some code...

    $post = new stdClass;

    foreach ($_POST as $key => $val)
        $post->$key = trim(strip_tags($_POST[$key]));

?>

Then in my page I just echo posted data like this :

<?php echo $post->Name; ?>
<?php echo $post->Address; ?>

etc...

This works fine but I have multiple checkboxes that are part of a group and I echo the results of that, like this:

<?php
  $colors = $_POST['color_type'];
  if(empty($colors))
  {
    echo("No color Type Selected.");
  }
  else
  {
    $N = count($colors);

     for($i=0; $i < $N; $i++)
    {
      echo($colors[$i] . ", ");
    }
  }
?>

That works when I am just using array, but how do I write this as object syntax?

why would you want that? What's wrong with an array?

Use Object Oriented Programming, which might be what you are looking for. Treat it as an object, by making a class called Color and doing $colors[$i] = new Color();

This way you can do whatever you want with it, and add functions to it.

using your code

function array_to_object($arr) {
    $post = new stdClass;
    foreach ($arr as $key => $val) {
        if(is_array($val)) {
            $post->$key = post_object($val);
        }else{
            $post->$key = trim(strip_tags($arr[$key]));
        }
    }
    return $post;
}

$post = array_to_object($_POST);

or more complex solution

function arrayToObject($array) {
    if(!is_array($array)) {
        return $array;
    }

    $object = new stdClass();
    if (is_array($array) && count($array) > 0) {
      foreach ($array as $name=>$value) {
         $name = strtolower(trim($name));
         if (!empty($name)) {
            $object->$name = arrayToObject($value);
         }
      }
      return $object;
    }
    else {
      return FALSE;
    }
}

from http://www.richardcastera.com/blog/php-convert-array-to-object-with-stdclass

Pretty simple -- when you attach the color_type key to your object, it'll become an array that's a property of your object. This is most likely what you want: you probably won't want to turn that array into its own stdClass-based object, because then you won't be able to iterate through all the values (as easily). Here's a snippet:

<?php
    // putting in both of these checks prevents you from throwing an E_WARNING
    // for a non-existent property. E_WARNINGs aren't dangerous, but it makes
    // your error messages cleaner when you don't have to wade through a bunch
    // of E_WARNINGS.
    if (!isset($post->color_type) || empty($post->color_type)) {
        echo 'No colour type selected.'; // apologies for the Canadian spelling!
    } else {
        // this loop does exactly the same thing as your loop, but it makes it a
        // bit more succinct -- you don't have to store the count of array values
        // in $N. Bit of syntax that speeds things up!
        foreach ($post->color_type as $thisColor) {
            echo $thisColor;
        }
    }
?>

Hope this helps! Of course, in a real-life setting, you'll want to do all sorts of data validation and cleaning -- for instance, you'll want to check that the browser actually passed an array of values for $_POST['color_type'], and you'll want to clean the output in case someone is trying to inject an exploit into your page (by going echo htmlspecialchars($thisColor); -- this turns all characters like < and > into HTML entities so they can't insert JavaScript code).