array_key_exsists not working as expected PHP

Question

Hi i am using array_key_exists in php , here is my code

$action_array = array(
    'add_post_ajax'=>'posts'
);


if ($_SERVER['REQUEST_METHOD'] === 'POST') 
{ 
     echo $_POST['action'];
    if(array_key_exists($_POST['action'],$action_array))
    {
        $class = $action_array[$_POST['action']];
    }
    else 
    {
        echo "wrong data";
    }
}

echo $_POST['action']; display add_post_ajax , then it prints wrong data

strange , please help me , am i doing anything wrong here

UPDATE

I also tried to trim

if(array_key_exists(trim($_POST['action']),$action_array))

still the same result :/

here is my ajax request

xmlhttp.send("action='add_post_ajax' &name=" + name + "&email=" + email + "&post=" + post);

echo $_POST['action'] gives me add_post_ajax but var_dump($_POST['action']) gives me a wired result

<pre class='xdebug-var-dump' dir='ltr'><small>string</small> <font color='#cc0000'>'&#39;add_post_ajax&#39; '</font> <i>(length=16)</i>
</pre>

What is it :o

Another way to do this is `if(isset($action_array[$_POST['action']]))` — John Conde, Dec 13 '14 at 18:45
Works fine for me! Are you sure it return's `add_post_ajax` ? — Rizier123, Dec 13 '14 at 18:46
yes , i am sure . @JohnConde , i tried your one still the same — Kanishka Panamaldeniya, Dec 13 '14 at 18:47
Does this works for you? `$action_array = array( 'add_post_ajax'=>'posts' ); $_POST['action'] = "add_post_ajax"; if(array_key_exists($_POST['action'],$action_array)) echo "YES";` — Rizier123, Dec 13 '14 at 18:48
here is my ajax request xmlhttp.send("action='add_post_ajax' &name=" + name + "&email=" + email + "&post=" + post); — Kanishka Panamaldeniya, Dec 13 '14 at 18:50
what does `var_dump($_POST['action'])` or even `array_keys($_POST['action'])` tell you? — Mark Fox, Dec 13 '14 at 18:52
You have the [xdebug extension turned on](http://www.sitepoint.com/debugging-and-profiling-php-with-xdebug/), which adds some html to the output of `var_dump` — more importantly you are not looking for an array key, you are looking for an array value: use [in_array()](http://php.net/manual/en/function.in-array.php) instead of `array_key_exists()` — Mark Fox, Dec 13 '14 at 19:01
@MarkFox i need to use array_key_exists here is my planned function echo "came"; $class = $action_array[$_POST['action']]; echo $class; require $class.".php"; $obj = new $class(); $obj->$_POST['action'](); — Kanishka Panamaldeniya, Dec 13 '14 at 19:06
check posted data in chrome or firefox network tab! once i have a same problem i think it solved by restarting webserver! — Pouya Darabi, Dec 13 '14 at 19:17
I'm sorry, I see you are trying to map an a named action to a class value. What's strange is I have no problem running your code, I get the expected result. I'm using PHP's built in webserver, and cURL on the command line — what is your setup? — Mark Fox, Dec 13 '14 at 22:31

score 4 · Accepted Answer · edited Dec 15 '14 at 01:21

4

Your problem is single quotes.

Your $_POST['action'] uses 'add_post_ajax' but you're checking for add_post_ajax

When you send this:

xmlhttp.send("action='add_post_ajax' ...

you receive this:

 &#39;add_post_ajax&#39; (length=16)

add_post_ajax is 14 characters long, the extra two characters are '; it's the html character for a single quote.

edited Dec 15 '14 at 01:21

Mark Fox

8,694
9
53
75

answered Dec 13 '14 at 19:25

Konstantin

3,294
21
23

array_key_exsists not working as expected PHP

1 Answers1