Check if an array is in the key of another array in PHP

I've an array like $ignore_post = array("foo", "开发者_开发技巧bar"); and I need to check if foo or bar is a key for $_POST (if $_POST["foo"] or $_POST["bar"] exists).

How I can do that?

Thank you in advance

You can use PHP function array_key_exists:

<?php
foreach($ignore_post as $key)
{
    if(array_key_exists($key,$_POST))
    {
        // ...
    }
}
?>

Alternatively you can replace array_key_exists($key,$_POST) with isset($_POST[$key])

Please try using array_key_exists php function.

For reference, visit array_key_exists

You can do it like this

<?php foreach ($ignore_post as $value){
if(!empty($_POST[$value])){
   echo 'It exists';
} else {
   echo 'It does not exist or is empty'
}
}?>

<?php foreach ($ignore_post as $value){
if(isset($_POST[$value])){
   echo 'It exists but might be empty';
} else {
   echo 'It does not exist'
}
}?>