Check whether an array is empty [duplicate]

Answer 1

I can't replicate that (php 5.3.6):

php > $error = array();
php > $error['something'] = false;
php > $error['somethingelse'] = false;
php > var_dump(empty($error));
bool(false)

php > $error = array();
php > var_dump(empty($error));
bool(true)
php >

exactly where are you doing the empty() call that returns true?

Answer 2

hi array is one object so it null type or blank

   <?php
        if($error!=null)
            echo "array is blank or null or not array";
    //OR
       if(!empty($error))
           echo "array is blank or null or not array";
    //OR
     if(is_array($error))
           echo "array is blank or null or not array";
   ?>

Answer 3

array with zero elements converts to false

http://php.net/manual/en/language.types.boolean.php

Answer 4

PHP's built-in empty() function checks to see whether the variable is empty, null, false, or a representation of zero. It doesn't return true just because the value associated with an array entry is false, in this case the array has actual elements in it and that's all that's evaluated.

If you'd like to check whether a particular error condition is set to true in an associative array, you can use the array_keys() function to filter the keys that have their value set to true.

$set_errors = array_keys( $errors, true );

You can then use the empty() function to check whether this array is empty, simultaneously telling you whether there are errors and also which errors have occurred.

Answer 5

function empty() does not work for testing empty arrays! example:

$a=array("","");
if(empty($a)) echo "empty";
else echo "not empty"; //this case is true

a function is necessary:

function is_array_empty($a){
foreach($a as $elm)
if(!empty($elm)) return false;
return true;
}

ok, this is a very old question :) , but i found this thread searching for a solution and i didnt find a good one.

bye (sorry for my english)

Answer 6

However, empty($error) still returns true, even though nothing is set.

That's not how empty() works. According to the manual, it will return true on an empty array only. Anything else wouldn't make sense.