How do I check if array value is empty? - php

Question

Here is my array ouput
Array
(
[1] => 1
[2] => 2
[3] =>
)
How do I know the [3] => is empty?
foreach ($array as $key => $value) {
if (empty($value))
echo "$key empty <br/>";
else
echo "$key not empty <br/>";
}
My out put showing all is not empty. What is correct way to check is empty?

Answer 1

An other solution:
$array = array('one', 'two', '');
if(count(array_filter($array)) == count($array)) {
echo 'OK';
} else {
echo 'ERROR';
}
http://codepad.org/zF9KkqKl

Answer 2

It works as expected, third one is empty
http://codepad.org/yBIVBHj0
Maybe try to trim its value, just in case that third value would be just a space.
foreach ($array as $key => $value) {
$value = trim($value);
if (empty($value))
echo "$key empty <br/>";
else
echo "$key not empty <br/>";
}

Answer 3

You can check for an empty array by using the following:
if ( !empty(array_filter($array))) {
echo 'OK';
} else {
echo 'EMPTY ARRAY';
}

Answer 4

You can use array_diff() and array_diff_key():
$array = array('one', 'two', '');
$emptyKeys = array_diff_key(array_diff($array,array()),$array);
array_diff() extracts all items which are not the same (therefore leaving out the blanks), array_diff_key gives back the differences to the original array.

Answer 5

$array = array('A', 'B', '');
or
$array = array('A', 'B', ' ');
An other solution:
this work for me
if(in_array(null, $myArray) || in_array('', array_map('trim',$myArray))) {
echo 'Found a empty value in your array!';
}

Answer 6

Here is a simple solution to check an array for empty key values and return the key.
$a = array('string', '', 5);
echo array_search(null, $a);
// Echos 1
To check if array contains an empty key value. Try this.
$b = array('string','string','string','string','','string');
if (in_array(null, $b)) {
echo 'We found a empty key value in your array!';
}

Answer 7

im using in my project like this for check this array
im posting form data like this array('username' => 'john','surname' => 'sins');
public function checkArrayKeyExist($arr) {
foreach ($arr as $key => $value) {
if (!strlen($arr[$key])) {
return false;
}
}
return true;
}

Answer 8

Try this:
<?php
$data=array(
'title' => 'Test Name Four',
'first_name' => '',
'last_name' => 'M',
'field_company' => 'ABC',
'email' => '',
'client_phone_number' => '',
'address_line_1' => '',
'address_line_2' => 'Address 3',
'address_line_3' => '',
'address_line_4' => '',
'post_code' => '',
);
echo '<pre>';
print_r($data);
foreach ($data as $key => $case ) {
echo "$key => ".is_multiArrayEmpty($case)."<br>";
}
function is_multiArrayEmpty($multiarray) {
if(is_array($multiarray) and !empty($multiarray)){
$tmp = array_shift($multiarray);
if(!is_multiArrayEmpty($multiarray) or !is_multiArrayEmpty($tmp)){
return false;
}
return true;
}
if(empty($multiarray)){
return true;
}
return false;
}
?>