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?
Another solution:
$array = array('one', 'two', '');
if(count(array_filter($array)) == count($array)) {
echo 'OK';
} else {
echo 'ERROR';
}
Also,
$containsEmpty = in_array("", $arr);
Should be a bit faster as it doesn't have to trace the entire array and doesn't have to create a new array.
Note that both solutions will consider 0, false, null and empty array as empty values as well.
In case you also consider a value empty if it consists of space-like characters only, see the answer below
!strlen() should be used, then a break or return or exit (depending on context) to avoid doing unnecessary iterations.It works as expected, third one is empty
Maybe try to trim its value, just in case that third value would be just a space.
foreach ($array as $key => $value) {
$value = trim($value);
if ($value === '')
echo "$key is empty <br/>";
else
echo "$key is not empty <br/>";
}
Or to make it a function
function arrayHasEmptyValue(array $array) {
foreach ($array as $value) {
if (trim($value) === '') {
return true;
}
}
return false;
}
$key doesn't need to be declared in the second snippet because it is never used.For a different task, when you need to tell if ALL array values are empty, you can use the following:
if (array_filter($array)) {
echo 'OK';
} else {
echo 'EMPTY ARRAY';
}
In case you also consider values empty if they contain only spaces, like below
$myArray = array('A', 'B', ' ');
here is the solution
if(in_array('', array_map('trim', $myArray), true)) {
echo 'Found empty value in your array!';
}
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.
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, $b)) {
echo 'We found a empty key value in your array!';
}
im using in my project like this for check this array
im posting form data like this array('username' => 'john','surname' => 'sins');
public function checkArrayKeyExist($arr) {
foreach ($arr as $key => $value) {
if (!strlen($arr[$key])) {
return false;
}
}
return true;
}
$arr[$key] is more simply expressed as $value. The $key declaration is not necessary since it is not returned. checkArrayKeyExist() is a very poor/misleading choice for a method name.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($multiarray)){
return true;
}
return false;
}
?>
' ', so it's not an empty string? If so, try change it inif (trim($value) != '')...