How to check for empty values with in_array WITH EXCEPTIONS? - php

Question

I am trying to figue out how to check for empty values of an array with certain exceptions. Here is the array:
[name_first] => Name
[name_last] =>
[email] => blah#blah.com
[address] =>
[country] => USA
There are two empty values - name_last & address. Here is the code:
if (in_array(null, $data)) {
echo 'empty values';
}else{
echo 'ok';
}
It will return false as [address] and [name_last] values are empty. How can I ignore a particular key (let's say - [address])? Basically it is supposed to LOOK like this:
if (in_array(null, $data) **&& key_is_not('address', 'hatever')**) {
echo 'empty values';
}else{
echo 'ok';
}

Answer 1

try this :
$data = array('name_first' => "Name",
'name_last' => "",
'email' => "blah#blah.com",
'address' => "",
'country' => "USA");
foreach ($data as $key => $value) {
if($value=="")
echo "$key is Empty\n";
}
Update
To exclude particular keys from the check, you can do this way :
$data = array('name_first' => "",
'name_last' => "",
'email' => "blah#blah.com",
'address' => "",
'country' => "");
$array = array("name_first","country");
foreach ($data as $key => $value) {
if($value=="" and (!in_array($key, $array)))
echo "$key is Empty\n";
}

Answer 2

$input_array = [
'name_first' => 'Name',
'name_last' => '',
'email' => 'blah#blah.com',
'address' => '',
'country' => 'USA',
];
Filter array ignoring the specific keys, here address and name_last
$ignore_search = in_array('', array_filter($input_array, function($k){
return !in_array($k, ['address', 'name_last']);
}, ARRAY_FILTER_USE_KEY));
Here array_filter will unset the keys specified inside.
Will return boolean depending on match found or not, if you want keys, just change in_array with array_search.

Answer 3

This will check to see if the value is set and the length is greater than 0, not an empty string.
foreach($elements as $key => $data)
{
if(!in_array($key, ['address', 'something']))
{
if(count($data) > 0)
{
//stuff
}
}
}

Answer 4

You can also ignore the key by writing a custom function that will handle the keys exception, this way you are more in control if in any case you want to tweak later:
if (in_array_except(null, $data, array("address"))) {
echo 'empty values';
}else{
echo 'ok';
}
The function will be:
function in_array_except($needle, $haystack, $exception = array(), $strict = false) {
if ($strict) {
foreach($haystack as $needle_field => $item) {
if (!in_array($needle_field, $exception) && $item === $needle)
return true;
}
} else {
foreach($haystack as $needle_field => $item) {
if (!in_array($needle_field, $exception) && $item == $needle)
return true;
}
}
return false;
}
With your current data set:
[name_first] => Name
[name_last] =>
[email] => blah#blah.com
[address] =>
[country] => USA
The output with the sample snippet is:
empty values

Answer 5

Try with array_search() like below::
if (array_search("", $arr)) {
echo 'empty values';
} else {
echo 'ok';
}
** Update **
$array_var = array("11" => 111, "22" => 222, "33" => 333, "44" => 444, "55" => "", "66" => 666);
$new_array_var = array();
foreach ($array_var as $key => $value) {
// echo $key . "==>" . $value . "<br/>";
if (isset($value) && $value != "") {
$new_array_var[$key] = $value;
}
}
echo "<pre>";
echo "OLD : <br/>";
print_r($array_var);
echo "<br/><br/>";
echo "NEW : <br/>";
print_r($new_array_var);
echo "</pre>";

Answer 6

$ignore_array = array("address");
$blank_value_keys = array_keys($data,"");
if(sizeof($blank_value_keys)>0 && sizeof(array_diff($ignore_array,$blank_value_keys)>0){
echo "Empty";
}else{
echo "NOT Empty";
}
Add all the keys to be ignored in ignore array list.
array_keys will return all the keys which have blank values.
Next we are checking if size of array returned by array_keys is greater than 0 and there are more keys in $blank_value_keys than $ignore_array than if loop executes.
Note: array_diff will return all the values available in second array but not in first