doubt in foreach -php - php

Question

i have this code. Basically identifies if any position of array is empty or have an input equal a zero.
$fields = array("first", "second", "third");
function check($fields, $form) {
foreach($fields as $field) {
if(empty($form[$field]) || $form[$field] === 0) {
echo 'empty';
return false;
break;
}
}
}
My doubt now, is , how i can do an echo for example to show the second position is empty?
with an if? if ($form[$field][second]) ? i don't know if this is correct, or exists a better option
thanks

Answer 1

if $field is what you want to echo then just prepend it to 'is empty':
$fields = array("first", "second", "third");
function check($fields, $form)
{
foreach($fields as $field)
{
if(empty($form[$field]))
{
echo $field.' is empty';
return false;
}
}
}
if you need the index value:
$fields = array("first", "second", "third");
function check($fields, $form)
{
foreach($fields as $k=>$field)
{
if(empty($form[$field]))
{
echo $k.' is empty';
return false;
}
}
}
eventually if the aim is retrieve the empty position (if check returns -1 then there are no empty positions):
$fields = array("first", "second", "third");
function check($fields, $form)
{
foreach($fields as $k=>$field)
{
if(empty($form[$field]))
return $k;
}
return -1;
}

Answer 2

Can't you do something like the following:
if (empty($form[$field+1])) {
echo 'Empty';
}

Answer 3

Use a recursive function like this:
function isEmpty($array){
if(is_array($array)){
foreach($array as $key=>$value){
if(isEmpty($value) !== false) return $key;
}
return false;
}else{
if($array === 0 || empty($array)){
return true;
}
}
}
This will traverse the array as deep as it goes, and return the index where it found an empty position, or false if it did not find an empty position.

Answer 4

Maybe I'm in totally wrongness, but why not :
if(empty($form[2]) || $form[2] === 0) {
echo 'second element is empty';
}
If your question is 'How can I know at what index am I while doing a foreach', then the answer is that :
$fields = array("first", "second", "third");
function check($fields, $form) {
foreach($fields as $i => $field) {
if ( (empty($form[$field]) || $form[$field] === 0) && ($i == 2)) {
echo '2n element is empty';
return false; // no need to break; as you have returned something.
}
}
}