Verifying multiple emails from array - php

Question

I have a query that I am not too sure how I can make it work
I have a form where the end users can add multiple email fields using jquery and it places each text input into an array
I have created some code that verifies each array key and fills an array with a number for verification purposes
Here is the code for verifying the POST:
// Collect and verify attached email
if(isset($_POST["email"])){
// set var for collecting email and store as null
$emailfields ="";
// start verify loop
foreach($_POST["email"] as $key => $email)
{
// Filter var email to comfirm it is an email
$email = filter_var($email, FILTER_SANITIZE_EMAIL);
if (!filter_var($email, FILTER_VALIDATE_EMAIL) === false)
{
$emailcheckarray[] = 1;
} else {
$emailcheckarray[] = 0;
}
// Create a string for later
$emailfields .= $email .",";
}
// Verify Array contains value
if (!in_array('1', $emailcheckarray, true))
{
$emailverification = 1;
} else {
$emailverification = 0;
}
}
echo $emailfields;
echo $emailverification;
Now this works it fills the array $emailcheckarray with 1 1 1 1 1 if the emails are valid depending on how many inputs the user uses.
Is there a way that I can get the in_array to only work with all keys being the same as currently if one of the keys are 0 it still outputs $emailverification as 1 if the user enters 1 valid email and the rest invalid when I want it to be 0.

Answer 1

You can just omit the in_array if you set the verification to 0 during the loop when any of the checks fails. So start with a value of 1 as you have no failures yet:
$emailverification = 1; // added
// start verify loop
foreach($_POST["email"] as $key => $email)
{
// Filter var email to comfirm it is an email
$email = filter_var($email, FILTER_SANITIZE_EMAIL);
if (filter_var($email, FILTER_VALIDATE_EMAIL) !== false)
{
$emailcheckarray[] = 1;
} else {
$emailcheckarray[] = 0;
$emailverification = 0; // added
}
// Create a string for later
$emailfields .= $email .",";
}
... and then at the end of the loop you have the correct value.

Answer 2

You can use functions such as array_map and array_filter to get an array of all the valid emails.
if (isset($_POST['email'])) {
$sanitized_emails = array_map(function ($email) {
return filter_var($email, FILTER_SANITIZE_EMAIL);
}, $_POST['email']);
$valid_emails = array_filter($sanitized_emails, function($email) {
return filter_var($email, FILTER_VALIDATE_EMAIL);
});
$emailfields = implode(',', $sanitized_emails);
}
Then you just have to compare the size of the two tabs.
$emailverification = 0;
if (count($emails) == count($valid_emails)) {
$emailverification = 1;
}

Answer 3

Check the affirmative for zero:
if (in_array('0', $emailcheckarray, true)) {
$emailverification = 0;
} else {
$emailverification = 1;
}
If you don't have any zeros, that means they're all ones.