first loop through everything, than if 1 is true do something - php

Question

So I have this foreach loop that checks if $testsubject is equal to the results from the array.
But I want it to check all the results first and if one is true than go further and check the date and else just echo that the voucher is not corect.
the purpose of the code is that the user puts in a voucher code which for now is $testsubject than I check if the voucher exists in the system if that is true I check if it is not expired with the date function and then I cut the discount for the price $testamount.
image of the echo's https://imagebin.ca/v/3xQuiAClVsAG
index.php
function display()
{
$arrContextOptions = [
"ssl" => [
"verify_peer" => false,
"verify_peer_name" => false,
],
];
$getVoucherList = "https://www.planyo.com/rest/?method=list_vouchers&api_key=yourkey&resource_id=110556";
$cleanVoucherList = preg_replace("/ /", "%20", $getVoucherList);
$voucherlist = file_get_contents("$cleanVoucherList", false, stream_context_create($arrContextOptions));
$voucherList = json_decode($voucherlist, true);
$testsubject = "TESTVOUCHER";
$testamount = "5,00";
foreach ($voucherList['data']['results'] as $testVoucher => $testVoucherArr) {
if ($testsubject == $testVoucherArr['code']) {
echo $testsubject . " is not equal to " . $testVoucherArr['code'] . "<br>";
echo $testVoucherArr['rental_end_date'] . "<br>";
echo $testVoucherArr['discount_value'] . "<br>";
if (date("Y-m-d") <= $testVoucherArr['rental_end_date']) {
echo "this code can be used <br>";
echo $testamount - $testVoucherArr['discount_value'] . "<br>";
} else {
echo "this code cannot be used";
}
;
} else {
echo $testsubject . " is not equal to " .
$testVoucherArr['code'] . "<br>";
}
}
}
if (isset($_POST['submit'])) {
display();
}

Answer 1

Would this work for you? If the code is valid, then you enter a function which checks the date. After the function has ended, the foreach loop will end by using "break;"
function testVoucherDate($voucher)
{
if (date("Y-m-d") <= $testVoucherArr['rental_end_date']) {
echo "this code can be used <br>";
echo $testamount - $testVoucherArr['discount_value'] . "<br>";
} else {
echo "this code cannot be used";
};
}
foreach ($voucherList['data']['results'] as $testVoucher => $testVoucherArr) {
if ($testsubject == $testVoucherArr['code']) {
echo $testsubject . " is not equal to " . $testVoucherArr['code'] . "<br>";
echo $testVoucherArr['rental_end_date'] . "<br>";
echo $testVoucherArr['discount_value'] . "<br>";
testVoucherDate($testVoucherArr);
break;
} else {
echo $testsubject . " is not equal to " .
$testVoucherArr['code'] . "<br>";
}
}
EDIT: I've put the function above the loop, so no errors of undefined functions will occur

Answer 2

First set a flag to true, then loop setting the flag to false if there is an error. Then test the flag:
$flag = true; // SET A FLAG
foreach($a as $b){
if($b !== 'Hello')$flag = false; // IF contidtion not met, set flag to true
}
if($flag === false){ // TEST IF flag result
echo 'Dear oh dear';die;
}
foreach(....){ // GO ON if flag === true
....
}