CSV file to array with entry validation in PHP - php

Question

I tried to convert an csv file to an array with str_getcsv in php. Afterwards I want to check if the form submit is in the csv file alreaddy.
My code:
//get form input
$email = $_POST["email"];
//create array
$csv = array('str_getcsv', file('file.csv'));
//functio to check csv content for $email
function val() {
if (in_array($email, $csv)) {
echo "Enthalten";
}
else {
echo "Nicht enthalten";
}
}
The check is working now. But the code inside of the else {} statement ist not.
<?php
$email = $_POST["email"];
$csv = array_map('str_getcsv', file('file.csv'));
foreach ($csv as $row) {
if (in_array($email, $row)) {
echo "Error";
} else {
// this code is working fine if seperated
$list = array (array($email),);
$fp = fopen('file.csv', 'a');
foreach ($list as $fields) {
fputcsv($fp, $fields);
}
fclose($fp);
// here is a working skript to send an email to the $email recipient
}
}
?>

Answer 1

array_map('str_getcsv', file('file.csv')) will return a multi-dimensional array. in_array() isn't going to work like this.
You'll need to iterate over each row in the CSV to look for the email.
//get form input
$email = $_POST["email"];
//create array
$csv = array_map('str_getcsv', file('file.csv'));
foreach ($csv as $row) {
if (in_array($email, $row)) {
echo "Enthalten";
} else {
echo "Nicht enthalten";
}
}

Answer 2

first convert your csv file into array.
$csv = array_map('str_getcsv', file('file.csv'));
secondly, use array_search for the email inside the array above. (e.g: http://php.net/manual/en/function.array-search.php)
$key = array_search($email, $csv);
if email exist, it will return you the key inside the array.