how to get value from text file in php - php

Question

I have script that make comparison between value from page php and data store in txt file, and then it will do some special code.
Content of txt file (account.txt)
F: user pass { expire=date; afexpire=date; email=email#gmail.com; Country=Germani; visit_from=none; ip=none; hosted=none }
F: mike fghg58g { expire=2016-05-24; afexpire=2015-5-24 17; email=mike#gmail.com; Country=uk; visit_from=none; ip=none; hosted=none }
F: adresson f5849dh9d { expire=2016-11-01; afexpire=2015-11-01 17; email=mike#gmail.com; Country=Germani; visit_from=none; ip=none; hosted=none }
my script
<?php
$user = "Mike"; // user that is inserted in page form
$email = "mike#gmail.com"; // email that is inserted in page form
$userFile = "Mike"; // user in txt file
$emailFile = "mike#gmail.com"; // email in txt file
if( $user == $userFile && $email == $emailFile ) {
echo "The user and email is used";
} elseif( $user == $userFile && $email != $emailFile ) {
echo "The user is used";
} else{
// do special code
}
I don't know how to read file txt from path and change user and email in file to value to make comprison
$userFile = "Mike"; // user in txt file (account.txt)
$emailFile = "mike#gmail.com"; // email in txt file (account.txt)
This is my spcial script that make output in (account.txt)
<?php
if (isset($_POST["g-recaptcha-response"])) {
$name = $_POST['name'];
$user = $_POST['user'];
$pass = $_POST['pass'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$country = $_POST['country'];
$plan = $_POST['plan'];
$quantity = $_POST['quantity'];
$payment = $_POST['payment'];
$reciever = $_POST['reciever'];
$captcha = $_POST['g-recaptcha-response'];
$message_user = $_POST['message'];
$serverip = $_POST['REMOTE_ADDR'];
$to = 'sup.alphas#gmail.com';
$parts = explode("#", $email);
$sufemail = $parts[0];
// $sufemail = substr(strstr($email, '#'), 1); for domain//
$subject_form = 'Request new account by '.$sufemail.'';
// Check if name has been entered
if (!$_POST['name']) {
$errName = 'Please enter your name';
}
// Check if name has been entered
if (!$_POST['user']) {
$errUser = 'Please enter your username';
}
// Check if name has been entered
if (!$_POST['pass']) {
$errPass = 'Please enter your password';
}
// Check if email has been entered and is valid
if (!$_POST['email']) {
$errEmail = 'Please enter a valid email address';
}
if (!$_POST['country']) {
$errCountry = 'Please enter your country';
}
if (!$_POST['plan']) {
$errPlan = 'Please enter your plan';
}
if (!$_POST['quantity']) {
$errQuantity = 'Please enter your quantity';
}
if (!$_POST['payment']) {
$errPayment = 'Please enter your method of payment';
}
if (!$_POST['g-recaptcha-response']) {
$errCaptcha = 'Please enter captcha';
}
// If there are no errors, send the email
if (!$errName && !$errUser && !$errPass && !$errEmail && !$errCountry && !$errPlan && !$errQuantity && !$errPayment && !$errCaptcha) {
// Start Create new account //
$dateadd = date('Y-m-d', strtotime("$plan"));
$datetry = date('Y-m-d H', strtotime("+1 day"));
$handle = fopen('/usr/www/users/alphacz/alpha/phpm/account.cfg', 'a');
fwrite($handle, 'F: ' . $_POST["user"] . ' ' . $_POST["pass"] . ' { expire=' . $datetry . '; afexpire=' . $dateadd . '; email=' . $email . '; Country=' . $country . '; visit_from=none; ip=none; hosted=' . $_POST['REMOTE_ADDR'] . " }\r\n");
fclose($handle);
Help me, please
Thank you

Answer 1

You can check a needle in a haystack which is your account file here.
username pattern is "F: {user} pass {..."
email pattern is "; email={email}; Country="
Note: You must also think that this excample check keywords incasesensitive, so
when searching and inserting, you should convert keywords to lowercase
$user_used = userExists('Mike');
$email_used = emailExists('mike#gmail.com');
if ($user_used && $email_used)
{
echo 'The user and email is used';
}
elseif ($user_used) {
echo 'The user is used';
}
else
{
//do special code
}
function userExists($user)
{
return (exec('grep ' . escapeshellarg('F: ' . $user . ' ') . ' {file-path}'));
}
function emailExists($email)
{
return (exec('grep ' . escapeshellarg('; email=' . $email . ';') . ' {file-path}'));
}

Answer 2

We could fix your current code to read from the file, but instead we first rewrite your code which writes to the file, so it will be way easier to read from the file afterwards.
(Since you only show part of the script which writes to the file I can only rewrite that part.)
Changes
JSON format for the file
Instead of writing your data into the file in a custom format we will save the data in JSON format. You can easily work with JSON in PHP since it has built-in functions to work with it.
$_POST ↔ $_SERVER ?
At some point you use $_POST['REMOTE_ADDR'], but I assume that you wanted to use $_SERVER["REMOTE_ADDR"]. See: http://php.net/manual/en/reserved.variables.server.php.
!$XY
While using !$XY as condition may work sometimes it isn't very practical. Since it simply negates the value and then checks if it is a truthy or falsey value and should enter the if statement or not. So I would recommend you to use !empty() to check if your input is set and is not empty.
Code
<?php
if (isset($_POST["g-recaptcha-response"])){
$checkPostIndices = ["name", "user", "pass", "email", "phone", "country", "plan", "quantity", "payment", "reciever", "g-recaptcha-response", "message"];
$data = [];
$errors = [];
$errorMessages = [
"name" => "Please enter your name",
"user" => "Please enter your username",
"pass" => "Please enter your password",
"email" => "Please enter a valid email address",
"phone" => "Please enter your phone number",
"country" => "Please enter your country",
"plan" => "Please enter your plan",
"quantity" => "Please enter your quantity",
"payment" => "Please enter your method of payment",
"reciever" => "Please eneter a reciever",
"g-recaptcha-response" => "Please enter captcha",
"message" => "Please enter a message",
];
foreach($checkPostIndices as $index){
if(!empty($_POST[$index])){
$data[$index] = $_POST[$index];
} else {
$errors[] = $errorMessages[$index];
}
}
$data["serverip"] = $_SERVER["REMOTE_ADDR"];
$to = "sup.alphas#gmail.com";
$sufemail = explode("#", $data["email"])[0];
$subject_form = "Request new account by " . $sufemail;
if(!empty($errors)){
$fileData = array_intersect_key($data, ["user", "pass", "email", "country", "serverip"]);
$fileData["dateadd"] = date("Y-m-d", strtotime($data["plan"]));
$fileData["datetry"] = date("Y-m-d H", strtotime("+1 day"));
$file = file_get_contents("/usr/www/users/alphacz/alpha/phpm/account.cfg");
$file = empty($file) ? [] : json_decode($file, TRUE);
$file[] = $fileData;
file_put_contents("/usr/www/users/alphacz/alpha/phpm/account.cfg", json_encode($file));
}
}
?>
So now after that your data should be stored in JSON like this:
[
{"key":"data"}
//...
]
And then you can easily use json_decode() to decode your file into an array, loop through the array and check if the email and user are already used.
Code
<?php
$user = "Mike";
$email = "mike#gmail.com";
$file = file_get_contents("/usr/www/users/alphacz/alpha/phpm/account.cfg");
$data = json_decode($file, TRUE);
foreach($data as $v){
if($v["user"] == $user && $v["email"] == $email){
echo "Email and user already used";
}
}
?>