Sending a mail in PHP with Linux - php

Question

I have a program which works perfectly to send a mail in PHP using Windows, but now I want to send it using a cronjob in Linux to execute it everyday. What do I need to do to work in Linux? Do I need to configure the php.ini file, sendmail etc. like I did in Windows?
Here is the program I've used for sending the email.
<?php
ini_set('max_execution_time', 600);
require 'class.phpmailer.php';
$host = ".....";
$user = "....";
$pass = ".....";
$db = "......";
$con1 = pg_connect("host=$host dbname=$db user=$user password=$pass")
or die ("Could not connect to server\n");
$query1 = "select commands.author, users.badge_no
from commands
inner join users
on commands.author=users.username";
$rs1 = pg_query($con1, $query1) or die("Cannot execute query: $query\n");
$query = "SELECT distinct commands_details.delivery_date,commands_details.command_no,commands.author,commands_details.name
FROM commands_details
inner join commands
on commands_details.command_no=cast(commands.id as varchar)";
$rs = pg_query($con1, $query) or die("Cannot execute query: $query\n");
$nume=array();
$mail1=array();
while ($row = pg_fetch_row($rs1)){
$nume[]=$row[0];
$mail1[]=$row[1];
}
$arrlength = count($nume);
$var_data='2016-06-19';
$mail_trimitere=array();
while ($row = pg_fetch_row($rs)) {
if(strpos($row[0], $var_data) !== false){
for($j=0;$j<$arrlength;$j++){
if($row[2]===$nume[$j]){
$mail_trimitere[0]=$mail1[$j];
echo $mail_trimitere[0];
break;
}
}
$mail = new PHPMailer();
$mail->IsSMTP();
$mail->Mailer = 'smtp';
$mail->SMTPAuth = true;
$mail->Host = 'smtp.gmail.com';
$mail->Port = 587;
$mail->SMTPSecure = 'tls';
$mail->Username = "......";
$mail->Password = "........";
$mail->IsHTML(true); // if you are going to send HTML formatted emails
$mail->SingleTo = true;
$mail->From = "......";
$mail->FromName = ".......";
$mail->addAddress(".........","robert");
$mail->Subject = "Testing PHPMailer with localhost";
$mail->Body = 'urmeaza sa primiti maine comanda cu numarul '.' '.$row[1].' '.'produs'.' '. $row[3].' '. 'in data de '.' '.$row[0];
if(!$mail->Send())
echo "Message was not sent <br />PHPMailer Error: " . $mail->ErrorInfo;
else
echo "Message has been sent";
}
}
pg_close($con1);
?>