Attach Database Backup file in E-Mail send not working - php

Question

I am using following code to take backup of my mysql database.
With this code, a file is created and get saved in same folder where this script is kept. It is working perfectly.
I am trying to email this file using phpmailer. But I am stucked as no file is getting attached to receiving email. (email is delivered without attached file...)
Basic code is taken from https://write.corbpie.com/php-pdo-mysql-backup-script-with-compression-option/
Help is appreciated... and thank you in advanced...
Backup creating code part is as follows :
<?php
include_once("../../include/mysqli_constants.php");
require("../../PHPMailer/class.phpmailer.php");
$db_server = constant('HST');
$db_name = constant('DBN');
$db_user = constant('USR');
$db_pass = constant('PWD');
$site_url = constant('FILEROOT');
$from_email = constant('FROMEMAIL');
$from_name = constant('FROMNAME');
$mail_to1 = 'mypersonal#gmail.com';
$mail_to1_name = 'Dr Manish Joshi';
$mail_to2 = '';
$mail_to2_name = '';
$save_dir = './';
$file_name_prefix = 'my_website_';
$date = strtolower(date('d_F_Y_H_i_s_A'));
/* Do NOT EDIT BELOW */
$backup_config = array(
'DB_HOST' => $db_server,////Database hostname
'DB_NAME' => $db_name,//Database name to backup
'DB_USERNAME' => $db_user,//Database account username
'DB_PASSWORD' => $db_pass,//Database account password
'INCLUDE_DROP_TABLE' => false,//Include DROP TABLE IF EXISTS
'SAVE_DIR' => '',//Folder to save file in
'SAVE_AS' => $file_name_prefix,//Prepend filename
'APPEND_DATE_FORMAT' => 'Y_m_d_H_i_s',//Append date to file name
'TIMEZONE' => 'Asia/Kolkata',//Timezone for date format
'COMPRESS' => true,//Compress into gz otherwise keep as .sql
);
echo backupDB($backup_config);
Email sending part is as follows :
$mail = new PHPMailer();
$mail->IsHTML(true);
$mail->Host = constant('EMAILHOST');
$mail->AddAddress(''.$mail_to1.'', ''.$mail_to1_name.'');
$mail->IsSMTP();
$mail->SMTPAuth = constant('SMTPAuth');
$mail->SMTPSecure = 'tls';
$mail->Mailer = "smtp";
$mail->SMTPDebug = constant('SMTPDEBUG');
$mail->Username = constant('SMTPUSERNAME');
$mail->Password = constant('SMTPPASSWORD');
$mail->Port = 587;
$mail->From = constant('FROMEMAIL');
$mail->FromName = constant('FROMNAME');
$mail->WordWrap = 50;
$mail->Subject = '['.$from_name.'] Cron Backup MySQL On - ' . $date;
$mail->Body = $save_string.' File is attached via cron';
$mail->AddAttachment($save_string);
if (!$mail->AddAttachment($save_string)) {
echo 'Erreur : ' . $mail->ErrorInfo . "\n";
$mail->Body .= "\n" . 'Erreur : ' . $mail->ErrorInfo;
}
if (!$mail->Send()){
echo 'Message could not be sent. <p>';
echo 'Mailer Error: ' . $mail->ErrorInfo;
exit;
}
echo 'Message has been sent';
Function to create database backup is as follows and it is working OK and creating db backup and saving file in folder.
/* FUNCTION Starts */
function backupDB(array $config): string {
$db = new PDO("mysql:host={$config['DB_HOST']};dbname={$config['DB_NAME']}; charset=utf8", $config['DB_USERNAME'], $config['DB_PASSWORD']);
$db->setAttribute(PDO::ATTR_ORACLE_NULLS, PDO::NULL_NATURAL);
date_default_timezone_set($config['TIMEZONE']);
$do_compress = $config['COMPRESS'];
if ($do_compress) {
$save_string = $config['SAVE_AS'] . $config['SAVE_DIR'] . date($config['APPEND_DATE_FORMAT']) . '.sql.gz';
$zp = gzopen($save_string, "a9");
} else {
$save_string = $config['SAVE_AS'] . $config['SAVE_DIR'] . date($config['APPEND_DATE_FORMAT']) . '.sql';
$handle = fopen($save_string, 'a+');
}
//array of all database field types which just take numbers
$numtypes = array('tinyint', 'smallint', 'mediumint', 'int', 'bigint', 'float', 'double', 'decimal', 'real');
$return = "";
$return .= "CREATE DATABASE `{$config['DB_NAME']}`;\n";
$return .= "USE `{$config['DB_NAME']}`;\n";
//get all tables
$pstm1 = $db->query('SHOW TABLES');
while ($row = $pstm1->fetch(PDO::FETCH_NUM)) {
$tables[] = $row[0];
}
//cycle through the table(s)
foreach ($tables as $table) {
$result = $db->query("SELECT * FROM $table");
$num_fields = $result->columnCount();
$num_rows = $result->rowCount();
if ($config['INCLUDE_DROP_TABLE']) {
$return .= 'DROP TABLE IF EXISTS `' . $table . '`;';
}
//table structure
$pstm2 = $db->query("SHOW CREATE TABLE $table");
$row2 = $pstm2->fetch(PDO::FETCH_NUM);
$ifnotexists = str_replace('CREATE TABLE', 'CREATE TABLE IF NOT EXISTS', $row2[1]);
$return .= "\n\n" . $ifnotexists . ";\n\n";
if ($do_compress) {
gzwrite($zp, $return);
} else {
fwrite($handle, $return);
}
$return = "";
//insert values
if ($num_rows) {
$return = 'INSERT INTO `' . $table . '` (';
$pstm3 = $db->query("SHOW COLUMNS FROM $table");
$count = 0;
$type = array();
while ($rows = $pstm3->fetch(PDO::FETCH_NUM)) {
if (stripos($rows[1], '(')) {
$type[$table][] = stristr($rows[1], '(', true);
} else {
$type[$table][] = $rows[1];
}
$return .= "`" . $rows[0] . "`";
$count++;
if ($count < ($pstm3->rowCount())) {
$return .= ", ";
}
}
$return .= ")" . ' VALUES';
if ($do_compress) {
gzwrite($zp, $return);
} else {
fwrite($handle, $return);
}
$return = "";
}
$counter = 0;
while ($row = $result->fetch(PDO::FETCH_NUM)) {
$return = "\n\t(";
for ($j = 0; $j < $num_fields; $j++) {
if (isset($row[$j])) {
//if number, take away "". else leave as string
if ((in_array($type[$table][$j], $numtypes)) && (!empty($row[$j]))) {
$return .= $row[$j];
} else {
$return .= $db->quote($row[$j]);
}
} else {
$return .= 'NULL';
}
if ($j < ($num_fields - 1)) {
$return .= ',';
}
}
$counter++;
if ($counter < ($result->rowCount())) {
$return .= "),";
} else {
$return .= ");";
}
if ($do_compress) {
gzwrite($zp, $return);
} else {
fwrite($handle, $return);
}
$return = "";
}
$return = "\n\n-- ------------------------------------------------ \n\n";
if ($do_compress) {
gzwrite($zp, $return);
} else {
fwrite($handle, $return);
}
$return = "";
}
$error1 = $pstm2->errorInfo();
$error2 = $pstm3->errorInfo();
$error3 = $result->errorInfo();
echo $error1[2];
echo $error2[2];
echo $error3[2];
if ($do_compress) {
gzclose($zp);
} else {
fclose($handle);
}
return "{$config['DB_NAME']} saved as $save_string";
}
?>

Answer 1

I have edited this code and now it is working...
Edited code kept on github...
https://github.com/vaidyamanishjoshi/db-backup-with-pdo-and-email-it