$str_time = "23:12:95";

$str_time = preg_replace("/^([\d]{1,2})\:([\d]{2})$/", "00:$1:$2", $str_time);

sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);

$time_seconds = $hours * 3600 + $minutes * 60 + $seconds;

And if you don't want to use regular expressions:

$str_time = "2:50";

sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);

$time_seconds = isset($seconds) ? $hours * 3600 + $minutes * 60 + $seconds : $hours * 60 + $minutes;

The three variables

$variable

,

$Variable

and

$VARIABLE

are completely different

// lowercase
$variable = "Value 1";

// PascalCase
$Variable = "Value 2";

// UPPERCASE
$VARIABLE = "Value 3";

echo $variable . "\n";
echo $Variable . "\n";
echo $VARIABLE . "\n";

Function names are case-insensitive

function printGreeting() {
	print "Prints: Hello world!\n";
}
printGreeting();

Calling the function with uppercase will still work

Function

strlen()

returns the length of the string

echo strlen("Hello world!")."\n"; // 12

Function

strrev()

returns the Reverse of the string

echo strrev("Hello world!")."\n"; // !dlrow olleH

Function

strpos()

tries to find the second parameter and returns its index

echo strpos("Hello world!", "world")."\n"; // 6

Function

str_replace()

replaces the word "Hello" with "Hi"

echo str_replace("Hello", "Hi", "Hello there")."\n"; // Hi there

Function

substr()

returns the substring between given indexes

echo substr("Hello world", 6)."\n"; // world
echo substr("Hello world", 6, 3)."\n"; // wor
echo substr("Hello world", -5)."\n"; // world
echo substr("Hello world", -4, 2)."\n"; // or

Function

trim()

removes whitespaces from sides of the string

echo trim("   Hello World  ").".\n"; // Hello World.
// Removes whitespaces from the right end
echo rtrim("   Hello World  ")."\n"; //    Hello World
// Removes Exclamation mark from the right end
echo rtrim("Hello World!", "!")."\n"; // Hello World

Function

strtoupper()

converts the string to upper case

echo strtoupper("Hello World")."\n";

Function

strtolower()

converts the string to lower case

echo strtolower("Hello World")."\n";

Function

explode()

breaks the string by its delimiter

print_r (explode(" ", "It's the first day of the course!"));

Function

implode()

joins the array element based on the delimiter and returns the string

echo implode(" ", ['Hello', 'World']);

The code will output "Have a nice weekend!" if the current day is Friday, otherwise - "Have a nice day!"

$d = date("D");
if($d == "Fri"){
    echo "Have a nice weekend!";
} else{
    echo "Have a nice day!";
}
echo "\n";

Output "Have a good day!" if the current time is less than 20, and "Have a good night!" otherwise:

$t = date("H");
if ($t < "20") {
    echo "Have a good day!";
} else {
    echo "Have a good night!";
}

If

$age

is more than

18

, prints

Adult

otherwise prints

Child

$age = 20;
if ($age > 18) {
    echo 'Adult';	
} else {
    echo 'Child';	
}

Function that does something

function printGreeting() {
	print "Prints: Hello world!\n";
}
printGreeting();

Function that returns something

function returnGreeting() {
	return "Returns: Hello world!\n";
}
echo returnGreeting();

Parameterized function that doubles the number

function doubleMe($number) {
	$result = "$number times 2 is: " . $number * 2 . "\n";
	return $result;
}
echo doubleMe(4);

Function calculates the sum of two numbers

function add($num1, $num2) {
	$sum = $num1 + $num2;
	$result = "Sum of $num1 and $num2 is: $sum";
	return $result;
}
echo add(4, 5);

if

has only one section:

Condition

if (Condition) {
    // Code to be executed
}

for

loop has three sections divided by

;

for (Initialization;   Condition;   Increment/Decrement) {
    // Code to be executed
}

The loop prints numbers from 0 to 10

for ($i = 0;  $i < 10;  $i ++) {
	echo $i . "\n";
}

IF - კოდი სრულდება, თუ პირობა ჭეშმარიტია; IF...ELSE - თუ პირველი პირობა (IF) ჭეშმარიტია დაიბეჭდება იგი, ხოლო თუ მცდარია დაიბეჭდეება მეორე კოდი; IF...ELSEIF...ELSE - ჯერ პირველი პირობა მოწმდება (IF) და სრულდება კოდი თუ ჭეშმარიტია იგი, ხოლო თუ მცდარია შემდეგ მოწმდება მეორე პირობის სისწორე(ELSEIF) და სრულდება იგი, თუ ისიც მცდარია მაშინ სრულდება ELSE კონდიცია; ახლა ვნახოთ ერთი პრაქტიკული მაგალითი:

$კამათელი1 = rand(1, 6);                                            // შემთხვევითობის პრინციპით ამოსული კამათელი 1-დან 6-მდე
$კამათელი2 = rand(1, 6);                                            // შემთხვევითობის პრინციპით ამოსული მეორე კამათელი 1-დან 6-მდე

if  ($კამათელი1 == $კამათელი2) {                                                 // I პირობა
    echo "WOOW გაგორდა წყვილი";                                                // თუ შესრულდება დაიბეჭდება ეს
    } else if ($კამათელი1 > 3 && $კამათელი2 > 3) {                                                   // მეორე პირობა
    echo "მაინც კარგი სეტია რადგან ორივე კამათელი 3-ზე მაღალია";    // თუ შესრულდა მეორე პირობა დაიბეჭდება ეს
    } else if ($კამათელი1 > 3 || $კამათელი2 > 3) {                                                       // მესამე პირობა
    echo "არაუშავს რადგან ერთი კამათელი მაინც მეტია 3-ზე";               // თუ შესრულდა მესამე პირობა დაიბეჭდება ეს
    } else {                                                                      // თუ არცერთი პირობა არ შესრულდება დაიბეჭდოს თავიდან სცადე                  
    echo "თავიდან სცადე";
    }

P.S პირობაში

&&

არის

"და"

პირობაში

||

არის

"ან"

$a = rand(0, 10); $b = rand(0, 10); $c = rand(0, 10); echo " $a", " $b", " $c" . '<br>'; if($a == 7 && $b ==7 && $c== 7 ){ echo 'u won jackpot'; } elseif($a ==7 && $b!==$a && $c!==$a) { echo 'last and middel number are not 7'; } elseif($a !==$b && $b==7 && $c!==$b) { echo 'last and first number are not 7'; } elseif($a !==$c && $b!==$c && $c ==7) { echo 'middel and first number are not seven'; } elseif($a ==7 && $b==7 && $c!==$b) { echo "last number is not 7"; } elseif($a !==$b && $b==7 && $c==7) { echo "first number is not 7"; } elseif($a ==7 && $b!==$a && $c!==7) { echo 'middel number is not 7' ; } else{ echo 'try again'; }

Now we need to give the web server user write access to the storage and cache folders, where Laravel stores application-generated files:

sudo chown -R www-data.www-data /var/www/your_domain/storage
sudo chown -R www-data.www-data /var/www/your_domain/bootstrap/cache
sudo chgrp -R www-data storage bootstrap/cache
sudo chmod -R ug+rwx storage bootstrap/cache

create a new virtual host configuration file at

/etc/nginx/sites-available

:

sudo nano /etc/nginx/sites-available/your_domain

The following configuration file contains the recommended settings for Laravel applications on Nginx:

server {
    listen 80;
    server_name server_domain_or_IP;
    root /var/www/your_domain/public;

    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";

    index index.html index.htm index.php;

    charset utf-8;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }

    error_page 404 /index.php;

    location ~ \.php$ {
        fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
        include fastcgi_params;
    }

    location ~ /\.(?!well-known).* {
        deny all;
    }
}

Copy this content to your /etc/nginx/sites-available/travellist file and, if necessary, adjust the highlighted values to align with your own configuration. Save and close the file when you’re done editing. To activate the new virtual host configuration file, create a symbolic link to travellist in sites-enabled:

sudo ln -s /etc/nginx/sites-available/your_domain /etc/nginx/sites-enabled/

To confirm that the configuration doesn’t contain any syntax errors, you can use:

sudo nginx -t

You should see output like this:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

To apply the changes, reload Nginx with:

sudo systemctl reload nginx

Now go to your browser and access the application using the server’s domain name or IP address, as defined by the server_name directive in your configuration file:

http://server_domain_or_IP

log in with this command in terminal:

mysql -u [username] -p

making a new user within the MySQL shell

CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password';

Therefore, the first thing to do is to provide the user with access to the information they will need.

GRANT ALL PRIVILEGES ON * . * TO 'newuser'@'localhost';

Once you have finalized the permissions that you want to set up for your new users, always be sure to reload all the privileges.

FLUSH PRIVILEGES;

How To Grant Different User Permissions

Here is a short list of other common possible permissions that users can enjoy. ALL PRIVILEGES- as we saw previously, this would allow a MySQL user full access to a designated database (or if no database is selected, global access across the system) CREATE- allows them to create new tables or databases DROP- allows them to them to delete tables or databases DELETE- allows them to delete rows from tables INSERT- allows them to insert rows into tables SELECT- allows them to use the SELECT command to read through databases UPDATE- allow them to update table rows GRANT OPTION- allows them to grant or remove other users’ privileges To provide a specific user with a permission, you can use this framework:

To GRANT ALL

privileges to a user, allowing that user full control over a specific database, use the following syntax:

GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';

GRANT type_of_permission ON database_name.table_name TO 'username'@'localhost';

revoke a permission, the structure is almost identical to granting it:

REVOKE type_of_permission ON database_name.table_name FROM 'username'@'localhost';

review a user’s current permissions by running the following:

SHOW GRANTS FOR 'username'@'localhost';

delete databases with DROP, you can use DROP to delete a user altogether:

DROP USER 'username'@'localhost';

log out by typing:

quit