lavandosovich

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" &&
php -r "if (hash_file('SHA384', 'composer-setup.php') === '669656bab3166a7aff8a7506b8cb2d1c292f042046c5a994c43155c0be6190fa0355160742ab2e1c88d40d5be660b410') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" &&
php composer-setup.php &&
php -r "unlink('composer-setup.php');" 

lavandosovich

sudo docker run -p 8080:3000 -v $(pwd):/var/www -w "/var/www" node npm start

• -p $p1:$p2
  • p - port
  • $p1 - host port
  • $p2 - container port
• -v $folder_1:$folder_2

• v - volume

lavandosovich

"Wierd" call of function

<?php
class Foo
{
    function Variable()
    {
        $name = 'Bar';
 $this-&gt;$name(); // This calls the Bar() method, $this-&gt;Bar()

lavandosovich

Difference {

Include

emit warning

Require

emit Fatal Error

lavandosovich

PHP type checking

• is_bool() Boolean One of the two special values, true or false
• is_integer() Integer A whole number. Alias of is_int() and is_long()
• is_double() Double A floating point number (a number with a decimal point). Alias
• of is_float()
• is_string() String Character data
• is_object() Object An object
• is_array() Array An array
• is_resource() Resource A handle for identifying and working with external resources

lavandosovich

OOP in PHP

Declaring class properties or methods as static makes them accessible without needing an instantiation of the class. A property declared as static can not be accessed with an instantiated class object (though a static method can).

Useful keywords:

self - self from the root

parent - parent of the class

static - true self for exact class, static is more agile than self, super useful for inheritance issues

lavandosovich

Grep

-i - searches for upper && lower cased
-v word - searches every row without word
-n - shows line number of occurence
-E - grep on steroids || egrep

grep -i "..cen" GNU - searches for all ..cen in GNU
grep "t[wo]o" GPL-3 - searches for too && two in GPL-3, because of [wo], which stands for ||

lavandosovich

cat /etc/passwd - list system users root:xD928Jhs7sH32:0:0:root:/root:/bin/bash newuser:Xv8Q981g71oKK:1000:100:John Smith:/home/newuser:/bin/bash

pattern - account:password:UID:GID:GECOS:directory:shell

account — имя пользователя password — зашифрованный пароль пользователя UID — идентификационный номер пользователя GID — идентификационный номер основной группы пользователя

lavandosovich

Functoins in PHP

Map passed values

   function add_some_extra(&$string)
    {
        $string .="and somthing extra.\n";
    }
    $str = 'This is a string, ';
    add_some_extra($str);
    echo $str;

lavandosovich

Command

sudo docker ps

flags

• -a all executed
• -q ids of containers only
• -l last executed