Dev {Tricks}

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Artisan syntax error

Problem:

  • PHP Parse error: syntax error, unexpected ‘class’ (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or ‘{‘ or ‘$’ in …/artisan on line 31
  • $kernel = $app->make(Illuminate\Contracts\Console\Kernel::class);

Solution:

::class is only available from PHP 5.5 onward, So updating php version of the SERVER will solve the problem.

First check php version of your server with command line.

php -v

Note that phpinfo() may give different version that with the php -v

 

 

 

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Slick – Carousel you’ll ever need

Features

    • Fully responsive. Scales with its container.
    • Separate settings per breakpoint
    • Uses CSS3 when available. Fully functional when not.
    • Swipe enabled. Or disabled, if you prefer.
    • Desktop mouse dragging
    • Infinite looping.
    • Fully accessible with arrow key navigation
    • Add, remove, filter & unfilter slides
  • Autoplay, dots, arrows, callbacks, etc…

Demo link

Download

Adding RTL option

Just add the following css

.slick-slider .slick-track, .slick-slider .slick-list {
direction: ltr;
}

Responsive Slick

Add following lines to javascript.

 responsive: [
{
breakpoint: 1024,
settings: {
slidesToShow: 3,
slidesToScroll: 1,
}
},
{
breakpoint: 600,
settings: {
slidesToShow: 2,
slidesToScroll: 2
}
},
{
breakpoint: 480,
settings: {
slidesToShow: 1,
slidesToScroll: 1
}
}
// You can unslick at a given breakpoint now by adding:
// settings: "unslick"
// instead of a settings object
]

 

 

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Apache Server Status for 127.0.0.1 (via 127.0.0.1) Requests List

Apache Server Status Requests

  • done, streams: 0/1/1/0/0 (open/recv/resp/push/rst)
  • idle, streams: 0/1/1/0/0 (open/recv/resp/push/rst)
  • GET /xmlrpc.php HTTP/1.1
  • GET /robots.txt HTTP/1.1
  • POST /wp-login.php HTTP/1.1
  • HEAD / HTTP/1.1
  • GET / HTTP/1.0
  • GET / HTTP/1.1

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How to Stop XML-RPC Attack in WordPress

WordPress utilizes XML-RPC to remotely execute functions for example JetPack, WordPress mobile application etc.  But XMLRPC Attack made web server jam. In HTTP access log, we saw a lot of requests like this:

61.135.232.103 - - [11/Sep/2020:10:27:20 -0500] "POST /xmlrpc.php HTTP/1.1" 200 401 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
91.132.142.57 - - [11/Sep/2020:10:39:03 -0500] "POST /xmlrpc.php HTTP/1.1" 200 401 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
5.33.187.36 - - [11/Sep/2020:10:43:28 -0500] "POST /xmlrpc.php HTTP/1.1" 200 401 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"

You will also get “Error connecting to database” message when your WordPress site is down.

Solutions

We can secure server from XMLRPC attacks in several ways

  • We can add a HTTP directive to httpd.conf or .htaccess for denying all requests on /xmlrpc.php. 
    <files xmlrpc.php>
  Order allow,deny
  Deny from all
</files>

    If don’t have httpd.conf or .htaccess, we can simply rename the filename.

    • Where is httpd.conf? 
      /etc/httpd/conf/httpd.conf
    • DirectAdmin: File Editor
    • Webmin: Others > File Manager
  • Installing the Jetpack Plugin can block the XML-RPC requests with its “Protect” function.

 

 

 

 

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How to Install Webmin on CentOS 8

Webmin is a free, open source and web-based Linux/Unix system administration control panel. Webmin is similar to cPanel, DirectAdmin etc and provides an easy way to manage websites. With Webmin we can set up user accounts, manager Apache web server, DNS Server, samba and File configuration, FTP, email servers, local/remote filesystems, package management, manage database servers e.t.c.

First, install Perl and required dependencies.

sudo yum -y install @perl

Add repository content to CentOS 8 system.

sudo tee  /etc/yum.repos.d/webmin.repo<<EOF
[Webmin]
name=Webmin Distribution Neutral
baseurl=https://download.webmin.com/download/yum
enabled=1
EOF

Then import repository GPG key:

sudo rpm --import http://www.webmin.com/jcameron-key.asc

Then install webmin using yum package manager.

sudo dnf install webmin

Type y to accept installation:

Importing GPG key 0x8483C65D: y

To get the package version and other details, use:

rpm -qi webmin

Configure Webmin on CentOS 8

Install Virtualmin

1. Ensure your server is up to date

sudo yum update -y

2. Download the Virtualmin installer script using wget

sudo wget http://software.virtualmin.com/gpl/scripts/install.sh

3. Execute the install script

sudo sh install.sh