Laravel [Server Requirements][1] mention that `BCMath`, `Ctype`, `JSON`, `Mbstring`, `OpenSSL`, `PDO`, `Tokenizer`, and `XML` extensions are required. Most of the extensions are installed and enabled by default.

You can run the following command in Ubuntu to make sure the extensions are installed.

```
sudo apt install openssl php-common php-curl php-json php-mbstring php-mysql php-xml php-zip
```

PHP version specific installation (if PHP 7.4 installed)

```
sudo apt install php7.4-common php7.4-bcmath openssl php7.4-json php7.4-mbstring
```

You may need other PHP extensions for your composer packages. Find from links below.

[PHP extensions][2] for Ubuntu 20.04 LTS (Focal Fossa)

[PHP extensions][3] for Ubuntu 18.04 LTS (Bionic)

[PHP extensions][4] for Ubuntu 16.04 LTS (Xenial)

[1]: https://laravel.com/docs/5.8/installation#server-requirements
[2]: https://packages.ubuntu.com/focal/php/
[3]: https://packages.ubuntu.com/bionic/php/
[4]: https://packages.ubuntu.com/xenial/php/

**

New requirements for installing Laravel 8 and PHP 8:
----------------------------------------------------

**

```bash
sudo apt install php8.0-common php8.0-dom php8.0-bcmath openssl php8.0-mbstring
```

I want to set some **vectorDrawables** to a **ImageView** in Android Studio.

I can set png and jpg drawable easily but when i want to set VectorDrawable, it does not work on imageview.

    img.setImageResource(R.drawable.ic_home);

ic_home is VectorDrawable and this code doesn&#39;t work.


How to set VectorDrawable as an image for ImageView programmatically

I got this from the sklearn webpage:

* **Pipeline**: Pipeline of transforms with a final estimator

* **Make_pipeline**: Construct a Pipeline from the given estimators. This is a shorthand for the Pipeline constructor.

But I still do not understand when I have to use each one. Can anyone give me an example?


What is the difference between pipeline and make_pipeline in scikit?

I need to make my Ubuntu 16.04. Is there a way using the GUI or is the simplest way to do this by using terminal?

I have already installed PHP 7.1, MariaDB.

I need to enable:

 1. OpenSSL PHP Extension
 2. PDO PHP Extension
 3. Mbstring PHP Extension
 4. Tokenizer PHP Extension
 5. XML PHP Extension

How to install all required PHP extensions for Laravel?

I need to make my Ubuntu 16.04. Is there a way using the GUI or is the simplest way to do this by using terminal?
I have already installed PHP 7.1, MariaDB.
I need to enable:
<ol>
<li>OpenSSL PHP Extension</li>
<li>PDO PHP Extension</li>
<li>Mbstring PHP Extension</li>
<li>Tokenizer PHP Extension</li>
<li>XML PHP Extension</li>
</ol>

Per [laravel doc](https://laravel.com/docs/5.3/routing#route-groups), I can add the `auth` middleware as follows:

    Route::group([&#39;middleware&#39; =&gt; &#39;auth&#39;], function () {
        Route::get(&#39;/&#39;, function ()    {
            // Uses Auth Middleware
        });
    
        Route::get(&#39;user/profile&#39;, function () {
            // Uses Auth Middleware
        });
    });

I&#39;ve also seen middleware added as follows:
 
    Route::group([&#39;middleware&#39; =&gt; [&#39;web&#39;]], function() {
      // Uses all Middleware $middlewareGroups[&#39;web&#39;] located in /app/Http/kernel.php?
      Route::resource(&#39;blog&#39;,&#39;BlogController&#39;); //Make a CRUD controller
    });


How can I do both?

PS.  Any comments providing insight on what the bottom four lines of code are doing would be appreciated

Adding multiple middleware to Laravel route

I am trying to install a specific version of a package using Composer. I tried `composer install` and `composer require` but they are installing the latest version of the package. What if I want an older version?

How to install a specific version of package using Composer?

I want to use WhereIn and Groupby in the same query to fetch Result.

I&#39;ve tried this:

    $loadids=explode(&quot;#@*&quot;,$reciptdet-&gt;loading_id);
	$loadingdatas=DB::table(&#39;loading&#39;)-&gt;groupBy(&#39;vehicle_no&#39;)-&gt;whereIn(&#39;id&#39;,$loadids)-&gt;get();

But I got this error message:

&gt;SQLSTATE[42000]: Syntax error or access violation: 1055 &#39;sbrtpt.loading.id&#39; isn&#39;t in GROUP BY (SQL: select * from loading where id in (14, 15, 16) group by vehicle_no)

Laravel : Syntax error or access violation: 1055 Error

I am trying to extract objects from Model &quot;Users&quot; whose `created_at` date has been more than **30 days from today**.

Carbon::now() ==&gt; I want as ==&gt; Carbon::now() - 30days


    $users = Users::where(&#39;status_id&#39;, &#39;active&#39;)
                   -&gt;where( &#39;created_at&#39;, &#39;&lt;&#39;, Carbon::now())
                   -&gt;get();

How can this be achieved ?

Laravel Carbon subtract days from current date

While I am installing Magento 2 on my Server, I got an error. After investigating the code and found that there is are three dots (`...`), which is producing the error. I included the code I found below:
```php
return new $type(...array_values($args));
```
What is this operator called, and what is its purpose?

What is the meaning of three dots (...) in PHP?

    use App\Order;
     
    public function show(Order $order) {
        $data = $order-&gt;all();
        return dd($order-&gt;getQueryLog());


Is there any way to display the query built by Eloquent in Laravel?

I tried `getQueryLog();` but its not working

Laravel Eloquent display query log

I use Laravel 5.3. 

I have 2 tables :

    Articles
    ---------
    id
    cat_id
    title
And

    Category
    ---------
    id
    parent_id
    title

I have defined my relations in my models : 

    // Article model
    public function category()
    {
        return $this-&gt;belongsTo(Category::class);
    }

    // Category model
    public function children() 
	{
		return $this-&gt;hasMany(Category::class, &#39;parent_id&#39;, &#39;id&#39;);
	}	

Is there an easy way using Eloquent to have a list a categories with count of articles. The difficulty is that I want to group categories where `id_parent = 0`, i.e. I want to display only parent categories with count of articles in children.

I tried something like that :

		$category = new \App\Models\Category();
		$categoryTable = $category-&gt;getTable();
		
        return $category-&gt;leftJoin(&#39;article&#39;, &#39;article.cat_id&#39;, &#39;=&#39;, &#39;category.id&#39;)
			-&gt;whereIn(&#39;article.cat_id&#39;, function($query)
				{
					$query-&gt;select(&#39;cat_id&#39;)
						-&gt;from(&#39;categories&#39;)
						-&gt;where(&#39;categories.parent_id&#39;, ???)
						-&gt;orWhere($this-&gt;tableName .&#39;.cat_id&#39;, $id);
				})
			-&gt;groupBy(&#39;cat_id&#39;);

But I am lost...

Laravel eloquent get relation count

I am using Ubuntu 16.10 and recently installed Docker (v1.12.4) using the Xenial build by following the instructions found [here][1]. I haven&#39;t encountered any problems creating containers, ensuring they restart automatically, etc.

However, now every time I run **apt-get update** I receive the following error message:

    W: The repository &#39;https://apt.dockerproject.org/repo ubuntu-xenial Release&#39; does not have a Release file.
    N: Data from such a repository can&#39;t be authenticated and is therefore potentially dangerous to use.
    N: See apt-secure(8) manpage for repository creation and user configuration details.
    E: Failed to fetch https://apt.dockerproject.org/repo/dists/ubuntu-xenial/main/binary-amd64/Packages
    E: Some index files failed to download. They have been ignored, or old ones used instead.

I have tried to remedy the problem by following the advice found [here][2] and cannot seem to solve this problem.

Has anyone encountered this before and fixed it? If so, what is needed to resolve this?


  [1]: https://docs.docker.com/engine/installation/linux/ubuntulinux/
  [2]: https://github.com/docker/docker/issues/22599

Docker Repository Does Not Have a Release File on Running apt-get update on Ubuntu

I was recently going through the version of node in my ubuntu 16.04 when `node -v` command was used it shows me version 6.9.1 but when `nodejs -v` it shows 6.9.2 previously before using this commands `npm update` command was used.

Now what&#39;s these difference in `node -v` and `nodejs -v`? and how to update to the latest LTS version of node/nodejs?    

updating nodejs on ubuntu 16.04

I am trying to reset the root password following [MysqlPasswordReset][1] but when I try to start the server with --skip-grant-tables the server doesn&#39;t start

- Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-59-generic x86_64)
- mysql  Ver 14.14 Distrib 5.7.17, for Linux (x86_64)

Server is running

    $ mysql -u root
    ERROR 1045 (28000): Access denied for user &#39;root&#39;@&#39;localhost&#39; (using password: NO)

Stop server

    $ sudo /etc/init.d/mysql stop
    [ ok ] Stopping mysql (via systemctl): mysql.service.


Trying to start with --skip-grant-tables

    sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &amp;
    [1] 9856

  [1]: https://help.ubuntu.com/community/MysqlPasswordReset

Connect with no password

    $ mysql -u root
    ERROR 2002 (HY000): Can&#39;t connect to local MySQL server through socket &#39;/var/run/mysqld/mysqld.sock&#39; (2)
    [1]+  Exit 1                  sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking

I also tried to start with mysql_safe (error.log is empty)

    sudo mysqld_safe --skip-grant-tables
    2017-02-01T16:33:31.382105Z mysqld_safe Logging to syslog.
    2017-02-01T16:33:31.383942Z mysqld_safe Logging to &#39;/var/log/mysql/error.log&#39;.
    2017-02-01T16:33:31.386058Z mysqld_safe Logging to &#39;/var/log/mysql/error.log&#39;.
    2017-02-01T16:33:31.388009Z mysqld_safe Directory &#39;/var/run/mysqld&#39; for UNIX socket file don&#39;t exists.

Can&#39;t reset root password with --skip-grant-tables on ubuntu 16

I was trying to set default python version to `python3` in `Ubuntu 16.04`. By default it is `python2` (2.7). I followed below steps :  

    update-alternatives --remove python /usr/bin/python2
    update-alternatives --install /usr/bin/python python /usr/bin/python3

but I&#39;m getting the following error for the second statement,    

    rejeesh@rejeesh-Vostro-1015:~$ update-alternatives --install /usr/bin/python python /usr/bin/python3
    update-alternatives: --install needs &lt;link&gt; &lt;name&gt; &lt;path&gt; &lt;priority&gt;
    
    Use &#39;update-alternatives --help&#39; for program usage information.   

I&#39;m new to Ubuntu and Idon&#39;t know what I&#39;m doing wrong.



Unable to set default python version to python3 in ubuntu

I am trying to pull some json data from a remote server using `fromJSON`:

    &gt; server &lt;- &#39;http://111.111.000.00:3000&#39;
    &gt; streams &lt;- fromJSON(paste(server, &#39;/output/streams&#39;, sep=&quot;&quot;), flatten=TRUE)

Result:

    Error: Required package curl not found. 
    Please run: install.packages(&#39;curl&#39;)

So I tried to install it:

    &gt; install.packages(&quot;curl&quot;)
    Installing package into ‘/home/lauxxx/R/x86_64-pc-linux-gnu-library/3.3’
    (as ‘lib’ is unspecified)
    trying URL &#39;https://cran.rstudio.com/src/contrib/curl_2.3.tar.gz&#39;
    Content type &#39;application/x-gzip&#39; length 400460 bytes (391 KB)
    ==================================================
    downloaded 391 KB
    
    * installing *source* package ‘curl’ ...
    ** package ‘curl’ successfully unpacked and MD5 sums checked
    Using PKG_CFLAGS=
    Using PKG_LIBS=-lcurl
    ------------------------- ANTICONF ERROR ---------------------------
    Configuration failed because libcurl was not found. Try installing:
     * deb: libcurl4-openssl-dev (Debian, Ubuntu, etc)
     * rpm: libcurl-devel (Fedora, CentOS, RHEL)
     * csw: libcurl_dev (Solaris)
    If libcurl is already installed, check that &#39;pkg-config&#39; is in your
    PATH and PKG_CONFIG_PATH contains a libcurl.pc file. If pkg-config
    is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
    R CMD INSTALL --configure-vars=&#39;INCLUDE_DIR=... LIB_DIR=...&#39;
    --------------------------------------------------------------------
    ERROR: configuration failed for package ‘curl’
    * removing ‘/home/lauxxx/R/x86_64-pc-linux-gnu-library/3.3/curl’
    Warning in install.packages :
      installation of package ‘curl’ had non-zero exit status
    
    The downloaded source packages are in
    	‘/tmp/RtmpdoavNf/downloaded_packages’

Then I tried to install `libcurl4-openssl-dev`:

    &gt; install.packages(&quot;libcurl4-openssl-dev&quot;)
    Installing package into ‘/home/lau/R/x86_64-pc-linux-gnu-library/3.3’
    (as ‘lib’ is unspecified)
    Warning in install.packages :
      package ‘libcurl4-openssl-dev’ is not available (for R version 3.3.1)

Why? What is going wrong? How can I fix it?

It was ok when I was on Xubuntu 16.04. But now I am on Kubuntu 16.10.

Any ideas?

Configuration failed because libcurl was not found

I have a `Dockerfile` with a build command like this:


    #install some base extensions
    RUN apt-get install -y \
            zlib1g-dev \
            zip \
      &amp;&amp; docker-php-ext-install zip


I get this warning from build output:

&gt; WARNING: Use of bundled libzip is deprecated and will be removed.  
&gt; configure: WARNING: Some features such as encryption and bzip2 are not available.  
&gt; configure: WARNING: Use system library and --with-libzip is
&gt; recommended.

What is the correct way to install the zip extension without these warnings?

My complete Dockerfile looks like:

    FROM php:7.2-apache
    
    RUN apt-get clean
    RUN apt-get update
    
    #install some basic tools
    RUN apt-get install -y \
            git \
            tree \
            vim \
            wget \
            subversion
    
    #install some base extensions
    RUN apt-get install -y \
            zlib1g-dev \
            zip \
      &amp;&amp; docker-php-ext-install zip
    
    #setup composer
    RUN curl -sS https://getcomposer.org/installer | php \
            &amp;&amp; mv composer.phar /usr/local/bin/ \
            &amp;&amp; ln -s /usr/local/bin/composer.phar /usr/local/bin/composer
    
    
    WORKDIR /var/www/

Content Type	Original Author	Original Content on Stackoverflow
Question	Aipo	View Question on Stackoverflow
Solution 1 - Php	Madan Sapkota	View Answer on Stackoverflow
Solution 2 - Php	Paul	View Answer on Stackoverflow

How to install all required PHP extensions for Laravel?

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

New requirements for installing Laravel 8 and PHP 8:

What is the difference between pipeline and make_pipeline in scikit?

How to set VectorDrawable as an image for ImageView programmatically

Attributions