Since your regex has a pipe in it, you have to use an array:

&lt;!-- language: lang-php --&gt;

    public static $rules_save = [
        &#39;class_subjects&#39; =&gt; [&#39;required&#39;, &#39;regex:/[0-9]([0-9]|-(?!-))+/&#39;],
    ];

From [the docs](http://laravel.com/docs/5.1/validation#rule-regex):

&gt; When using the `regex` pattern, it may be necessary to specify rules in an array instead of using pipe delimiters, especially if the regular expression contains a pipe character.

My application worked fine until I tried to add a library to it. After I added the library, Android Studio gives me the following error:

&gt; Error:(26) No resource identifier found for attribute
&gt; &#39;layout_behavior&#39;  in package &#39;inf..&#39;

This is my build.gradle file: 

    dependencies {
        compile fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])
        compile &#39;com.android.support:appcompat-v7:23.0.1&#39;
        compile &#39;com.android.support:support-v4:23.0.1&#39;
        compile &#39;com.ogaclejapan.smarttablayout:utils-v4:1.3.0@aar&#39;
        compile &#39;com.ogaclejapan.smarttablayout:library:1.3.0@aar&#39;
        compile &#39;com.jpardogo.materialtabstrip:library:1.1.0&#39;
        // compile &#39;com.lorentzos.swipecards:library:1.0.9@aar&#39;
        compile &#39;com.android.support:cardview-v7:21.0.3&#39;
        compile &#39;com.android.support:recyclerview-v7:21.0.3&#39;
        compile &#39;com.melnykov:floatingactionbutton:1.3.0&#39;
        compile project(&#39;:swipelib&#39;)
    }

This is the xml which causes the error:

     &lt;android.support.v4.view.ViewPager
        android:id=&quot;@+id/viewpager&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        app:layout_behavior=&quot;@string/appbar_scrolling_view_behavior&quot;/&gt;

I tried the following:

 - Removed the library
 - Reset Android Studio and my computer
 - Reverted to previous version of my code from git.

However, the error persists. How do I resolve this?

No resource identifier found for attribute &#39;layout_behavior&#39; in package

I have read a lot of articles and still cant get understand this part.

Consider this code :

        private async void button1_Click(object sender, EventArgs e)
        {
            await Dosomething();
        }

        private async Task&lt;string&gt; Dosomething()
        {
            await Task.Run((() =&gt; &quot;Do Work&quot;));
            return &quot;I am done&quot;;
        }

**First question:** 

When I click the button, it will Call DoSomething and await a Task that creates a Thread from the threadpool by calling Task.Run ( if I am not mistaken ) and all of this runs asynchronously. So I achieved creating a thread that does my work but doing it asynchronously? But consider that I don&#39;t need any result back, i just want the work to be done without getting any result back, is there really a need to use async/await , and if so, how?

**Second question:**

When running a thread asynchronously, how does that work? Is it running on the main UI but on a separate thread or is it running on a separate thread and separate is asynchronously inside that method? 

Is Async/Await using Task.Run starting a new thread asynchronously?

Im working on Laravel 4.2. Im trying to use Validator to validate a name field with regex, here is my rule below:

     public static $rules_save = [
    		
    		&#39;class_subjects&#39; =&gt; &#39;required|regex:/[0-9]([0-9]|-(?!-))+/&#39;
    	];

But as soon as I call the rule to be validated an error is thrown, see below:

    preg_match(): No ending delimiter &#39;/&#39; found

Laravel preg_match(): No ending delimiter &#39;/&#39; found

Im working on Laravel 4.2. Im trying to use Validator to validate a name field with regex, here is my rule below:
<pre><code class="hljs language-ini"> public static $rules_save = [
		
		'class_subjects' => 'required|regex:/[0-9]([0-9]|-(?!-))+/'
	];
</code></pre>
But as soon as I call the rule to be validated an error is thrown, see below:
<pre><code class="hljs language-scss">preg_match(): No ending delimiter '/' found
</code></pre>

How can I get the previous URL visited on the website in Laravel 5.1?

In Laravel 4 I just needed to write it like below:

    {{ URL::previous() }}



Go back URL in Laravel 5.1

I try  to install Laravel 5.1 on a host which only has PHP 5.5.6. While I asked the customer to upgrade, this might be not possible/feasible.

So I am getting:

    - This package requires php &gt;=5.5.9 but your PHP version (5.5.6)
       does not satisfy that requirement.

on `composer.phar install`.

Is there a way to do a composer install which ignores this dependency?

I think it should be safe, as there are only bug-fixes from 5.5.6 to 5.5.9.

Override PHP base dependency in composer

I am using Lumen framework. How can I change Timezone to Europe/Paris CEST?

I added a variable in my `.env` file:

    APP_TIMEZONE=Europe/Paris

But this doesn&#39;t work. What is the right way to update the timezone?

Change Timezone in Lumen or Laravel 5

So it looks like the new &#39;System Integrity Protection&#39; [lockdown][1] of /usr (among other directories) makes pear and pecl a non-starter. Has anyone found a workaround short of disabling it? 


  [1]: http://arstechnica.com/apple/2015/09/os-x-10-11-el-capitan-the-ars-technica-review/8/

Installing pecl and pear on OS X 10.11 El Capitan, macOS 10.12 Sierra, macOS 10.13 High Sierra (&lt; 10.13.3)

Following is my file *2015_09_14_051851_create_orders_table.php*.
And I want to change `$table-&gt;integer(&#39;category_id&#39;);` as a string with new migration.


    &lt;?php
    
    use Illuminate\Database\Schema\Blueprint;
    use Illuminate\Database\Migrations\Migration;
    
    class CreateOrdersTable extends Migration {
    
    	/**
    	 * Run the migrations.
    	 *
    	 * @return void
    	 */
    	public function up()
    	{
    		Schema::create(&#39;orders&#39;, function(Blueprint $table)
    		{
    			$table-&gt;increments(&#39;id&#39;);
    			$table-&gt;string(&#39;num&#39;);
    			$table-&gt;integer(&#39;user_id&#39;);
    
    			$table-&gt;text(&#39;store_name&#39;);
    			$table-&gt;integer(&#39;store_name_publication&#39;);
    
    			$table-&gt;string(&#39;postal_code&#39;, 255);
    			$table-&gt;string(&#39;phone_number&#39;, 255);
    
    			$table-&gt;text(&#39;title&#39;);
    			$table-&gt;text(&#39;description&#39;);
    
    			$table-&gt;string(&#39;list_image_filename1&#39;, 255);
    			$table-&gt;string(&#39;list_image_filename2&#39;, 255)-&gt;nullable();
    			$table-&gt;string(&#39;list_image_filename3&#39;, 255)-&gt;nullable();
    			$table-&gt;string(&#39;list_image_filename4&#39;, 255)-&gt;nullable();
    			$table-&gt;string(&#39;list_image_filename5&#39;, 255)-&gt;nullable();
    
    			$table-&gt;integer(&#39;term&#39;);
    
    			$table-&gt;datetime(&#39;state0_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state1_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state2_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state3_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state4_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state5_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state6_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state7_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state8_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state9_at&#39;)-&gt;nullable();
    			$table-&gt;datetime(&#39;state10_at&#39;)-&gt;nullable();
    
    			$table-&gt;integer(&#39;category_id&#39;);
    			$table-&gt;integer(&#39;target_customer_sex&#39;);
    			$table-&gt;integer(&#39;target_customer_age&#39;);
    
    			$table-&gt;integer(&#39;payment_order&#39;);
    			$table-&gt;integer(&#39;num_comment&#39;);
    			$table-&gt;integer(&#39;num_view&#39;);
    			$table-&gt;string(&#39;num_pop&#39;);
    
    			$table-&gt;integer(&#39;money&#39;);
    			$table-&gt;integer(&#39;point&#39;);
    
    			$table-&gt;datetime(&#39;closed_at&#39;);
    			$table-&gt;timestamps();
    			$table-&gt;softDeletes();
    		});
    	}
    
    	/**
    	 * Reverse the migrations.
    	 *
    	 * @return void
    	 */
    	public function down()
    	{
    		Schema::drop(&#39;orders&#39;);
    	}
    
    }

Laravel migration table field&#39;s type change

First I just created myself a regular expression that will match all unique external library paths in a list of all header files in a project. [I asked a question regarding making that regexp][2] a week ago.

I started meddling around to see how it would behave when asynchronous and when turned into a web worker. For convenience and reliability I created this universal file that runs in all three modes:

    /** Will call result() callback with every match it founds. Asynchronous unless called 
     *  with interval = -1.
     *  Javadoc style comment for Arnold Rimmer and other Java programmers:
     *  
     * @param regex regular expression to match in string
     * @param string guess what
     * @param result callback function that accepts one parameter, string match
     * @param done callback on finish, has no parameters
     * @param interval delay (not actual interval) between finding matches. If -1, 
     *        function  will be blocking
     * @property working false if loop isn&#39;t running, otherwise contains timeout ID
     *           for use with clearTimeout
     * @property done copy of done parameter
     * @throws heavy boulders
    **/
    function processRegex(regex, string, result, done, interval) {
      var m;
      //Please tell me interpreter optimizes this
      interval = typeof interval!=&#39;number&#39;?1:interval;
      //And this
      processRegex.done = done;
      while ((m = regex.exec(string))) {
        Array.prototype.splice.call(m,0,1);
        var path = m.join(&quot;&quot;);
        //It&#39;s good to keep in mind that result() slows down the process
        result(path);
        if (interval&gt;=0) {
          processRegex.working = setTimeout(processRegex, 
                                  interval, regex, string, 
                                  result, done, interval);
          // Comment these out for maximum speed
          processRegex.progress = regex.lastIndex/string.length;
          console.log(&quot;Progress: &quot;+Math.round(processRegex.progress*100)+&quot;%&quot;);
          return;
        }
      }
      
      processRegex.working = false;
      processRegex.done = null;
      if (typeof done==&quot;function&quot;)
        done();
    }
    processRegex.working = false; 

I created a test file, rather than pasting it here I uploaded it on very reliable web hosting: [Demo](http://u8.8u.cz/testing/workers/) - [Test data](http://u8.8u.cz/testing/workers/dependencies.txt).

What I find very surprising is that there is such a significant difference between web worker and browser execution of RegExp. The results I got:

 - Mozilla Firefox
   - &lt;code&gt;**[WORKER]:** Time elapsed:16.860s&lt;/code&gt;
   - &lt;code&gt;**[WORKER-SYNC]:** Time elapsed:16.739s&lt;/code&gt;
   - &lt;code&gt;**[TIMEOUT]:** Time elapsed:5.186s&lt;/code&gt;
   - &lt;code&gt;**[LOOP]:** Time elapsed:5.028s&lt;/code&gt;

You can also see that with my particular regular expression, the difference between a synchronous and an asynchronous loop is insignificant. I tried to use a match list instead of a lookahead expression and the results changed a lot. Here are the changes to the old function:

    function processRegexUnique(regex, string, result, done, interval) {
      var matchList = arguments[5]||[];
      ... same as before ...
      while ((m = regex.exec(string))) {
        ... same as before ...
        if (matchList.indexOf(path)==-1) {
          result(path);
          matchList.push(path);
        }
        if (interval&gt;=0) {
          processRegex.working = setTimeout(processRegex, interval, 
                                   regex, string, result, 
                                   done, interval, matchList);
          ... same as before ...
        }
      }
      ... same as before ...
    }

And the results:

 - Mozilla Firefox
   - &lt;code&gt;**[WORKER]:** Time elapsed:0.062s&lt;/code&gt;
   - &lt;code&gt;**[WORKER-SYNC]:** Time elapsed:0.023s&lt;/code&gt;
   - &lt;code&gt;**[TIMEOUT]:** Time elapsed:12.250s&lt;/code&gt; (note to self: it&#39;s getting weirder every minute)
   - &lt;code&gt;**[LOOP]:** Time elapsed:0.006s&lt;/code&gt;

Can anyone explain such a difference in speed?

  [2]: https://stackoverflow.com/q/32841562/607407

WebWorker calculates slow regexp matches significantly slower (3x) - firefox only

I want to use [`re.MULTILINE`](https://docs.python.org/2/library/re.html#re.MULTILINE) but **NOT** [`re.DOTALL`](https://docs.python.org/2/library/re.html#re.DOTALL), so that I can have a regex that includes both an &quot;any character&quot; wildcard and the normal `.` wildcard that doesn&#39;t match newlines.

Is there a way to do this? What should I use to match any character in those instances that I want to include newlines?

matching any character including newlines in a Python regex subexpression, not globally

Given the following shell script, would someone be so kind as to explain the `grep -Po` regex please?

    #!/bin/bash
    # Issue the request for a bearer token, json is returned
    raw_json=`curl -s -X POST -d &quot;username=name&amp;password=secret&amp;client_id=security-admin-console&quot; http://localhost:8081/auth/realms/master/tokens/grants/access`
    # Strip away all but the &quot;access_token&quot; field&#39;s value using a Python regular expression
    bearerToken=`echo $raw_json | grep -Po &#39;&quot;&#39;&quot;access_token&quot;&#39;&quot;\s*:\s*&quot;\K([^&quot;]*)&#39;`
    echo &quot;The bearer token is:&quot;
    echo $bearerToken

So specifically, I&#39;m interested in understanding the parts of the regex

    grep -Po &#39;&quot;&#39;&quot;access_token&quot;&#39;&quot;\s*:\s*&quot;\K([^&quot;]*)&#39;`

and how it works. Why so many quotes? What is the &quot;K&quot; for? I&#39;ve some experience with grep regex but this confuses me.

This is the actual output of the curl command and the shell script (grep) works as desired returning just the contents of the &quot;access_token&quot; value.

&gt; {&quot;access_token&quot;:&quot;eyJhbGciOiJSandNoThisIsntRealndmbS1yZWFsbSI6eyJyb2xlcyI6WyJtYW5hZ2UtY2xpZW50cyIsInZpZXctcmVhbG0iLCJtYW5hZ2UtZXZlbnRzIiwidmlldy1ldmVudHMiLCJ2aWV3LWFwcGxpY2F0aW9ucyIsInZpZXctdXNlcnMiLCJ2aWV3LWNsaWVudHMiLCJtYW5hZ2UtdXNlcnMiLCJtYW5hZ2UtYXBwbGljYXRpb25zIiwibWFuYWdlLXJlYWxtIl19LCJtYXN0ZXItcmVhbG0iOnsicm9sZXMiOlsibWFuYWdlLWV2ZW50cyIsIm1hbmFnZS1jbGllbnRzIiwidmlldy1yZWFsbSIsInZpZXctZXZlbnRzIiwidmlldy1hcHBsaWNhdGlvbnMiLCJ2aWV3LXVzZXJzIiwidmlldy1jbGllbnRzIiwibWFuYWdlLXJlYWxtIiwibWFuYWdlLXVzZXJzIiwibWFuYWdlLWFwcGxpY2F0aW9ucyJdfX19.fQmQKn-xatvflHPAaxCfrrVow3ynpw0sREho7__jZo2d0g1SwZV7Lf4C26CcweNLlb3wmKHHo63HRz35qRxJ7BXyiZwHgXokvDJj13yuOb6Sirg9z02n6fwGy8Iog30pUvffnDaVnUWHfVL-h_R4-OZNf-_YUK5RcL2DHt0zUXI&quot;,&quot;expires_in&quot;:60,&quot;refresh_expires_in&quot;:1800,&quot;refresh_token&quot;:&quot;eyJhbGciOiJSUzI1NiJ9.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.WeiJOC1jQ52aKgnW8UN2Lv9rJ_yKZiOhijOYKLN2EEOkYF8rvRZsSKbTPFKTIUvjnwy2A7V_N-GhhJH4C-T7F5__QPNofSXbCNyvATj52jGLxk9V0Afvk-Z5QAWi55PJRTC0qteeMRcO2Frw-0KtKYe9o3UcGICJubxhZHsXBLA&quot;,&quot;token_type&quot;:&quot;bearer&quot;,&quot;id_token&quot;:&quot;eyJhbGciOiJSUzI1NiJ9.eyJuYW1lIjoiIiwianRpIjoiMGIyMGI0ODctOTI4OS00YTFhLTgyNmMtM2NiOTg0MDJkMzVkIiwiZXhwIjoxNDQ2ODI4MDU5LCJuYmYiOjAsImlhdCI6MTQ0NjgyNzk5OIwouldhaveToBeNutsUiLCJwcmVmZXJyZWRfdXNlcm5hbWUiOiJhZG1pbiIsImVtYWlsX3ZlcmlmaWVkIjpmYWxzZX0.DmG8Lm4niL1djzNrLsZ2CrsB1ZzUPnR2Nm7IZnrwrmkXsrPxjl6pyXKCWSj6pbk2sgVI8NNFqrGIJmEJ7gkTZWm328VGGpJsmMuJBki0KbqBRKORGQSgkas_34rwzhcTE3Iki8h_YVs2vvNIx_eZSOvIzyEcP3IGHuBoxcR6W3E&quot;,&quot;not-before-policy&quot;:0,&quot;session-state&quot;:&quot;62efc05c-1bf5-4f55-b749-5e0eff94155b&quot;}

----- 

In case anyone finds this post, this is what I ended up using:

    if hash jq 2&gt;/dev/null; then
      # Use the jq command to safely parse json
      bearerToken=$(echo $raw_json | jq -r &#39;.access_token&#39;)
    else
      # Strip away all but the &quot;access_token&quot; field&#39;s value using a perl regular expression
      bearerToken=$(echo $raw_json | grep -Po &#39;&quot;&#39;&quot;access_token&quot;&#39;&quot;\s*:\s*&quot;\K([^&quot;]*)&#39;)
    fi



What does &#39;\K&#39; mean in this regex?

I&#39;m trying to extract text from a set of files on Windows using the Powershell (version 4):

    PS &gt; Select-String -AllMatches -Pattern &lt;mypattern-with(capture)&gt; -Path file.jsp | Format-Table

So far, so good. That gives a nice set of `MatchInfo` objects:

	IgnoreCase                    LineNumber Line                          Filename                      Pattern                       Matches
	----------                    ---------- ----                          --------                      -------                       -------
		True                            30   ...                           file.jsp                      ...                           {...}

Next, I see that the captures are in the matches member, so I take them out:

    PS &gt; Select-String -AllMatches -Pattern &lt;mypattern-with(capture)&gt; -Path file.jsp | ForEach-Object -MemberName Matches | Format-Table

Which gives:

	Groups        Success Captures                 Index     Length Value
	------        ------- --------                 -----     ------ -----
	{...}         True    {...}                    49        47     ...

or as list with `| Format-List`:

	Groups   : {matched text, captured group}
	Success  : True
	Captures : {matched text}
	Index    : 39
	Length   : 33
	Value    : matched text

Here&#39;s where I stop, I have no idea how to go further and obtain a list of *captured group* elements.

I&#39;ve tried adding another `| ForEach-Object -MemberName Groups`, but it seems to return the same as the above.

The closest I get is with `| Select-Object -Property Groups`, which indeed gives me what I&#39;d expect (a list of sets):

	Groups
	------
	{matched text, captured group}
	{matched text, captured group}
	...

But then I&#39;m unable to extract the *captured group* from each of them, I tried with `| Select-Object -Index 1` I get only one of those sets.

---

Update: a possible solution
---------------------------

It seems that by adding `| ForEach-Object { $_.Groups.Groups[1].Value }` I got what I was looking for, but I don&#39;t understand why - so I can&#39;t be sure I would be able to get the right result when extending this method to whole sets of files.

Why is it working?

As a side note, this `| ForEach-Object { $_.Groups[1].Value }` (i.e. without the second `.Groups`) gives the same result.

I&#39;d like to add that, upon further attempts, it seems the command can be shortened by removing the piped `| Select-Object -Property Groups`.

How to get the captured groups from Select-String?

I&#39;m trying to catch if one letter that appears twice in a string using RegEx (or maybe there&#39;s some better ways?), for example my string is:

	ugknbfddgicrmopn

The output would be:

	dd

However, I&#39;ve tried something like:

	re.findall(&#39;[a-z]{2}&#39;, &#39;ugknbfddgicrmopn&#39;)

but in this case, it returns:

	[&#39;ug&#39;, &#39;kn&#39;, &#39;bf&#39;, &#39;dd&#39;, &#39;gi&#39;, &#39;cr&#39;, &#39;mo&#39;, &#39;pn&#39;]   # the except output is `[&#39;dd&#39;]`

--------------

I also have a way to get the expect output:

	&gt;&gt;&gt; l = []
	&gt;&gt;&gt; tmp = None
	&gt;&gt;&gt; for i in &#39;ugknbfddgicrmopn&#39;:
	...     if tmp != i:
	...         tmp = i
	...         continue
	...     l.append(i*2)
	...     
	... 
	&gt;&gt;&gt; l
	[&#39;dd&#39;]
	&gt;&gt;&gt; 

But that&#39;s too complex...

--------------


If it&#39;s `&#39;abbbcppq&#39;`, then only catch:

	abbbcppq
	 ^^  ^^
	 
So the output is:

	[&#39;bb&#39;, &#39;pp&#39;]
	
-----------------

Then, if it&#39;s `&#39;abbbbcppq&#39;`, catch `bb` twice:

	abbbbcppq
	 ^^^^ ^^
	 
So the output is:

	[&#39;bb&#39;, &#39;bb&#39;, &#39;pp&#39;]

Find &quot;one letter that appears twice&quot; in a string

What is the difference between these methods:

1. `find()`
2. `findOrFail()`
3. `first()`
4. `firstOrFail()`
5. `get()`
6. `list()`
7. `toArray()`

I&#39;ve been using them and each one gives a different result and sometimes I need to add `toArray()` at the end of `get()` because my function is expecting an array. Won&#39;t the other methods produce arrays as well?

What is the difference between find(), findOrFail(), first(), firstOrFail(), get(), list(), toArray()

**Description** : I have a table full of tested data. Sometimes, I want to clear it out for new data. I can perform the truncate in the DBMS App like **MySQL WorkBench**, but I&#39;m trying to achieve it within my application instead.

___

**Goal** : to make a button to truncate a table in a database when on click.
___

Here are my steps : 

**1 - Declare a route**

    Route::delete(&#39;visitor/truncate&#39;,array(&#39;as&#39;=&gt;&#39;visitor.truncate&#39;, &#39;uses&#39;=&gt;&#39;VisitorController@truncate&#39;));

___

**2 - Create a `truncate` function in my `VisitorController`**

    public function truncate()
    {
    
        $visitors = Visitor::all();
        $visitors -&gt;truncate();
    
        return View::make(&#39;visitors.index&#39;)
            -&gt;with(&#39;success&#39;, &#39;Truncate Done&#39;);
    }

______

**3 - Create a button on my view** 

     {!! Form::model($visitors, array( &#39;route&#39; =&gt; array(&#39;visitor.truncate&#39;),&#39;method&#39; =&gt; &#39;DELETE&#39;)) !!}
              &lt;button type=&quot;submit&quot;  class=&quot;btn bgm-red btn-float waves-effect waves-effect waves-button waves-float&quot;&gt;&lt;i class=&quot;md md-remove&quot;&gt;&lt;/i&gt;&lt;/button&gt;
          {!! Form::close()!!}

____

**4 - Test** 

When I click on it, it get into my `truncate()` function in my controller, but I keep getting this error 

&gt; Call to undefined method Illuminate\Database\Eloquent\Collection::truncate()


____

Do I need include anything to use `truncate()` ? 

Any hints on that will be much appreciated ! 

Truncate a table in Laravel 5

While running **php artisan migrate**, I got the following error

    

&gt; [Doctrine\DBAL\DBALException]                                                                    
  Unknown database type enum requested, Doctrine\DBAL\Platforms\MySqlPlatform may not support it. 

How to resolve this issue.

Code:

    public function up() {
        Schema::table(&#39;blogs&#39;, function (Blueprint $table) {
            $table-&gt;string(&#39;wordpress_id&#39;)-&gt;nullable();
            $table-&gt;string(&#39;google_blog_id&#39;)-&gt;nullable()-&gt;change();
        });
    }

Laravel 5.1 Unknown database type enum requested

I am trying to get the client&#39;s IP address in Laravel. 

It is easy to get a client&#39;s IP in PHP by using `$_SERVER[&quot;REMOTE_ADDR&quot;]`. It is working fine in core PHP, but when I use the same thing in Laravel,  it returns the server IP instead of the visitor&#39;s IP.


Content Type	Original Author	Original Content on Stackoverflow
Question	Arlind	View Question on Stackoverflow
Solution 1 - Php	Joseph Silber	View Answer on Stackoverflow

Laravel preg_match(): No ending delimiter '/' found

Php Problem Overview

Php Solutions

Solution 1 - Php

Is Async/Await using Task.Run starting a new thread asynchronously?

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