You can use `basename()` and `$_SERVER[&#39;PHP_SELF&#39;]` to get current page file name

    echo basename($_SERVER[&#39;PHP_SELF&#39;]); /* Returns The Current PHP File Name */

`$_SERVER[&quot;PHP_SELF&quot;];` will give you the current filename and its path, but `basename(__FILE__)` should give you the filename that it is called from.

So
    
    if(basename(__FILE__) == &#39;file_name.php&#39;) {
      //Hide
    } else {
      //show
    }

should do it.


In your case you can use `__FILE__` variable !  
It should help.  
It is one of predefined.  
Read more about predefined constants in PHP [http://php.net/manual/en/language.constants.predefined.php][1]


  [1]: http://php.net/manual/en/language.constants.predefined.php

In JavaScript what is the difference between these two examples:

Prerequisite:

	function SomeBaseClass(){
	}

	SomeBaseClass.prototype = {
		doThis : function(){
		},

		doThat : function(){
		}
	}

Inheritance example A using Object.create:

	function MyClass(){
	}

	MyClass.prototype = Object.create(SomeBaseClass.prototype);

Inheritance example B using the new keyword

	function MyClass(){
	}

	MyClass.prototype = new SomeBaseClass();

Both examples seem to do the same thing. When would you chose one over the other?

An additional question:
Consider code in below link (line 15), where a reference to the the function&#39;s own constructor is stored in the prototype. Why is this useful?

https://github.com/mrdoob/three.js/blob/master/src/loaders/ImageLoader.js

Excerpt (if you don&#39;t want to open the link):

    THREE.ImageLoader.prototype = {

        constructor: THREE.ImageLoader
    }


JavaScript inheritance: Object.create vs new

I am using Angular.js for an application that uses hidden trs to simulate a sliding out effect by showing the tr and sliding down the div in the td below. This process worked fantastically using knockout.js when iterating over an array of these rows, because I could use `&lt;!-- ko:foreach --&gt;` around both tr elements.

With angular, `ng-repeat` must be applied to an html element, meaning I cannot seem to repeat these double rows using standard methods. My first response to this was to create a directive to represent these double trs, but that fell short because directive templates must have a single root element, but I have two (`&lt;tr&gt;&lt;/tr&gt;&lt;tr&gt;&lt;/tr&gt;`).

If anyone with experience with ng-repeat and angular who has cracked this can explain how to solve this problem, I would be greatly appreciative.

(I should also note that attaching `ng-repeat` to the tbody is an option, but this produces multiple tbodys, and I am assuming that is bad form for standard HTML, although correct me if I&#39;m wrong)

Angular.js ng-repeat across multiple tr&#39;s

I&#39;ve a file called `demo.php` where I don&#39;t have any GET variables in the URL, so if I want to hide a button if am on this page I can&#39;t use something like this:

    if($_GET[&#39;name&#39;] == &#39;value&#39;) {
      //Hide
    } else {
      //show
    }

So I want something like

    $filename = //get file name
    if($filename == &#39;file_name.php&#39;) {
      //Hide
    } else {
      //show
    }

I don&#39;t want to declare unnecessary GET variables just for doing this...


How to get current PHP page name

I've a file called <code>demo.php</code> where I don't have any GET variables in the URL, so if I want to hide a button if am on this page I can't use something like this:
<pre><code class="hljs language-perl">if($_GET['name'] == 'value') {
 //Hide
} else {
 //show
}
</code></pre>
So I want something like
<pre><code class="hljs language-perl">$filename = //get file name
if($filename == 'file_name.php') {
 //Hide
} else {
 //show
}
</code></pre>
I don't want to declare unnecessary GET variables just for doing this...

Is there a way of doing something like this:

    $test_array = array(&quot;first_key&quot; =&gt; &quot;first_value&quot;, 
                        &quot;second_key&quot; =&gt; &quot;second_value&quot;);

    var_dump(array_map(function($a, $b) { return &quot;$a loves $b&quot;; }, 
             array_keys($test_array), 
             array_values($test_array)));

But instead of calling `array_keys` and `array_values`, directly passing the `$test_array` variable?

The desired output is:

    array(2) {
      [0]=&gt;
      string(27) &quot;first_key loves first_value&quot;
      [1]=&gt;
      string(29) &quot;second_key loves second_value&quot;
    }

PHP&#39;s array_map including keys

I have a form on one page that submits to another page. There, it checks if the input `mail` is filled. If so then do something and if it is not filled, do something else. I don&#39;t understand why it always says that it is set, even if I send an empty form. What is missing or wrong?

`step2.php`:
  
    &lt;form name=&quot;new user&quot; method=&quot;post&quot; action=&quot;step2_check.php&quot;&gt; 
        &lt;input type=&quot;text&quot; name=&quot;mail&quot;/&gt; &lt;br /&gt;
        &lt;input type=&quot;password&quot; name=&quot;password&quot;/&gt;&lt;br /&gt;
        &lt;input type=&quot;submit&quot;  value=&quot;continue&quot;/&gt;
    &lt;/form&gt;

`step2_check.php`:

    if (isset($_POST[&quot;mail&quot;])) {
    	echo &quot;Yes, mail is set&quot;;	
    } else {	
    	echo &quot;N0, mail is not set&quot;;
    }

If isset $_POST

When using

    ini_get(&quot;upload_max_filesize&quot;);

it actually gives you the string specified in the php.ini file.

It is not good to use this value as a reference for the maximum upload size because

 - it is possible to use so-called [shorthandbytes](http://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes) like `1M` and so on which needs alot of additional parsing
 - when upload_max_filesize is for example `0.25M`, it actually is ZERO, making the parsing of the value much harder once again
 - also, if the value contains any spaces like it is interpreted as ZERO by php, while it shows the value without spaces when using `ini_get`

So, is there any way to get the value actually being used by PHP, besides the one reported by `ini_get`, or what is the best way to determinate it?

PHP get actual maximum upload size

I just need help on this PHP error which I do not quite understand:

&gt; Fatal error: Cannot pass parameter 2 by reference in /web/stud/openup/inactivatesession.php on line 13

    &lt;?php

    error_reporting(E_ALL);

    include(&#39;connect.php&#39;);

    $createDate = mktime(0,0,0,09,05,date(&quot;Y&quot;));
    $selectedDate =  date(&#39;d-m-Y&#39;, ($createDate));

    $sql = &quot;UPDATE Session SET Active = ? WHERE DATE_FORMAT(SessionDate,&#39;%Y-%m-%d&#39; ) &lt;= ?&quot;;										    
    $update = $mysqli-&gt;prepare($sql);
    $update-&gt;bind_param(&quot;is&quot;, 0, $selectedDate);  //LINE 13
    $update-&gt;execute();

    ?&gt;

What does this error mean? How can this error be fixed?

PHP error: &quot;Cannot pass parameter 2 by reference&quot;

I&#39;m trying to convert an array of products into a CSV file, but it doesn&#39;t seem to be going to plan. The CSV file is one long line, here is my code: 

    for($i=0;$i&lt;count($prods);$i++) {
	$sql = &quot;SELECT * FROM products WHERE id = &#39;&quot;.$prods[$i].&quot;&#39;&quot;;
	$result = $mysqli-&gt;query($sql);
	$info = $result-&gt;fetch_array();	
    }

    $header = &#39;&#39;;

    for($i=0;$i&lt;count($info);$i++)  
      {
    	$row = $info[$i];
	
        $line = &#39;&#39;;
        for($b=0;$b&lt;count($row);$b++)
        { 
	    $value = $row[$b];                                      
            if ( ( !isset( $value ) ) || ( $value == &quot;&quot; ) )
            {
                $value = &quot;\t&quot;;
            }
            else
            {
                $value = str_replace( &#39;&quot;&#39; , &#39;&quot;&quot;&#39; , $value );
                $value = &#39;&quot;&#39; . $value . &#39;&quot;&#39; . &quot;\t&quot;;
            }
             $line .= $value;
            }
        $data .= trim( $line ) . &quot;\n&quot;;
    }
    $data = str_replace( &quot;\r&quot; , &quot;&quot; , $data );

    if ( $data == &quot;&quot; )
    {
    $data = &quot;\n(0) Records Found!\n&quot;;                        
    }

    header(&quot;Content-type: application/octet-stream&quot;);
    header(&quot;Content-Disposition: attachment; filename=your_desired_name.xls&quot;);
    header(&quot;Pragma: no-cache&quot;);
    header(&quot;Expires: 0&quot;);

    array_to_CSV($data);


    function array_to_CSV($data)
        {
            $outstream = fopen(&quot;php://output&quot;, &#39;r+&#39;);
            fputcsv($outstream, $data, &#39;,&#39;, &#39;&quot;&#39;);
            rewind($outstream);
            $csv = fgets($outstream);
            fclose($outstream);
            return $csv;
        }


Also, the header doesn&#39;t force a download. I&#39;ve been copy and pasting the output and saving as .csv 

## EDIT 

PROBLEM RESOLVED: 

If anyone else was looking for the same thing, found a better way of doing it:

    $num = 0;
    $sql = &quot;SELECT id, name, description FROM products&quot;;
    if($result = $mysqli-&gt;query($sql)) {
	     while($p = $result-&gt;fetch_array()) {
		     $prod[$num][&#39;id&#39;]          = $p[&#39;id&#39;];
		     $prod[$num][&#39;name&#39;]        = $p[&#39;name&#39;];
		     $prod[$num][&#39;description&#39;] = $p[&#39;description&#39;];
		     $num++;		
	    }
     }
    $output = fopen(&quot;php://output&quot;,&#39;w&#39;) or die(&quot;Can&#39;t open php://output&quot;);
    header(&quot;Content-Type:application/csv&quot;); 
    header(&quot;Content-Disposition:attachment;filename=pressurecsv.csv&quot;); 
    fputcsv($output, array(&#39;id&#39;,&#39;name&#39;,&#39;description&#39;));
    foreach($prod as $product) {
	    fputcsv($output, $product);
    }
    fclose($output) or die(&quot;Can&#39;t close php://output&quot;);


Content Type	Original Author	Original Content on Stackoverflow
Question	Random Guy	View Question on Stackoverflow
Solution 1 - Php	Mr. Alien	View Answer on Stackoverflow
Solution 2 - Php	Amykate	View Answer on Stackoverflow
Solution 3 - Php	Bogdan Burym	View Answer on Stackoverflow

How to get current PHP page name

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Solution 3 - Php

Angular.js ng-repeat across multiple tr's

JavaScript inheritance: Object.create vs new

Attributions