Manjeet Kashyap Blog: July 2017

Sunday, 30 July 2017

Use htmlentities with the correct characterset option

$value = htmlentities($this->value , ENT_QUOTES , 'UTF-8');

Difference Between Comparison Operators in php.

If you use strpos() to determine whether a substring exists within a string (it returns FALSE

<?php
 
$authors = 'Chris & Sean';
 
if (strpos($authors, 'Chris')) {
    echo 'Chris is an author.';
} else {
    echo 'Chris is not an author.';
}
 
?>

Friday, 28 July 2017

Logical Operators Example

   <?php
         $a = 42;
         $b = 0;
         
         if( $a && $b ) {
            echo "TEST1 : Both a and b are true<br/>";
         }else{
            echo "TEST1 : Either a or b is false<br/>";
         }
         
         if( $a and $b ) {
            echo "TEST2 : Both a and b are true<br/>";
         }else{
            echo "TEST2 : Either a or b is false<br/>";
         }
         
         if( $a || $b ) {
            echo "TEST3 : Either a or b is true<br/>";
         }else{
            echo "TEST3 : Both a and b are false<br/>";
         }
         
         if( $a or $b ) {
            echo "TEST4 : Either a or b is true<br/>";
         }else {
            echo "TEST4 : Both a and b are false<br/>";
         }
         
         $a = 10;
         $b = 20;
         
         if( $a ) {
            echo "TEST5 : a is true <br/>";
         }else {
            echo "TEST5 : a  is false<br/>";
         }
         
         if( $b ) {
            echo "TEST6 : b is true <br/>";
         }else {
            echo "TEST6 : b  is false<br/>";
         }
         
         if( !$a ) {
            echo "TEST7 : a is true <br/>";
         }else {
            echo "TEST7 : a  is false<br/>";
         }
         
         if( !$b ) {
            echo "TEST8 : b is true <br/>";
         }else {
            echo "TEST8 : b  is false<br/>";
         }
      ?>

This will produce the following result −

TEST1 : Either a or b is false
TEST2 : Either a or b is false
TEST3 : Either a or b is true
TEST4 : Either a or b is true
TEST5 : a is true
TEST6 : b is true
TEST7 : a is false
TEST8 : b is false

How to print following number table:

How to print following number table:

<table width="270px" cellspacing="0px" cellpadding="0px" border="1px">



<?php

//$a = 1;

for($row=1;$row<=10;$row++)

{

echo "<tr>";

for($col=1;$col<=10;$col++)

{

echo "<td>" .($col * $row). "</td>";

}

//$a++;

echo "</tr>";

}

?>

</table>

Write a program to make a chess:

Write a program to make a chess:

Program to print below format...

(1) Program to print below format
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * * * * * * * *

<?php

   $rows=5; // number of row
      for($i=1;$i<=$rows;$i++)
        {
 
           for($j=1;$j<=$i;$j++)
              {
                echo "*";
              }
            echo "<br />";
        }

?>

(2 ) Write a program to print the below format :
1 5 9
2 6 10
3 7 11
4 8 12

<?php

for($i=1;$i<=4;$i++)
{
$i1=$i+4;
$i2=$i+8;
echo $i." ".$i1." ".$i2;
echo "<br />";
}

?>

(3) Write a program for this Pattern:

*****
*      *
*      *
*      *
*****

<?php
for($i = 1; $i<=5; $i++){
for($j = 1; $j<=5; $j++){
if($i == 1 || $i == 5){
echo "*";
}
else if($j == 1 || $j == 5){
echo "*";
}
else {
echo "  ";
}

}
echo "<br/>";
}
?>

Program to print below format..

Program to print below format.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7
1 2 3 4 5 6
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

<?php
   $rows=5;  // number of row
   for($i=$rows;$i>=1;--$i)
     {
         for($j=1;$j<=$i;++$j)
         {
            echo $j;
         }
     echo "<br />";
     }
 ?>

Program to print the below format.

Program to print the below format
* * * * * * * * * * * * * * *
* * * * * * * * * * * * *
* * * * * * * * * * *
* * * * * * * * *
* * * * * * *
* * * * *
* * *
*

<?php

   $rows=5;  // number of row enter.
   for($i=$rows;$i>=1;--$i)
     {
         for($space=0;$space<$rows-$i;++$space)
            echo "  ";
         for($j=$i;$j<=2*$i-1;++$j)
           echo "* ";
         for($j=0;$j<$i-1;++$j)
             echo "* ";
         echo "<br />";
     }

Program to find year is LEAP year or not.

<?php
    $year=2017;
    if($year%4==0)
          {
            $leap="It is a leap year";
          }
      else
         {
           $leap="It is not a leap year";
        }
 ?>

Write a program to print Fibonacci series

Write a program to print Fibonacci series

<?php


$fibo=array(0,1);

$num=4;

     for($i=2;$i<=$num-1;$i++)

{

       $fibo[$i]=$fibo[$i-1]+$fibo[$i-2];

      }

?>

To check whether a number is Prime or not.

<?php

   $check=0;
   $num=$_POST['number'];
   for($i=2;$i<=($num/2);$i++)
     { 
       if($num%$i==0)
         {
          $check++;
          if($check==1)
          {
             break;
          }
         }
     }

Write a program to print Reverse in php

<?php
         $rev=0;
         $num=4;

          while($num>=1)
                {
                  $re=$num%10;
                  $rev=$rev*10+$re;
                  $num=$num/10;
                 }

?>

Write a program to find whether a number is Armstrong or not in php.

<?php
if(isset($_POST['number']) && $_POST['number']!='')
    {

        $number = $_POST[ 'number' ]; // get the number entered by user

        $temp = $number;
        $sum = 0;

        while($temp != 0 )
        {
            $remainder   = $temp % 10; //find reminder
            $sum         = $sum + ( $remainder * $remainder * $remainder );
            $temp        = $temp / 10;

   }
        if( $number == $sum )
        {
            echo "$number is an Armstrong Number";
        }else
        {
            echo "$number is not an Armstrong Number";
        }
    }
?>

Write a program in PHP to print Fibonacci series . 0, 1, 1, 2, 3, 5, 8, 13, 21, 34

<?PHP
   $first = 0;
   $second = 1;
   echo $first.' ,';
   echo $second.' ,';

for($limit=0;$limit<10;$limit++)
   {
   $third = $first+$second;
     echo $third.' ,';;
     $first = $second;
     $second = $third;

   }
?>

Write a program to print Factorial number in php.

<?php

$num = 4;
$factorial = 1;
for ($x=$num; $x>=1; $x--)
{
$factorial = $factorial * $x;
}
echo "Factorial of $num is $factorial";

?>

Output
Factorial of 4 is 24

Friday, 21 July 2017

Display latest comments in wordpress template.

Display latest comments for each post in WordPress

<?php
$commentArr = array_reverse(get_approved_comments($wp_query->post->ID));
$count = 1; // number of comments
if ($commentArr) { ?>
    <h3><?php commentsNum('0 comment', '1 comment', '% comments'); ?></h3>
    <ul>
    <?php foreach ($commentArr as $comment) {
        if ($count++ <= 2) { ?>
        <li><?php comment_author_link(); ?>: <?php comment_excerpt(); ?></li>
        <?php }
    } ?>
    </ul>
<?php } else {
    echo '<p>No Comments..</p>';
} ?>

Thursday, 20 July 2017

How to add facebook fun page in Blog and page.

Click "Add Widget" to post a badge on your Blogger site that links to your Facebook account.

Step 2: Place this code wherever you want the plugin to appear on your page.

<iframe src="https://www.facebook.com/plugins/follow.php?href=https%3A%2F%2Fwww.facebook.com%2Fmanjeetkashyapsaharanpur&width=250&height=80&layout=standard&size=large&show_faces=true&appId" width="250" height="80" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true"></iframe>

Change facebook page name.

Monday, 17 July 2017

How to hide admin bar in wordpress frontend.

If you would rather remove the toolbar with code, just drop the following snippet into your functions.php file:

add_filter('show_admin_bar', '__return_false');

What is Practice in technical language.

When I'm saying "Practice", what does it mean? I would say:

    Practice is a habit.

    Practice is a routine.

    Practice does not need to remember.

    Practice comes by practicing.

    Practice needs dedication and commitment.

Thursday, 13 July 2017

How to page reload in ajax and jquery in php

<div id="manjeet"></div>

<script type='text/javascript'>

function autoRefresh_div()

{

$('#manjeet').load('get_data.php');// a function which will load data from other file after x seconds

}

setInterval('autoRefresh_div()', 5000);

</script>

Thursday, 6 July 2017

How to browser close and tab close event in JavaScript

Following javascript code you could use to detect browser close and tab close event.

window.onbeforeunload = function () {
    alert("Do you really want to close?");
};

How to check internet connection using javascript

Here is the simple javascript function for getting internet status working or not..

<script>
function checkInternetCon() {
var status = navigator.onLine;
if (status) {
alert("Yes!! Working");
} else {
alert("Sad!! Not Working ");
}
}</script>

Call above function on button onclick event.

<button onclick="checkInternetCon()">Check Internet Connection</button>

You can also use setInterval method in javascript

setInterval(function(){ 
var status = navigator.onLine;
 if (status) {
 console.log('Working..');
 } else {
  console.log('Not Working..');
 }
}, 5000);

Wednesday, 5 July 2017

How to crop image in php.

 Learn more about php GD Library http://php.net/manual/en/book.image.php

 create index.php file.

<?php
# Note: Install GD libraries 
$filename = 'image.jpg'; //orignal file 
$newFilename = 'newImage.png'; // New file after modification 
 
list($current_width, $current_height) = getimagesize($filename);
$left = 0; //crop left margin
$top = 0;//crop right margin
$cropWidth = 1056; 
$cropHeight = 400;
$canvas = imagecreatetruecolor($cropWidth, $cropHeight);
$currentImage = imagecreatefromjpeg($filename);
imagecopy($canvas, $currentImage, 0, 0, $left, $top, $currentWidth, $currentHeight);
imagejpeg($canvas, $newFilename, 100);
?>

Create pagination using corephp and phpmysql.

First of all create your Mysql database and table

CREATE TABLE IF NOT EXISTS `posts` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `title` VARCHAR(200) NOT NULL,
  `description` text NOT NULL,
  `created` datetime NOT NULL,
  `updated` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;

 create show.php file.

<?php
$hostname = 'localhost'; // your mysql hostname
$username = 'root';   // Your mysql db username
$password = 'root';   // You mysql db password
$database = 'demo';       // mysql db name
$con = mysqli_connect($hostname, $username, $password, $database);
 
    if (isset($_GET["page"])) { 
      $page  = $_GET["page"]; 
    } else { 
      $page=1; 
    };
$recordsPerPage=20; 
$start = ($page-1) * $recordsPerPage; 
$query = "SELECT * FROM posts LIMIT $start, $recordsPerPage"; 
$result = mysqli_query($con, $query);
 
echo "<table><tr><th>Title</th><th>Description</th></tr>";
while ($row = mysqli_fetch_assoc($result)) { 
            echo "<tr>
            <td>".$row['title']."</td><td>".$row['description']."</td></tr>";            
}
echo "</table>";
 
$query = "SELECT * FROM posts"; 
$result = mysqli_query($con, $query); //run the query
$totalRecords = mysqli_num_rows($result);  //count number of records
$totalPages = ceil($totalRecords / $recordsPerPage); 
 
echo "<a href='show.php?page=1'>".'|<'."</a> "; // Go to 1st page  
 
for ($num=1; $num<=$totalPages; $num++) { 
            echo "<a href='show.php?page=".$num."'>".$num."</a> "; 
}; 
echo "<a href='show.php?page=$totalPages'>".'>|'."</a> "; // Go to last page
?>

GET HTML (Parser) Using PHP

Download html parser class file from http://sourceforge.net/projects/simplehtmldom/files/

And create your project directory and create file index.php

 index.php

<?php
error_reporting(0);
// call parser library
include('lib/simple_html_dom.php');
$html = file_get_html('http://webdeskers.com');
$posts = array();
foreach($html->find('tr') as $e)
{
  $data = array();
  foreach($e->find('td') as $d)
  {
   $data[] =  $d->innertext;
  }
  array_push($posts, $data);
}
 
echo "<pre>";
print_r($posts);
?>