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PHP: PHP Class Example

October 8, 2016 //
0
  • Follow the link.
  • This link contains some code error in php tag.
  • go to the link to download the code from me.
  • Look the link to get an overview of PHP class.
  • The link to get an overview of PHP class.
  • Happy coding.
Categories Web Development

PHP: PHP programm to calculate sum of two numbers

October 7, 2016 //
0

PHP program to calculate sum of two numbers:

  • <?php
    if(isset($_POST[‘form1’])) {
    $F_No = $_POST[‘FirstNumber’];
    $S_No = $_POST[‘SecondNumber’];$msg = “”;
    $total = 0;
    $valid_Flag=1;

    if(empty($F_No)){
    $msg .= “Please give first value<br>”;
    $valid_Flag=0;
    }
    else
    {
    $total = $F_No;
    }

    if(empty($S_No)){
    $msg .= “Please give second value<br>”;
    $valid_Flag=0;
    }
    else
    {
    $total =$total + $S_No;
    }

    if($valid_Flag ==0 ){
    echo ”

    “.$msg.”

    “;
    }
    else
    echo $total;
    }
    ?>

    <!DOCTYPE HTML>
    <html lang=”en-US”>
    <head>
    <meta charset=”UTF-8″>
    <title>Catch the submit button value to the same page</title>
    <style type=”text/css”>
    .error {
    color: red;
    }
    </style>

    </head>
    <body>

    <form action=”index.php” method=”post”>
    <table>
    <tr>
    <td>First Number: </td>
    <td><input type=”text” name=”FirstNumber”/></td>
    <!–<td><input type=”text” name=”FirstNumber” placeholder=”Give First Number” value=”1″/></td>–>
    </tr>
    <tr>
    <td>Second Number: </td>
    <td><input type=”text” name=”SecondNumber”/></td>
    <!–<td><input type=”text” name=”SecondNumber” placeholder=”Give Second Number” value=”1″/></td>–>
    </tr>

    <tr>
    <td><input type=”submit” value=”Add” name=”form1″/></td>
    </tr>
    </table>
    </form>
    </body>
    </html>

  • don’t use any placeholder in the input element.
Categories Web Development

PHP: PHP String Operators (concatenation operator)

October 7, 2016 //
0

PHP has two operators that are specially designed for strings.

  1. The first is the concatenation operator (‘.’), which returns the concatenation of its right and left arguments.
    • example:
    • <!DOCTYPE html>
      <html>
      <body><?php
      $txt1 = “Hello”;
      $txt2 = ” world!”;
      echo $txt1 . $txt2;
      ?></body>
      </html>
  2. The second is the concatenating assignment operator (‘.=‘), which appends the argument on the right side to the argument on the left side. (append = add something to the end)
    • example:
    • <!DOCTYPE html>
      <html>
      <body><?php
      $txt1 = “Hello”;
      $txt1 .= ” world!”;echo $txt1;
      ?></body>
      </html>
    • Appends world! to $txt1
Categories Web Development

PHP: HTML inside PHP and vice versa

October 7, 2016 //
0

There are two ways to use HTML on your PHP page.

  • The first way is to put the HTML outside of your PHP tags.
  • The second way to use HTML with PHP is by using PRINT or ECHO. By using this method you can include the HTML inside of the PHP tags. This is a nice quick method if you only have a line or so to do.
  • Create page with .php extension.
Categories Web Development

HTML: form : input element fields

October 7, 2016 //
0

html form is the collection of elements. That is html form is a container that contains several html elements. For example:

  1. input element (The most important form element is the <input> element.)
    • Example: <input type=”text” name=”fname” value=”John”>
    • No closing tag.
  2. option element (defines an option that can be selected.)
    • Helps to create drop-down list inside an HTML form.
    • <option value=”volvo”>banana</option>
    • Has closing tag.
  3. select element (defines a drop-down list)
  4. textarea element (defines a multi-line input field )
  5. button element (defines a clickable button)
    • <button name=”subject” type=”submit” value=”fav_HTML”>HTML</button>
    • Has closing tag.

HTML5 added the following form elements:

  1. datalist element (specifies a list of pre-defined options for an <input> element.)
  2. keygen element
  3. output element (represents the result of a calculation)

Attributes provide additional information about HTML elements.

HTML Attributes:

  1. All HTML elements can have attributes
  2. Attributes provide additional information about an element
  3. Attributes are always specified in the start tag
  4. Attributes usually come in name/value pairs like: name=”value”

value attribute:

  1. For button, input and option elements, the value attribute specifies the value of the element.
  2. For li elements, the value attribute sets the value of an ordered list item. The following list items will increment from that number.
  3. For progress elements, the value attribute specifies how much of the task has been completed.
  4. For param elements, the value attribute specifies the value of a <param> element.

The value attribute specifies the value(or initial value for text box) for an input field/element.

The value attribute can be used on the following elements:

  1. button
  2. input
  3. li
  4. option
  5. progress
  6. param
  1. Example: (Button)
    1. <form action=”demo_form.asp” method=”get”>
      Choose your favorite subject:
      <button name=”subject” type=”submit” value=”fav_HTML”>HTML</button>
      <button name=”subject” type=”submit” value=”fav_CSS”>CSS</button>
      </form>
    2. Two buttons with equal names, that submit different values when clicked
    3. pass the value of the button which is submitted to the server.
  2.  Example: (Input)
    1. <form action=”demo_form.asp”>
      First name: <input type=”text” name=”fname” value=”John”><br>
      Last name: <input type=”text” name=”lname” value=”Doe”><br>
      <input type=”submit” value=”Submit form”>
      </form>
    2. First textbox show John and Second textbox Doe

Id attribute:

  1. Valid on any element except <base>, <html>, <head>, <meta>, <param>, <script>, <style>, <title>
  2. Each Id should be unique in the page
  3. Is referenced in CSS with # sign
  4. Is referenced in JS with getElementById(), and jQuery by $(#<id>)
  5. Must begin with a letter
  6. case insensitive
  7. But in HTML 5 it is valid for any element.
  8. The id attribute specifies a unique id for an HTML element (the value must be unique within the HTML document).
  9. Must not contain any space characters.
  10. In HTML, all values are case-insensitive
  11. Must contain at least one character.
  12. Specifies a unique id for the element.
    • Use the id attribute to link to an element with a specified id within a page.
    • Example:
      <html>
      <body>                                                                                                                                            <h2><a id=”top”>Some heading</a></h2>
      <p>Lots of text….</p>
      <a href=”#top”>Go to top</a>                                                                                                        </body>
      </html>

Name attribute:

  1. Valid only on <a>, <form>, <iframe>, <img>, <map>, <input>, <select>, <textarea>
  2. Name does not have to be unique, and can be used to group elements together such as radio buttons & checkboxes.
  3. Used on form elements to submit information. Only input tags with a name attribute are submitted to the server
  4. The name attribute specifies the name of an <input> element..
  5. The name attribute is used to reference form data after a form is submitted.
  6. Only form elements with a name attribute will have their values passed when submitting a form.
  7. In HTML 5 Not valid on <form> anymore
    • Example:
    • <form action=”demo_form.asp”>
      Name: <input type=”text” name=”fullname”><br>
      Email: <input type=”text” name=”email”><br>
      <input type=”submit” value=”Submit”>
      </form>

for attribute:

  1. The for attribute specifies which form element a label is bound to.
  2. The for attribute is used in labels. It refers to the id of the element that label is associated.
    • Example
    • <html>
      <form>
      <label for=”firstname”> First name:</label><br>
      <input type=”text” id=”firstname” name=”firstname”><br>
      <label for=”last_name”> Last Name:</label><br>
      <input type=”text” id=”last_name” name=”lastname”>
      </form>
      </html>
  3. Now when the user clicks with the mouse on the Firstname: text the browser will automatically put the focus in the corresponding input field.
  4. The id  field value and for field value must be same.
Categories Web Development

HTML: comment

October 7, 2016 //
0

<!–This is a comment. Comments are not displayed in the browser–>

<!–comment goes here–>

Categories Web Development

Inatall laravel 5 in bangla

August 15, 2016 //
0

Categories Web Development

padding and margin is CSS

March 12, 2016 //
2
  • padding is the space inside of an element that hold the content of an element away from its edge.
    padding-top: padding: 10px 20px 15px 10px;
    padding-right: padding: 10px 20px(left & right) 15px;
    padding-bottom: padding: 10px(top & bottom) 20px(left & right);
    padding-left: padding: 10px; applies to all sides
  • most element don’t have any padding if we don’t explicitly declare.
  • by default block level element such as <p> takes the full width of its parent
  • now if we declare the padding then it takes space from inside of the content. 
  • vertical margin collapse means that from two elements(one stack to other) only one’s margin applies and which one is larger that will be applied.  
  • please follow along the video
Categories Web Development

Understanding the CSS box model

March 11, 2016 //
0

Box model

  • Every single element on your web page is considered to be in a rectangular box.

    The properties of this box is:

  • Margin: Transparent or invisible but exist. Margin represents the space around an element & it is used to define the space between the page element. Margin are not used to calculate the final width of an element.
  • Border: Visible. Most element don’t have any border. It has three properties
                                           border-width:
                                           border-color:
                                           border-style:
  • Padding: by default transparent(depends on user). space added inside the border. Its value is used to calculate overall width and height of an element
  • Width: content width. Inside of the element
    height: content height. 
    These properties not only defines the size of the element but also defines how it relates with surroundings.
  • Content: the writings inside the box
    Element: related with the box.

see the video:

Categories Web Development

Auto Completion of Tag in HTML

February 9, 2016 //
0

I am going to show you with an example

  1. first write body for body tag
  2. Then give < on the left side of body tag i.e <body
  3. Then give > on the left side of body tag i.e <body>
  4. Then u will see the auto-completion of </body>

This i have practice in NotePad++ editor. If u like this then please share this article, Thanks.

Categories Web Development
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