Web Programing for Beginners

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PHP - Print the Processed data

It is the way to see the processed php data by sending it to the browser as an out put. You can display the contents within the browser to see the users. There are several ways allows in php to send out put to the browser. I'm discussed here most important & common methods here.

• echo() statement
  This is the most common out put generation method in php. echo() statement accept multiple arguments.
  syntax:
  echo (string arg1[, string arg2, ...]);
  

PHP - Arrays

There are two types of array namely,

• Single Dimensional Array
• Multi Dimensional Array 

Arrays can store multiple information in a single variable. If you are using variables to store 4 values then you need to the followings.
  $bookName = "Sample Book";
  $bookAuthor = "Author\'s Name";
  $bookPublished = "April 02, 2013"; 
  $bookPublisher = "Sample Book Publisher";
But you can store above all values to a single array. 

• Single Dimensional Arrays
  Ex:
  $book = array(
       "Sample Book",
       "Author's Name",
       "April 02, 2013",
       "Sample Book Publisher"
       ) //use a book array to store above values
  echo "Book Name : " . $book[0]; // Print 1st element of the array
  

PHP - Numbers

There are two types of Numbers can be declared with php.

• Whole Numbers
  
  Integer data type uses to store positive or negative whole Numbers (without decimal points). It is not required to define integers because php is a loosely typed language. You are define a whole number without double quotes then it automatically evaluate as an integer value. But you can force the value store as integer by using casting. 
  Ex:
  1, -50
  $num = 50 // Numbers are define without double or single quotes
  $num = (int) 50 // This is a casting example. Here force to store the value as integer.
  $num = (int) "5years" // Taken the value as 5
  $num = (int) "age10" // Taken the value as 0 


• Real Numbers
  Double and Float data type uses to store positive or negative whole Numbers (with decimal points). 
  Ex:
  15.3325, -5.586240
  $num = 50.5589// Real Numbers are define without double or single quotes
  $num = (double) 50.569 // This is a casting example. Here force to store the value as real number.
  $num = (double) "5.85Km" // Taken the value as 5.85
  $num = (double) "age10.6" // Taken the value as 0
  $num = (float) "10.53yards" // Taken the value as10.53

PHP - String

String Variables are used to store set of characters enclosed with single (') or double (") quotes. In this post covering general operations and operations of string.
Ex:
  <?php
      $str = "PHP programing with String"; // Assign characters to string variable
      echo $str; // Print the string
  ?>

Out put: 
PHP programing with String

• String Concatenation
  You can put two or more strings together with (.) operator.
  Ex: 
    <?php
      $str1 = "PHP Programing";
      $str2 = " with String";
      echo $str1 . $str2;
    ?>
  Out put: 
  PHP programing with String