How To Do Everything | How To Tutorials » PHP http://howtoideas.net How To Ideas Wed, 25 Apr 2012 21:22:25 +0000 en hourly 1 How to Embed PHP using Different Tag Types http://howtoideas.net/how-to-embed-php-using-different-tag-types http://howtoideas.net/how-to-embed-php-using-different-tag-types#comments Sun, 17 Jul 2011 07:19:54 +0000 Sarbjit Singh http://howtoideas.net/how-to-embed-php-using-different-tag-types Read more »]]> In PHP language, there are some different types of tags to start and end the PHP script. There are four delimitation variants, all of which are introduced below:

  1. Default Syntax: The default delimiter syntax opens with “<?php” and ends with “?>”

    <?php
        echo "Text using the default syntax of tags.";
    ?>

  2. Short-Tags: These tags are known as short-tags because you are typing less for same result. The difference is you should enable the “short_open_tag” property of your PHP settings on your server. Although short-tags are convenient to use but they clash with the XML and XHTML syntax. Therefore, avoid short-tags in your programming for batter result.

    <? 
        echo "Text using the short-tags.";
    ?>

  3. Script: You can use script tags to insert PHP code. To use this type use Script tags in your page.

    <script language="php">
        echo "Text using Script tags.";
    </script>

  4. ASP Style: If you’re from an ASP background then prefer to continue using this escape syntax, PHP supports it. But this syntax is removed in PHP 6.

    <%
        echo "Text using ASP type tags.";
    %>

Enjoy…

]]> http://howtoideas.net/how-to-embed-php-using-different-tag-types/feed 0 How to Write Your First PHP Code http://howtoideas.net/how-to-write-your-first-php-code http://howtoideas.net/how-to-write-your-first-php-code#comments Sat, 16 Jul 2011 13:47:32 +0000 Sarbjit Singh http://howtoideas.net/how-to-write-your-first-php-code Read more »]]> Under the label PHP you can learn basics, intermediate and advanced programming in PHP. If you are the beginner lets start with your first script in PHP.


<html>
<head>
    <title>First PHP Script</title>
</head>
<body>
    <?php
        echo "This is the text using PHP.";
    ?>
</body>
</html>

In the above example there is a basic structure of HTML. In the body tag I used PHP code. To start the PHP code there is tag which specifies the starting and ending of PHP code. “<?php” denotes the starting of PHP tag and “?>” denotes the ending tag. In between there is a function “echo” it prints the value passed in it. “echo” is not actually a function we can pass value in double quotes also like I did in this example. It can also be called as:


<?php
    echo ("This is the text using PHP.");
?>

Both examples results the same thing. If you want to pass multiple parameters in the “echo” function.Then use the following code:


<?php
    echo "PHP ", "is ", "a ", "great ", "language.";
?>

Enjoy…

]]> http://howtoideas.net/how-to-write-your-first-php-code/feed 0 How to validate date in PHP http://howtoideas.net/how-to-validate-date-in-php http://howtoideas.net/how-to-validate-date-in-php#comments Wed, 13 Jul 2011 11:16:57 +0000 Sarbjit Singh http://howtoideas.net/how-to-validate-date-and-time-in-php Read more »]]> Sometimes in the forms you want to validate the date via PHP functions to check whether date was in correct format or not. If you didn’t validate it, it may cause some issues in your code. To prevent such errors you should check the date format in PHP. To perform that use the checkdate() function in PHP. This function accomplishes the task of validating dates quite nicely. returns TRUE if supplied date is valid otherwise returns FALSE. Its prototype is:

 

Boolean checkdate ( int month, int day, int year)

 

For example:

 

//checkdate() will return TRUE because 2012 is a leap year thus date is valid.
echo “February 29,2012: is ” . (checkdate(02,29,2012)?’valid’:'invalid’) . ” date”;

//checkdate() will return FALSE because 2011 is not a leap year thus date is invalid.
echo “February 29,2011: is ” . (checkdate(02,29,2011)?’valid’:'invalid’) . ” date”;

 

Enjoy…

]]> http://howtoideas.net/how-to-validate-date-in-php/feed 0 How to Declare Dynamic Function/Constructor in php http://howtoideas.net/how-to-declare-dynamic-functionconstructor-in-php http://howtoideas.net/how-to-declare-dynamic-functionconstructor-in-php#comments Sat, 02 Jul 2011 12:22:57 +0000 Sarbjit Singh http://howtoideas.net/how-to-declare-dynamic-functionconstructor-in-php Read more »]]> In many cases you wanted to declare dynamic function which allows you to pass multiple parameters. Here is the example to demonstrate the dynamic function or constructor. Take an example of database connection class in which you want to pass 3 or 4 parameters to constructor.

<?php
class db_connection{

//To store the databse name
private $_database = "";

//To store the connection values
private $_mysqli_link;

//Declaration of dynamic constructor
public function __construct(){
//If number of arguments are 3
// Host + Username + Password
if(func_num_args() == 3) {
$this->_mysqli_link = mysqli_connect(func_get_arg(0),func_get_arg(1),func_get_arg(2)) or die("Database connection failed.<br/>");
}

//If number of arguments are 4
// Host + Username + Password + Database Name
elseif(func_num_args() == 4) {
$this->_database = func_get_arg(3);
$this->_mysqli_link = mysqli_connect(func_get_arg(0),func_get_arg(1),func_get_arg(2),func_get_arg(3)) or die("Database connection failed.<br/>");
}

// If any other syntax is used to instantiate the class
else {
die("Connection declaration syntax is invalid");
}
}

// Function to select or change the database name
public function db_select($database){
mysqli_select_db( $this->_mysqli_link,$database ) or die("Database selection failed.");
$this->_database = $database;
}
}
?>

You can download the source code of this example here.

Enjoy

]]> http://howtoideas.net/how-to-declare-dynamic-functionconstructor-in-php/feed 0 How to Connect a Database in MySQL Using PHP http://howtoideas.net/how-to-connect-a-database-in-mysql-using-php http://howtoideas.net/how-to-connect-a-database-in-mysql-using-php#comments Thu, 02 Jun 2011 20:43:19 +0000 Sarbjit Singh http://howtoideas.net/how-to-connect-a-database-in-mysql-using-php Read more »]]> This code will allow you to connect a Database in MySQL in PHP programming language. There are basically two ways you want to access your database. One is to your local server other one is online server.

 

Method 1: Via local server

This method allows you to connect to your local server

 

<?php
//Change your information according to your server
$username = "your_username";
$password = "your_password";
$database = "your_database_name";

//Creating the connection
$connection = mysqli_connect("localhost",$username,$password) or die("Connection not successful.");
//Selecting the database you want to use in your page
mysqli_select_db($connection, $database) or die("Database selection failed.");

//Your content regarding MySQL lies here

//Closing your connection
mysqli_close($connection);
?>

 

Method 2: Via online server

If your server is online use this method but change the “example.com” according to your server.

<?php
//Change your information according to your server

$username = "your_username";
$password = "your_password";
$database = "your_database_name";

//Creating the connection
$connection = mysqli_connect("example.com",$username,$password) or die("Connection not successful.");
//Selecting the database you want to use in your page
mysqli_select_db($connection, $database) or die("Database selection failed.");

//Your content regarding MySQL lies here

//Closing your connection
mysqli_close($connection);
?>

Enjoy…

]]> http://howtoideas.net/how-to-connect-a-database-in-mysql-using-php/feed 0