What is HTTP_HOST?

The HTTP_HOST is obtained from the HTTP request header and this is what the client actually used as “target host” of the request. The SERVER_NAME is defined in server config.

What is $_ SERVER [‘ HTTP_HOST ‘]?

$_SERVER[‘HTTP_HOST’] gives you the domain name through which the current request is being fulfilled and is more directly related to the request.

What is $_ SERVER and why we use?

$_SERVER is a superglobal that holds information regarding HTTP headers, path and script location etc. All the server and execution environment related information is available in this associative array. Most of the entries in this array are populated by web server.

Does HTTP_HOST include port?

And yet the HTTP_HOST usually contains just the domain name, but sometimes contains also the port number.

What is the value of HTTP_HOST?

The HTTP_HOST server variable contains the value of the Host HTTP request header (ie. the hostname), this is irrespective of the protocol used (HTTP or HTTPS). As with all variables that start HTTP_ , they contain the value of the respective HTTP request header.

What is Request_uri in Apache?

{REQUEST_URI} is that part of the URI which follows the domain up to but not including the ? character of a query string, and is the only Apache variable that a rewrite rule attempts to match.

What is $_ in PHP?

PHP $_GET is a PHP super global variable which is used to collect form data after submitting an HTML form with method=”get”. $_GET can also collect data sent in the URL.

What is $_ request in PHP?

PHP $_REQUEST is a PHP super global variable which is used to collect data after submitting an HTML form. The example below shows a form with an input field and a submit button. When a user submits the data by clicking on “Submit”, the form data is sent to the file specified in the action attribute of the <form> tag.

How does PHP Isset work?

PHP isset() Function

The isset() function checks whether a variable is set, which means that it has to be declared and is not NULL. This function returns true if the variable exists and is not NULL, otherwise it returns false.

How can I know my hostname in PHP?

The gethostname() function is an inbuilt function in PHP which returns the host or domain name for the local machine. This function is applicable after PHP 5.3. 0 before that there was another function called php_uname function.

What is host header in HTTP?

The Host request header specifies the host and port number of the server to which the request is being sent. If no port is included, the default port for the service requested is implied (e.g., 443 for an HTTPS URL, and 80 for an HTTP URL). A Host header field must be sent in all HTTP/1.1 request messages.

What is $_ server Php_self?

The $_SERVER[“PHP_SELF”] is a super global variable that returns the filename of the currently executing script. So, the $_SERVER[“PHP_SELF”] sends the submitted form data to the page itself, instead of jumping to a different page. This way, the user will get error messages on the same page as the form.

What is $_ server [‘ Remote_addr ‘]?

$_SERVER[‘REMOTE_ADDR’] Returns the IP address from where the user is viewing the current page.

What is $_ server Request_method == post?

if($_SERVER[‘REQUEST_METHOD’] == ‘POST’) Because the purpose of this function is to CHECK whether the request was done via $_POST or $_GET . $_POST are almost always done in some kind of form whether it’d be through Javascript or HTML , you’re still submitting the form. $_GET is usually through the URL or link.

What is difference between $_ request and $_ POST?

$_POST : It can catch the data which is sent using POST method. $_GET : It can catch the data which is sent using GET method. $_REQUEST : It can catch the data which is sent using both POST & GET methods.

What is difference between session and cookies?

Cookies and Sessions are used to store information. Cookies are only stored on the client-side machine, while sessions get stored on the client as well as a server. A session creates a file in a temporary directory on the server where registered session variables and their values are stored.

How many types of arrays are there in PHP?

three types

In PHP, there are three types of arrays: Indexed arrays – Arrays with a numeric index. Associative arrays – Arrays with named keys. Multidimensional arrays – Arrays containing one or more arrays.

What is the difference between echo and print in PHP?

echo and print are more or less the same. They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions.

What is the difference between $VAR and $$ VAR?

Difference between Both: The variable $var is used to store the value of the variable and the variable $$val is used to store the reference of the variable.

What is the difference between == and === operator in PHP?

== Operator: This operator is used to check the given values are equal or not. If yes, it returns true, otherwise it returns false. === Operator: This operator is used to check the given values and its data type are equal or not. If yes, then it returns true, otherwise it returns false.

What is $$ in PHP?

PHP $ and $$ Variables. The $var (single dollar) is a normal variable with the name var that stores any value like string, integer, float, etc. The $$var (double dollar) is a reference variable that stores the value of the $variable inside it.

Is PHP a software?

The standard PHP interpreter, powered by the Zend Engine, is free software released under the PHP License. PHP has been widely ported and can be deployed on most web servers on a variety of operating systems and platforms.

Why echo is used in PHP?

The echo is used to display the output of parameters that are passed to it. It displays the outputs of one or more strings separated by commas. The print accepts one argument at a time & cannot be used as a variable function in PHP. The print outputs only the strings.