PHP Program to show current page URL

How to Get Current Page URL, Domain, Query String in PHP

In this tutorial, We would love to share with you, How to get current page URL in PHP, PHP get current URL path, PHP get full URL with parameters, PHP get a current page, PHP get current URL with query string, PHP get a domain from URL.

How to Get Current Page URL in PHP

Here you will discuss about superglobal variable $_SERVER, this is built-in PHP variable. We will use this variable get the current page URL in PHP. You can get every piece of information about the current URL using the $_SERVER superglobal.

Before we try to fetch the Current Page Full URL lets see how a normal URL structure looks like:

http://www.abc.com/dir1/test.php?glob=hello&name=world

Any typical URL like this can be broken into several common parts like:

• HTTP: The URL protocol
• www.abc.com – The domain name or the hostname.
• dir1: The directory within the root
• test.php – The actual PHP script
• glob=hello – the first URL parameter (glob) and it’s a value (hello)
• name=world – the second URL parameter (name) and its value (world)

Now we will create a program that is used to get current page url.

PHP Program for get Current Page Url

Program 1 full source Code

     
PHP Program to show current page URL
   

PHP Program show Current page full URL

Program 2 full source Code

     
PHP Program show Current page full URL
   

PHP Program show Current full URL with Query String

Program 3 full source Code

     
PHP Program show Current page full URL with Query String
   

Other Important elements of $_SERVER that are very are useful and you must know that:

• $_SERVER[‘SERVER_ADDR’]: IP address of the server
• $_SERVER[‘REQUEST_METHOD’]: Returns the page access method used i.e. ‘GET’, ‘HEAD’, ‘POST’, ‘PUT’.
• $_SERVER[‘REQUEST_TIME’]: timestamp of the start of the request.
• $_SERVER[‘HTTP_REFERER’]: returns the referrer page uri – used in redirecting to last page after login
• $_SERVER[‘SCRIPT_FILENAME’]: returns the path including the filename, like DIR
• $_SERVER[‘HTTP_COOKIE’]. returns the raw value of the ‘Cookie’ header sent by the user agent.
• $_SERVER[‘HTTP_ACCEPT_LANGUAGE’]): returns the default set language – useful for websites with multilingual content & readers
• $_SERVER[‘HTTP_USER_AGENT’]: returns the kind of device being used to access (desktop/mobile device etc) – suitable for switching interface for different devices.

Author Admin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

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http_build_query

Generates a URL-encoded query string from the associative (or indexed) array provided.

Parameters

May be an array or object containing properties.

If data is an array, it may be a simple one-dimensional structure, or an array of arrays (which in turn may contain other arrays).

If data is an object, then only public properties will be incorporated into the result.

If numeric indices are used in the base array and this parameter is provided, it will be prepended to the numeric index for elements in the base array only.

This is meant to allow for legal variable names when the data is decoded by PHP or another CGI application later on.

The argument separator. If not set or null , arg_separator.output is used to separate arguments.

By default, PHP_QUERY_RFC1738 .

If encoding_type is PHP_QUERY_RFC1738 , then encoding is performed per » RFC 1738 and the application/x-www-form-urlencoded media type, which implies that spaces are encoded as plus ( + ) signs.

If encoding_type is PHP_QUERY_RFC3986 , then encoding is performed according to » RFC 3986, and spaces will be percent encoded ( %20 ).

Return Values

Returns a URL-encoded string.

Changelog

Examples

Example #1 Simple usage of http_build_query()

$data = array(
‘foo’ => ‘bar’ ,
‘baz’ => ‘boom’ ,
‘cow’ => ‘milk’ ,
‘null’ => null ,
‘php’ => ‘hypertext processor’
);

echo http_build_query ( $data ) . «\n» ;
echo http_build_query ( $data , » , ‘&’ );

The above example will output:

foo=bar&baz=boom&cow=milk&php=hypertext+processor foo=bar&baz=boom&cow=milk&php=hypertext+processor

Example #2 http_build_query() with numerically index elements.

$data = array( ‘foo’ , ‘bar’ , ‘baz’ , null , ‘boom’ , ‘cow’ => ‘milk’ , ‘php’ => ‘hypertext processor’ );

echo http_build_query ( $data ) . «\n» ;
echo http_build_query ( $data , ‘myvar_’ );
?>

The above example will output:

0=foo&1=bar&2=baz&4=boom&cow=milk&php=hypertext+processor myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_4=boom&cow=milk&php=hypertext+processor

Example #3 http_build_query() with complex arrays

$data = array(
‘user’ => array(
‘name’ => ‘Bob Smith’ ,
‘age’ => 47 ,
‘sex’ => ‘M’ ,
‘dob’ => ‘5/12/1956’
),
‘pastimes’ => array( ‘golf’ , ‘opera’ , ‘poker’ , ‘rap’ ),
‘children’ => array(
‘bobby’ => array( ‘age’ => 12 , ‘sex’ => ‘M’ ),
‘sally’ => array( ‘age’ => 8 , ‘sex’ => ‘F’ )
),
‘CEO’
);

echo http_build_query ( $data , ‘flags_’ );
?>

The above example will output: (word wrapped for readability)

user%5Bname%5D=Bob+Smith&user%5Bage%5D=47&user%5Bsex%5D=M& user%5Bdob%5D=5%2F12%2F1956&pastimes%5B0%5D=golf&pastimes%5B1%5D=opera& pastimes%5B2%5D=poker&pastimes%5B3%5D=rap&children%5Bbobby%5D%5Bage%5D=12& children%5Bbobby%5D%5Bsex%5D=M&children%5Bsally%5D%5Bage%5D=8& children%5Bsally%5D%5Bsex%5D=F&flags_0=CEO

Note:

Only the numerically indexed element in the base array «CEO» received a prefix. The other numeric indices, found under pastimes, do not require a string prefix to be legal variable names.

Example #4 Using http_build_query() with an object

class parentClass public $pub = ‘publicParent’ ;
protected $prot = ‘protectedParent’ ;
private $priv = ‘privateParent’ ;
public $pub_bar = null ;
protected $prot_bar = null ;
private $priv_bar = null ;

public function __construct () $this -> pub_bar = new childClass ();
$this -> prot_bar = new childClass ();
$this -> priv_bar = new childClass ();
>
>

class childClass public $pub = ‘publicChild’ ;
protected $prot = ‘protectedChild’ ;
private $priv = ‘privateChild’ ;
>

echo http_build_query ( $parent );
?>

The above example will output:

pub=publicParent&pub_bar%5Bpub%5D=publicChild

See Also

• parse_str() — Parses the string into variables
• parse_url() — Parse a URL and return its components
• urlencode() — URL-encodes string
• array_walk() — Apply a user supplied function to every member of an array

User Contributed Notes 24 notes

Params with null value do not present in result string.

$arr = array( ‘test’ => null , ‘test2’ => 1 );
echo http_build_query ( $arr );
?>

will produce:

Number to string conversion occured in is affected by locale settings, which might not be obvious.

setlocale ( LC_ALL , ‘us_En’ );
http_build_query ( $params ) // v=5.63

setlocale ( LC_ALL , ‘ru_RU’ );
http_build_query ( $params ) // v=5,63 mind the comma
?>

Passing null to $arg_separator is the same as passing an empty string, which is probably not what you want.

If you need to change the enc_type, use this:

http_build_query($query, null, ini_get(‘arg_separator.output’), PHP_QUERY_RFC3986);

// BAD CODE!
http_build_query($query, null, null, PHP_QUERY_RFC3986);

if you send boolean values it transform in integer :

$a = [teste1= true,teste2=false];
echo http_build_query($a)

//result will be teste1=1&teste2=0

This function makes like this

$query = http_build_query($query);
$query = preg_replace(‘/%5B7+%5D/simU’, ‘%5B%5D’, $query);

As noted before, with php5.3 the separator is & on some servers it seems. Normally if posting to another php5.3 machine this will not be a problem.

But if you post to a tomcat java server or something else the & might not be handled properly.

http_build_query($array); //gives & to some servers

If you need the inverse functionality, and (like me) you cannot use pecl_http, you may want to use something akin to the following.

// mimic the behavior of $_GET, see also RFC 1738 and 3986.
$Delimiter = ini_get ( ‘arg_separator.input’ );
$Params = array();

if (!empty( $NameValueParts [ ‘indices_present’ ])) $Indices = explode ( ‘][‘ , $NameValueParts [ ‘indices’ ]);

foreach ( $Indices as $Index ) if (! is_array ( $Param )) $Param = array();
>

if ( $Index === » ) $Param [] = array();
end ( $Param );
$Param =& $Param [ key ( $Param )];
> else if ( ctype_digit ( $Index ))

if (! array_key_exists ( $Index , $Param )) $Param [ $Index ] = array();
>
$Param =& $Param [ $Index ];
>
>
>

if (!empty( $NameValueParts [ ‘value_present’ ])) $Param = urldecode ( $NameValueParts [ ‘value’ ]);
> else $Param = » ;
>
>
>

Is it worth noting that if query_data is an associative array and a value is itself an empty array, or an array of nothing but empty array (or arrays containing only empty arrays etc.), the corresponding key will not appear in the resulting query string?
E.g.

$post_data = array(‘name’=>’miller’, ‘address’=>array(‘address_lines’=>array()), ‘age’=>23);
echo http_build_query($post_data);

When using the http_build_query function to create a URL query from an array for use in something like curl_setopt($ch, CURLOPT_POSTFIELDS, $post_url), be careful about the url encoding.

In my case, I simply wanted to pass on the received $_POST data to a CURL’s POST data, which requires it to be in the URL format. If something like a space [ ] goes into the http_build_query, it comes out as a +. If you’re then sending this off for POST again, you won’t get the expected result. This is good for GET but not POST.

Instead you can make your own simple function if you simply want to pass along the data:

$post_url = » ;
foreach ( $_POST AS $key => $value )
$post_url .= $key . ‘=’ . $value . ‘&’ ;
$post_url = rtrim ( $post_url , ‘&’ );
?>

You can then use this to pass along POST data in CURL.

$ch = curl_init ( $some_url );
curl_setopt ( $ch , CURLOPT_POST , true );
curl_setopt ( $ch , CURLOPT_POSTFIELDS , $post_url );
curl_exec ( $ch );
?>

Note that at the final page that processes the POST data, you should be properly filtering/escaping it.

As noted, this function omits keys with null values. This could break some code which treats the key as boolean, and so has no value, or other code expecting the array to be populated regardless of value.

A workaround for this is to replace the null values with an empty string:

// Compensate for fact that http_build_query omits null values
foreach($data as &$datum) if($datum===null) $datum=»;

Losing the null-ness of the original is no real loss if it’s supposed to be a real query string. If the null is important, you could use a dummy value instead.

Be careful about Example 1 — it is exactly how *not* to implement things.

You should HTML encode your URL if embedding it in a web page. This is more involved than just replacing & with &. Doing as this example suggests is a security hole waiting to happen.

Correct implementation of coding the array of params without indexes (valdikks fixed code — didnt work for inner arrays):

I noticed that even with the magic quotes disabled, http_build_query() automagically adds slashes to strings.

So, I had to add «stripslashes» to every string variable.

on my install of PHP 5.3, http_build_query() seems to use & as the default separator. Kind of interesting when combined with stream_context_create() for a POST request, and getting $_POST[‘amp;fieldName’] on the receiving end.

When using http_build_query($args) where $args is an array; note that there is a limit to the size of array. See max_input_vars in your php.ini to increase this size.

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