The http_build_query() function is an inbuilt function in PHP which is used to generate URL-encoded query string from the associative (or indexed) array.
Syntax:
string http_build_query( $query_data, $numeric_prefix, $arg_separator, $enc_type = PHP_QUERY_RFC1738 )
Parameters: This function accepts four parameters as mentioned above and described below:
- $query_data: This parameter holds the array or object containing properties which are given below:
- It may be a single dimensional array or multi-dimensional array.
- If $query_data is an object then only public property will be incorporated into the result .
- $numeric_prefix: This parameter is used if numeric indices are used in the base array, it will be prepended to the numeric index for elements in the base array only.
- $arg_separator: It is used to separate arguments but may be overridden by specifying this parameter.
- $enc_type: Its default value is PHP_QUERY_RFC1738.
Return Values: It returns a URL-encoded string.
Below programs illustrate the http_build_query() function in PHP:
Program 1:
<?php $info = array( 'sudo' => 'placement', 'CPP' => 'course', 'FORK' => 'C', ); echo http_build_query($info) . "#"; echo http_build_query($info, '', '&'); ?> |
Output:
sudo=placement&CPP=course&FORK=C#sudo=placement&CPP=course&FORK=C
Program 2:
<?php $info = array('neveropen', 'gfg' => 'sudo', 'placement' => 'hypertext processor'); echo http_build_query($info) . "$"; echo http_build_query($info, 'myvar_'); ?> |
Output:
0=neveropen&gfg=sudo&placement=hypertext+processor$myvar_0=neveropen&gfg=sudo&placement=hypertext+processor
Reference: http://docs.php.net/manual/da/function.http-build-query.php
