_http_build_query() │ WP 3.2.0

From php.net (modified by Mark Jaquith to behave like the native PHP5 function).

No Hooks.

Returns

String. The query string.

Usage

_http_build_query( $data, $prefix, $sep, $key, $urlencode );

$data(array|object) (required)

An array or object of data. Converted to array.

$prefix(string)

Numeric index. If set, start parameter numbering with it.
Default: null

$sep(string)

Argument separator; defaults to 'arg_separator.output'.
Default: null

$key(string)

Used to prefix key name.
Default: empty string

$urlencode(true|false)

Whether to use urlencode() in the result.
Default: true

Notes

• See: https://www.php.net/manual/en/function.http-build-query.php

Changelog

_http_build_query() http build query code ^{WP 7.0}

function _http_build_query( $data, $prefix = null, $sep = null, $key = '', $urlencode = true ) {
	$ret = array();

	foreach ( (array) $data as $k => $v ) {
		if ( $urlencode ) {
			$k = urlencode( $k );
		}

		if ( is_int( $k ) && null !== $prefix ) {
			$k = $prefix . $k;
		}

		if ( ! empty( $key ) ) {
			$k = $key . '%5B' . $k . '%5D';
		}

		if ( null === $v ) {
			continue;
		} elseif ( false === $v ) {
			$v = '0';
		}

		if ( is_array( $v ) || is_object( $v ) ) {
			array_push( $ret, _http_build_query( $v, '', $sep, $k, $urlencode ) );
		} elseif ( $urlencode ) {
			array_push( $ret, $k . '=' . urlencode( $v ) );
		} else {
			array_push( $ret, $k . '=' . $v );
		}
	}

	if ( null === $sep ) {
		$sep = ini_get( 'arg_separator.output' );
	}

	return implode( $sep, $ret );
}