wp_parse_url

函数



      wp_parse_url ( $url, $component = -1 )

参数

(string)
$url
The URL to parse.
Required: 是
(int)
$component
The specific component to retrieve. Use one of the PHP predefined constants to specify which one. Defaults to -1 (= return all parts as an array).
Required: 否

Default: -1

返回值

(mixed) False on parse failure; Array of URL components on success; When a specific component has been requested: null if the component doesn’t exist in the given URL; a string or – in the case of PHP_URL_PORT – integer when it does. See parse_url()’s return values.

定义位置

wp-includes/http.php
, line 685

引入: 4.4.0

弃用: –

A wrapper for PHP’s parse_url() function that handles consistency in the return values
across PHP versions.

PHP 5.4.7 expanded parse_url()’s ability to handle non-absolute URLs, including
schemeless and relative URLs with “://” in the path. This function works around
those limitations providing a standard output on PHP 5.2~5.4+.

Secondly, across various PHP versions, schemeless URLs containing a “:” in the query
are being handled inconsistently. This function works around those differences as well.

function wp_parse_url( $url, $component = -1 ) {
	$to_unset = array();
	$url      = (string) $url;

	if ( '//' === substr( $url, 0, 2 ) ) {
		$to_unset[] = 'scheme';
		$url        = 'placeholder:' . $url;
	} elseif ( '/' === substr( $url, 0, 1 ) ) {
		$to_unset[] = 'scheme';
		$to_unset[] = 'host';
		$url        = 'placeholder://placeholder' . $url;
	}

	$parts = parse_url( $url );

	if ( false === $parts ) {
		// Parsing failure.
		return $parts;
	}

	// Remove the placeholder values.
	foreach ( $to_unset as $key ) {
		unset( $parts[ $key ] );
	}

	return _get_component_from_parsed_url_array( $parts, $component );
}

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