WP_Http::_get_first_available_transport( array $args, string $url = null ): string|false

Compatibility

Deprecated in WordPress 6.4.0. Use WpOrg\Requests\Requests::get_transport_class()

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$argsarray

Request arguments.

$urlstringoptional

URL to request.Default: null

Return value

string|false

Class name for the first transport that claims to support the request.
False if no transport claims to support the request.

Performance profile

How much work a call to WP_Http::_get_first_available_transport() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

14–30

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 32.

Plugin surface

1 hook

Third-party callbacks on 'http_api_transports' run inside this call, and their cost is not bounded by anything here.

Called by

1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

• hookthird-party callbacksapply_filters_deprecated()called directly

Further down the call graph this can also reach query, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 3 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Http::_get_first_available_transport() can have, taken from its control-flow graph on PHP 8.5.

Hooks and filters fired · 1

One hook fires while WP_Http::_get_first_available_transport() runs, in this order:

1. 1
   do_action( http_api_transports )filter_deprecatedline 561 (+14 into the body)

   Filters which HTTP transports are available and in what order.

Uses · 1

• apply_filters_deprecated()Fires functions attached to a deprecated filter hook.

Used by · 1

• WP_Http::_dispatch_request()Dispatches a HTTP request to a supporting transport.

Source code

View on Trac ↗View on GitHub ↗

547	public function _get_first_available_transport( $args, $url = null ) {548		$transports = array( 'curl', 'streams' );549 550		/**551		 * Filters which HTTP transports are available and in what order.552		 *553		 * @since 3.7.0554		 * @deprecated 6.4.0 Use WpOrg\Requests\Requests::get_transport_class()555		 *556		 * @param string[] $transports Array of HTTP transports to check. Default array contains557		 *                             'curl' and 'streams', in that order.558		 * @param array    $args       HTTP request arguments.559		 * @param string   $url        The URL to request.560		 */561		$request_order = apply_filters_deprecated( 'http_api_transports', array( $transports, $args, $url ), '6.4.0' );562 563		// Loop over each transport on each HTTP request looking for one which will serve this request's needs.564		foreach ( $request_order as $transport ) {565			if ( in_array( $transport, $transports, true ) ) {566				$transport = ucfirst( $transport );567			}568			$class = 'WP_Http_' . $transport;569 570			// Check to see if this transport is a possibility, calls the transport statically.571			if ( ! call_user_func( array( $class, 'test' ), $args, $url ) ) {572				continue;573			}574 575			return $class;576		}577 578		return false;579	}

Changelog

Introduced in 3.2.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/class-wp-http.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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