_fetch_remote_file( string $url, array $headers = "" ): Snoopy

Compatibility

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

Parameters

$urlstring

URL to retrieve

$headersarrayoptional

Headers to send to the URL. Default empty string.Default: ""

Return value

Snoopy

style response

Performance profile

How much work a call to _fetch_remote_file() 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

Expensive

Reaches an outbound HTTP request via wp_safe_remote_request().

Scaling

Scales with input

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

Instructions

31–42

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 78.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

1

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

What it touches

• httpoutbound HTTP requestwp_safe_remote_request()called directly
• hookthird-party callbacksdo_action()one call below _fetch_remote_file()

What one call costs · 2 distinct outcomes

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

Uses · 6

• wp_safe_remote_request()Retrieves the raw response from a safe HTTP request.
• is_wp_error()Checks whether the given variable is a WordPress Error.
• wp_remote_retrieve_headers()Retrieves only the headers from the raw response.
• wp_remote_retrieve_response_code()Retrieves only the response code from the raw response.
• wp_remote_retrieve_body()Retrieves only the body from the raw response.
• stdClass::__construct()

Used by · 1

• fetch_rss()Build Magpie object based on RSS from URL.

Source code

View on Trac ↗View on GitHub ↗

547function _fetch_remote_file($url, $headers = "" ) {548	$resp = wp_safe_remote_request( $url, array( 'headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT ) );549	if ( is_wp_error($resp) ) {550		$error = array_shift($resp->errors);551 552		$resp = new stdClass;553		$resp->status = 500;554		$resp->response_code = 500;555		$resp->error = $error[0] . "\n"; //\n = Snoopy compatibility556		return $resp;557	}558 559	// Snoopy returns headers unprocessed.560	// Also note, WP_HTTP lowercases all keys, Snoopy did not.561	$return_headers = array();562	foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) {563		if ( !is_array($value) ) {564			$return_headers[] = "$key: $value";565		} else {566			foreach ( $value as $v )567				$return_headers[] = "$key: $v";568		}569	}570 571	$response = new stdClass;572	$response->status = wp_remote_retrieve_response_code( $resp );573	$response->response_code = wp_remote_retrieve_response_code( $resp );574	$response->headers = $return_headers;575	$response->results = wp_remote_retrieve_body( $resp );576 577	return $response;578}

Changelog

Introduced in 1.5.0. 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

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