wppaste
WordPress

wp_remote_fopen( string $uri ): string|false

Since
1.5.1
Source
wp-includes/functions.php:1310
HTTP request for URI to retrieve content.

Compatibility

WordPress
since 1.5.1
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

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

Parameters

$uristring
URI/URL of web page to retrieve.

Return value

string|false
HTTP content. False on failure.

Performance profile

How much work a call to wp_remote_fopen() 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_get().

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
7–22

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 24.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • httpoutbound HTTP requestwp_safe_remote_get()called directly
  • hookthird-party callbacksdo_action()one call below wp_remote_fopen()

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_remote_fopen() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always7–9parse_url()
is_array($parsed_url) && is_wp_error()19parse_url(), wp_safe_remote_get(), is_wp_error()
is_array($parsed_url) && !is_wp_error()22parse_url(), wp_safe_remote_get(), is_wp_error(), wp_remote_retrieve_body()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 24 instructions, 7–22 executed per call, 3 branches. The work does not change between versions.

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Uses · 3

Source code

View on Trac View on GitHub 

function wp_remote_fopen( $uri ) {	$parsed_url = parse_url( $uri ); 	if ( ! $parsed_url || ! is_array( $parsed_url ) ) {		return false;	} 	$options            = array();	$options['timeout'] = 10; 	$response = wp_safe_remote_get( $uri, $options ); 	if ( is_wp_error( $response ) ) {		return false;	} 	return wp_remote_retrieve_body( $response );}

Changelog

Introduced in 1.5.1. 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 6.9.7 tag, from src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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