WP_Http::chunkTransferDecode( string $body ): string
- Since
- 2.7.0
- Source
wp-includes/class-wp-http.php:836
Description
Based off the HTTP http_encoding_dechunk function.
Compatibility
- WordPress
- since 2.7.0
- 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
$bodystring- Body content.
Return value
string- Chunked decoded body on success or raw body on failure.
Performance profile
How much work a call to WP_Http::chunkTransferDecode() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 5–31
- Plugin surface
- None
- Called by
- 1
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 33.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What one call costs · 3 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Http::chunkTransferDecode() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5 | none |
| always | 14–16 | preg_match() |
!empty($match) | 31 | preg_match(), hexdec() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 33 | 5–31 | 4 | |
| 8.5 | 33 | 5–31 | 4 | |
| 8.4 | 33 | 5–31 | 4 | 13 fewer instructions than PHP 8.3 |
| 8.3 | 46 | 10–44 | 4 | |
| 8.2 | 46 | 10–44 | 4 | |
| 8.1 | 46 | 10–44 | 4 | |
| 7.4 | 46 | 10–44 | 4 |
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.
Used by · 1
- WP_Http_Streams::request()Send a HTTP request to a URI using PHP Streams.
Source code
public static function chunkTransferDecode( $body ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid // The body is not chunked encoded or is malformed. if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) ) { return $body; } $parsed_body = ''; // We'll be altering $body, so need a backup in case of error. $body_original = $body; while ( true ) { $has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match ); if ( ! $has_chunk || empty( $match[1] ) ) { return $body_original; } $length = hexdec( $match[1] ); $chunk_length = strlen( $match[0] ); // Parse out the chunk of data. $parsed_body .= substr( $body, $chunk_length, $length ); // Remove the chunk from the raw data. $body = substr( $body, $length + $chunk_length ); // End of the document. if ( '0' === trim( $body ) ) { return $parsed_body; } } }Changelog
Introduced in 2.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 6.7.7 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
- Something wrong on this page? Report it and it gets fixed in the next regeneration.