reset_mbstring_encoding()
- Since
- 3.7.0
- Source
wp-includes/functions.php:7815
Compatibility
- WordPress
- since 3.7.0
- 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.
Performance profile
How much work a call to reset_mbstring_encoding() 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
- Trivial
- Scaling
- Constant
- Instructions
- 4
- Plugin surface
- None
- Called by
- 12
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5. The body compiles to 4.
Nothing here hands control to plugin code.
12 places in core call this, so the cost is paid more often than your own code shows.
What one call costs · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost reset_mbstring_encoding() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 4 | mbstring_binary_safe_encoding() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 4 | 4 | 0 | |
| 8.5 | 4 | 4 | 0 | |
| 8.4 | 4 | 4 | 0 | 37 fewer instructions than PHP 8.3 |
| 8.3 | 41 | 13–36 | 4 | |
| 8.2 | 41 | 13–36 | 4 | |
| 8.1 | 41 | 13–36 | 4 | |
| 7.4 | 41 | 13–36 | 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.
Uses · 1
- mbstring_binary_safe_encoding()Sets the mbstring internal encoding to a binary safe encoding when func_overload is enabled.
Used by · 12
- WP_Filesystem_Direct::put_contents()Writes a string to a file.
- WP_Filesystem_FTPext::put_contents()Writes a string to a file.
- WP_Filesystem_ftpsockets::dirlist()Gets details for files in a directory or a specific file.
- WP_Filesystem_ftpsockets::get_contents()Reads entire file into a string.
- WP_Filesystem_ftpsockets::put_contents()Writes a string to a file.
- WP_Http::request()Send an HTTP request to a URI.
- _unzip_file_pclzip()Attempts to unzip an archive using the PclZip library.
- seems_utf8()Checks to see if a string is utf8 encoded.
- utf8_uri_encode()Encodes the Unicode values to be used in the URI.
- verify_file_signature()Verifies the contents of a file against its ED25519 signature.
- wp_read_image_metadata()Gets extended image metadata, exif or iptc as available.
- wpdb::strip_invalid_text()Strips any invalid characters based on value/charset pairs.
Source code
function reset_mbstring_encoding() { mbstring_binary_safe_encoding( true );}Changelog
Introduced in 3.7.0. 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 7.1.0 tag, from
src/wp-includes/functions.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.