WP_Filesystem_FTPext::exists( string $path ): bool
- Since
- 2.5.0, 6.3.0
- Source
wp-admin/includes/class-wp-filesystem-ftpext.php:427
Compatibility
- WordPress
- since 6.3.0
- 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
$pathstring- Path to file or directory.
Return value
bool- Whether $path exists or not.
Performance profile
How much work a call to WP_Filesystem_FTPext::exists() 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
- 4–19
- Plugin surface
- None
- Called by
- 2
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, depending on the branch taken. The body compiles to 21.
Nothing here hands control to plugin code.
2 places 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_Filesystem_FTPext::exists() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
$path === "" | 4 | none |
$path !== "" && !empty($list) | 15 | ftp_nlist() |
$path !== "" && empty($list) | 17–19 | ftp_nlist(), ->is_dir() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 21 | 4–19 | 3 | |
| 8.5 | 21 | 4–19 | 3 | |
| 8.4 | 21 | 4–19 | 3 | |
| 8.3 | 21 | 4–19 | 3 | |
| 8.2 | 21 | 4–19 | 3 | 1 more instruction than PHP 8.1 |
| 8.1 | 20 | 4–18 | 3 | |
| 7.4 | 20 | 4–18 | 3 |
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
- WP_Filesystem_FTPext::is_dir()Checks if resource is a directory.
Used by · 2
- WP_Filesystem_FTPext::copy()Copies a file.
- WP_Filesystem_FTPext::is_file()Checks if resource is a file.
Source code
public function exists( $path ) { /* * Check for empty path. If ftp_nlist() receives an empty path, * it checks the current working directory and may return true. * * See https://core.trac.wordpress.org/ticket/33058. */ if ( '' === $path ) { return false; } $list = ftp_nlist( $this->link, $path ); if ( empty( $list ) && $this->is_dir( $path ) ) { return true; // File is an empty directory. } return ! empty( $list ); // Empty list = no file, so invert. }Changelog
Introduced in 2.5.0. 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 7.0.4 tag, from
src/wp-admin/includes/class-wp-filesystem-ftpext.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.