apache_mod_loaded( string $mod, bool $default_value = false ): bool
- Since
- 2.5.0
- Source
wp-includes/functions.php:6288
Compatibility
- WordPress
- since 2.5.0
- 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
$modstring- The module, e.g. mod_rewrite.
$default_valuebooloptional- The default return value if the module is not found. Default false.Default:
false
Return value
bool- Whether the specified module is loaded.
Performance profile
How much work a call to apache_mod_loaded() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 5–28
- Plugin surface
- None
- Called by
- 2
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 31.
Nothing here hands control to plugin code.
2 places in core call this, so the cost is paid more often than your own code shows.
What one call costs · 5 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost apache_mod_loaded() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5 | none |
!function_exists() && !empty($loaded_mods) | 12 | function_exists() |
function_exists() | 16–18 | function_exists(), apache_get_modules() |
!function_exists() && empty($loaded_mods) | 22 | function_exists(), ob_start(), phpinfo(), ob_get_clean() |
function_exists() && !$mod && empty($loaded_mods) | 28 | function_exists(), apache_get_modules(), ob_start(), phpinfo(), ob_get_clean() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 31 | 5–28 | 5 | |
| 8.5 | 31 | 5–28 | 5 | |
| 8.4 | 31 | 5–28 | 5 | 6 fewer instructions than PHP 8.3 |
| 8.3 | 37 | 5–34 | 5 | |
| 8.2 | 37 | 5–34 | 5 | |
| 8.1 | 37 | 5–34 | 5 | 6 fewer instructions than PHP 7.4 |
| 7.4 | 43 | 5–40 | 6 |
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
- str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
Used by · 2
- got_mod_rewrite()Returns whether the server is running Apache with the mod_rewrite module loaded.
- network_step1()Prints step 1 for Network installation process.
Source code
function apache_mod_loaded( $mod, $default_value = false ) { global $is_apache; if ( ! $is_apache ) { return false; } $loaded_mods = array(); if ( function_exists( 'apache_get_modules' ) ) { $loaded_mods = apache_get_modules(); if ( in_array( $mod, $loaded_mods, true ) ) { return true; } } if ( empty( $loaded_mods ) && function_exists( 'phpinfo' ) && ! str_contains( ini_get( 'disable_functions' ), 'phpinfo' ) ) { ob_start(); phpinfo( INFO_MODULES ); $phpinfo = ob_get_clean(); if ( str_contains( $phpinfo, $mod ) ) { return true; } } return $default_value;}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
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