_make_url_clickable_cb( array $matches ): string
- Since
- 2.3.2
- Source
wp-includes/formatting.php:2932
Description
This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable().
Compatibility
- WordPress
- since 2.3.2
- 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
$matchesarray- Single Regex Match.
Return value
string- HTML A element with URI address.
Performance profile
How much work a call to _make_url_clickable_cb() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 26–49
- Plugin surface
- None
- Called by
- 0
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 65.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()one call below _make_url_clickable_cb()
Further down the call graph this can also reach option, cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost _make_url_clickable_cb() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($url) | 26–36 | substr_count(), substr_count(), esc_url() |
!empty($url) | 39–49 | substr_count(), substr_count(), esc_url(), _make_clickable_rel_attr() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 65 | 26–49 | 6 | |
| 8.5 | 65 | 26–49 | 6 | |
| 8.4 | 65 | 26–49 | 6 | 6 fewer instructions than PHP 8.3 |
| 8.3 | 71 | 26–52 | 6 | |
| 8.2 | 71 | 26–52 | 6 | |
| 8.1 | 71 | 26–52 | 6 | |
| 7.4 | 71 | 26–52 | 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 · 2
- esc_url()Checks and cleans a URL.
- _make_clickable_rel_attr()Helper function used to build the "rel" attribute for a URL when creating an anchor using make_clickable().
Source code
function _make_url_clickable_cb( $matches ) { $url = $matches[2]; if ( ')' === $matches[3] && strpos( $url, '(' ) ) { /* * If the trailing character is a closing parenthesis, and the URL has an opening parenthesis in it, * add the closing parenthesis to the URL. Then we can let the parenthesis balancer do its thing below. */ $url .= $matches[3]; $suffix = ''; } else { $suffix = $matches[3]; } if ( isset( $matches[4] ) && ! empty( $matches[4] ) ) { $url .= $matches[4]; } // Include parentheses in the URL only if paired. while ( substr_count( $url, '(' ) < substr_count( $url, ')' ) ) { $suffix = strrchr( $url, ')' ) . $suffix; $url = substr( $url, 0, strrpos( $url, ')' ) ); } $url = esc_url( $url ); if ( empty( $url ) ) { return $matches[0]; } $rel_attr = _make_clickable_rel_attr( $url ); return $matches[1] . "<a href=\"{$url}\"{$rel_attr}>{$url}</a>" . $suffix;}Changelog
Introduced in 2.3.2. 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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- Generated from the wordpress-develop 6.7.7 tag, from
src/wp-includes/formatting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
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