wppaste
WordPress

comment_link( int|WP_Comment $comment = null )

Since
1.5.0, 4.4.0
Source
wp-includes/feed.php:309
Displays the link to the comments.

Compatibility

WordPress
since 4.4.0
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

$commentint|WP_Commentoptional
Comment object or ID. Defaults to global comment object.Default: null

Performance profile

How much work a call to comment_link() 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
Moderate

Reads stored settings via get_option(), cached per request but not free on a cold cache.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
13

Executed per call on PHP 8.5. The body compiles to 13.

Plugin surface
1 hook

Third-party callbacks on 'comment_link' run inside this call, and their cost is not bounded by anything here.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • hookthird-party callbacksapply_filters()called directly
  • optionoption read or writeget_option()one call below comment_link()

Further down the call graph this can also reach query, cache, serialize 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 · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost comment_link() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always13get_comment_link(), apply_filters(), esc_url()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 13 instructions, 13 executed per call, 0 branches. The work does not change between versions.

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.

Hooks and filters fired · 1

One hook fires while comment_link() runs, in this order:

  1. apply_filters( comment_link )filterline 319 (+10 into the body)

    Filters the current comment's permalink.

Uses · 3

Source code

View on Trac View on GitHub 

function comment_link( $comment = null ) {	/**	 * Filters the current comment's permalink.	 *	 * @since 3.6.0	 *	 * @see get_comment_link()	 *	 * @param string $comment_permalink The current comment permalink.	 */	echo esc_url( apply_filters( 'comment_link', get_comment_link( $comment ) ) );}

Changelog

Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

4.4.0
Introduced the $comment argument.from the docblock
1.5.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 7.0.4 tag, from src/wp-includes/feed.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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