wp_ajax_send_attachment_to_editor()

Description

Compatibility

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 wp_ajax_send_attachment_to_editor() 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

Heavy

Reaches the database via get_post().

Scaling

Constant

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

Instructions

64–105

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 146.

Plugin surface

1 hook

Third-party callbacks on 'media_send_to_editor' 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

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

Further down the call graph this can also reach 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 · 60 distinct outcomes

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

Hooks and filters fired · 1

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

1. 1
   apply_filters( media_send_to_editor )filterline 3380 (+60 into the body)

   Filters the HTML markup for a media item sent to the editor.

Uses · 16

• check_ajax_referer()Verifies the Ajax request to prevent processing requests external of the blog.
• wp_unslash()Removes slashes from a string or recursively removes slashes from strings within an array.
• get_post()Retrieves post data given a post ID or post object.
• wp_send_json_error()Sends a JSON response back to an Ajax request, indicating failure.
• current_user_can()Returns whether the current user has the specified capability.
• wp_update_post()Updates a post with new post data.
• str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
• get_attachment_link()Retrieves the permalink for an attachment.
• remove_filter()Removes a callback function from a filter hook.
• str_starts_with()Polyfill for `str_starts_with()` function added in PHP 8.0.
• get_image_send_to_editor()Retrieves the image HTML to send to the editor.
• wp_attachment_is()Verifies an attachment is of a given type.

Source code

View on Trac ↗View on GitHub ↗

3320function wp_ajax_send_attachment_to_editor() {3321	check_ajax_referer( 'media-send-to-editor', 'nonce' );3322 3323	$attachment = wp_unslash( $_POST['attachment'] );3324 3325	$id = (int) $attachment['id'];3326 3327	$post = get_post( $id );3328	if ( ! $post ) {3329		wp_send_json_error();3330	}3331 3332	if ( 'attachment' !== $post->post_type ) {3333		wp_send_json_error();3334	}3335 3336	if ( current_user_can( 'edit_post', $id ) ) {3337		// If this attachment is unattached, attach it. Primarily a back compat thing.3338		$insert_into_post_id = (int) $_POST['post_id'];3339 3340		if ( 0 === $post->post_parent && $insert_into_post_id ) {3341			wp_update_post(3342				array(3343					'ID'          => $id,3344					'post_parent' => $insert_into_post_id,3345				)3346			);3347		}3348	}3349 3350	$url = empty( $attachment['url'] ) ? '' : $attachment['url'];3351	$rel = ( str_contains( $url, 'attachment_id' ) || get_attachment_link( $id ) === $url );3352 3353	remove_filter( 'media_send_to_editor', 'image_media_send_to_editor' );3354 3355	if ( str_starts_with( $post->post_mime_type, 'image' ) ) {3356		$align = $attachment['align'] ?? 'none';3357		$size  = $attachment['image-size'] ?? 'medium';3358		$alt   = $attachment['image_alt'] ?? '';3359 3360		// No whitespace-only captions.3361		$caption = $attachment['post_excerpt'] ?? '';3362		if ( '' === trim( $caption ) ) {3363			$caption = '';3364		}3365 3366		$title = ''; // We no longer insert title tags into <img> tags, as they are redundant.3367		$html  = get_image_send_to_editor( $id, $caption, $title, $align, $url, $rel, $size, $alt );3368	} elseif ( wp_attachment_is( 'video', $post ) || wp_attachment_is( 'audio', $post ) ) {3369		$html = stripslashes_deep( $_POST['html'] );3370	} else {3371		$html = $attachment['post_title'] ?? '';3372		$rel  = $rel ? ' rel="attachment wp-att-' . $id . '"' : ''; // Hard-coded string, $id is already sanitized.3373 3374		if ( ! empty( $url ) ) {3375			$html = '<a href="' . esc_url( $url ) . '"' . $rel . '>' . $html . '</a>';3376		}3377	}3378 3379	/** This filter is documented in wp-admin/includes/media.php */3380	$html = apply_filters( 'media_send_to_editor', $html, $id, $attachment );3381 3382	wp_send_json_success( $html );3383}

Changelog

Introduced in 3.5.0. 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.

About this page

Parsed data

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

Corrections

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