_print_emoji_detection_script()
- Since
- 4.6.0
- Source
wp-includes/formatting.php:6023
Compatibility
- WordPress
- since 4.6.0
- 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.
Performance profile
How much work a call to _print_emoji_detection_script() 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
- Scaling
- Constant
- Instructions
- 74–85
- Plugin surface
- 5 hooks
- Called by
- 1
Reads or writes the filesystem via file_get_contents().
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 97.
Third-party callbacks on 'emoji_url', 'emoji_ext', 'emoji_svg_url' run inside this call, and their cost is not bounded by anything here.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()called directly - filesystemfilesystem access
file_get_contents()called directly - optionoption read or write
get_option()one call below _print_emoji_detection_script()
Further down the call graph this can also reach 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 _print_emoji_detection_script() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 74 | apply_filters(), apply_filters(), apply_filters(), apply_filters(), get_bloginfo(), includes_url(), apply_filters(), wp_json_encode(), wp_print_inline_script_tag(), wp_scripts_get_suffix(), file_get_contents(), rtrim(), includes_url(), esc_url_raw(), wp_print_inline_script_tag() |
| always | 85 | apply_filters(), apply_filters(), apply_filters(), apply_filters(), get_bloginfo(), includes_url(), apply_filters(), includes_url(), apply_filters(), wp_json_encode(), wp_print_inline_script_tag(), wp_scripts_get_suffix(), file_get_contents(), rtrim(), includes_url(), esc_url_raw(), wp_print_inline_script_tag() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 97 instructions, 74–85 executed per call, 1 branch. 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 · 7
7 hooks fire while _print_emoji_detection_script() runs, in this order:
- apply_filters( emoji_url )filterline 6032 (+9 into the body)
Filters the URL where emoji png images are hosted.
- apply_filters( emoji_ext )filterline 6041 (+18 into the body)
Filters the extension of the emoji png files.
- apply_filters( emoji_svg_url )filterline 6050 (+27 into the body)
Filters the URL where emoji SVG images are hosted.
- apply_filters( emoji_svg_ext )filterline 6059 (+36 into the body)
Filters the extension of the emoji SVG files.
- apply_filters( script_loader_src )filterline 6067 (+44 into the body)
Filters the script loader source.
- apply_filters( script_loader_src )filterline 6069 (+46 into the body)
Filters the script loader source.
- apply_filters( script_loader_src )filterline 6074 (+51 into the body)
Filters the script loader source.
Uses · 7
- apply_filters()Calls the callback functions that have been added to a filter hook.
- get_bloginfo()Retrieves information about the current site.
- includes_url()Retrieves the URL to the includes directory.
- wp_print_inline_script_tag()Prints an inline script tag.
- wp_json_encode()Encodes a variable into JSON, with some confidence checks.
- wp_scripts_get_suffix()Returns the suffix that can be used for the scripts.
- esc_url_raw()Sanitizes a URL for database or redirect usage.
Used by · 1
- print_emoji_detection_script()Prints the inline Emoji detection script if it is not already printed.
Source code
function _print_emoji_detection_script() { $settings = array( /** * Filters the URL where emoji png images are hosted. * * @since 4.2.0 * * @param string $url The emoji base URL for png images. */ 'baseUrl' => apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/17.0.2/72x72/' ), /** * Filters the extension of the emoji png files. * * @since 4.2.0 * * @param string $extension The emoji extension for png files. Default .png. */ 'ext' => apply_filters( 'emoji_ext', '.png' ), /** * Filters the URL where emoji SVG images are hosted. * * @since 4.6.0 * * @param string $url The emoji base URL for svg images. */ 'svgUrl' => apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/17.0.2/svg/' ), /** * Filters the extension of the emoji SVG files. * * @since 4.6.0 * * @param string $extension The emoji extension for svg files. Default .svg. */ 'svgExt' => apply_filters( 'emoji_svg_ext', '.svg' ), ); $version = 'ver=' . get_bloginfo( 'version' ); if ( SCRIPT_DEBUG ) { $settings['source'] = array( /** This filter is documented in wp-includes/class-wp-scripts.php */ 'wpemoji' => apply_filters( 'script_loader_src', includes_url( "js/wp-emoji.js?$version" ), 'wpemoji' ), /** This filter is documented in wp-includes/class-wp-scripts.php */ 'twemoji' => apply_filters( 'script_loader_src', includes_url( "js/twemoji.js?$version" ), 'twemoji' ), ); } else { $settings['source'] = array( /** This filter is documented in wp-includes/class-wp-scripts.php */ 'concatemoji' => apply_filters( 'script_loader_src', includes_url( "js/wp-emoji-release.min.js?$version" ), 'concatemoji' ), ); } wp_print_inline_script_tag( wp_json_encode( $settings, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ), array( 'id' => 'wp-emoji-settings', 'type' => 'application/json', ) ); $emoji_loader_script_path = '/js/wp-emoji-loader' . wp_scripts_get_suffix() . '.js'; wp_print_inline_script_tag( rtrim( file_get_contents( ABSPATH . WPINC . $emoji_loader_script_path ) ) . "\n" . '//# sourceURL=' . esc_url_raw( includes_url( $emoji_loader_script_path ) ), array( 'type' => 'module', ) );}Changelog
Introduced in 4.6.0. 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 7.1.0 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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