has_shortcode( string $content, string $tag ): bool
- Since
- 3.6.0
- Source
wp-includes/shortcodes.php:149
Compatibility
- WordPress
- since 3.6.0
- 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.
Parameters
$contentstring- Content to search for shortcodes.
$tagstring- Shortcode tag to check.
Return value
bool- Whether the passed content contains the given shortcode.
Performance profile
How much work a call to has_shortcode() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 5–36
- Plugin surface
- None
- Called by
- 3
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 42.
Nothing here hands control to plugin code.
3 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- regexregular expression over the whole input
preg_match_all()called directly
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost has_shortcode() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!$content | 5 | none |
$content && !shortcode_exists() | 9 | shortcode_exists() |
$content && shortcode_exists() | 21–27 | shortcode_exists(), get_shortcode_regex(), preg_match_all() |
$content && shortcode_exists() && !empty($matches) && !$matches && $tag !== false && !empty($shortcode) && has_shortcode() | 36 | shortcode_exists(), get_shortcode_regex(), preg_match_all(), has_shortcode() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 42 | 5–36 | 8 | |
| 8.5 | 42 | 5–36 | 8 | |
| 8.4 | 42 | 5–36 | 8 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 45 | 8–39 | 8 | |
| 8.2 | 45 | 8–39 | 8 | |
| 8.1 | 45 | 8–39 | 8 | |
| 7.4 | 45 | 8–39 | 8 |
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 · 4
- str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
- shortcode_exists()Determines whether a registered shortcode exists named $tag.
- get_shortcode_regex()Retrieves the shortcode regular expression for searching.
- has_shortcode()Determines whether the passed content contains the specified shortcode.
Used by · 3
- get_post_galleries()Retrieves galleries from the passed post's content.
- has_shortcode()Determines whether the passed content contains the specified shortcode.
- wp_ajax_parse_embed()Applies [embed] Ajax handlers to a string.
Source code
function has_shortcode( $content, $tag ) { if ( ! str_contains( $content, '[' ) ) { return false; } if ( shortcode_exists( $tag ) ) { preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER ); if ( empty( $matches ) ) { return false; } foreach ( $matches as $shortcode ) { if ( $tag === $shortcode[2] ) { return true; } elseif ( ! empty( $shortcode[5] ) && has_shortcode( $shortcode[5], $tag ) ) { return true; } } } return false;}Changelog
Introduced in 3.6.0. 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 6.9.7 tag, from
src/wp-includes/shortcodes.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
- Something wrong on this page? Report it and it gets fixed in the next regeneration.