Code Modernization: Replace usage of strpos() with str_starts_with().

`str_starts_with()` was introduced in PHP 8.0 to perform a case-sensitive check indicating if the string to search in (haystack) begins with the given substring (needle).

WordPress core includes a polyfill for `str_starts_with()` on PHP < 8.0 as of WordPress 5.9.

This commit replaces `0 === strpos( ... )` with `str_starts_with()` in core files, making the code more readable and consistent, as well as improving performance.

While `strpos()` is slightly faster than the polyfill on PHP < 8.0, `str_starts_with()` is noticeably faster on PHP 8.0+, as it is optimized to avoid unnecessarily searching along the whole haystack if it does not find the needle.

Follow-up to [52039], [52040], [52326].

Props spacedmonkey, costdev, sabernhardt, mukesh27, desrosj, jorbin, TobiasBg, ayeshrajans, lgadzhev, SergeyBiryukov.
Fixes #58012.

git-svn-id: https://develop.svn.wordpress.org/trunk@55703 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Sergey Biryukov
2023-05-02 15:43:03 +00:00
parent 73dbbe5372
commit 4cb3e1582a
54 changed files with 105 additions and 105 deletions

View File

@@ -457,7 +457,7 @@ function search_theme_directories( $force = false ) {
* to use in get_theme_root().
*/
foreach ( $wp_theme_directories as $theme_root ) {
if ( 0 === strpos( $theme_root, WP_CONTENT_DIR ) ) {
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$relative_theme_roots[ str_replace( WP_CONTENT_DIR, '', $theme_root ) ] = $theme_root;
} else {
$relative_theme_roots[ $theme_root ] = $theme_root;
@@ -634,11 +634,11 @@ function get_theme_root_uri( $stylesheet_or_template = '', $theme_root = '' ) {
if ( $stylesheet_or_template && $theme_root ) {
if ( in_array( $theme_root, (array) $wp_theme_directories, true ) ) {
// Absolute path. Make an educated guess. YMMV -- but note the filter below.
if ( 0 === strpos( $theme_root, WP_CONTENT_DIR ) ) {
if ( str_starts_with( $theme_root, WP_CONTENT_DIR ) ) {
$theme_root_uri = content_url( str_replace( WP_CONTENT_DIR, '', $theme_root ) );
} elseif ( 0 === strpos( $theme_root, ABSPATH ) ) {
} elseif ( str_starts_with( $theme_root, ABSPATH ) ) {
$theme_root_uri = site_url( str_replace( ABSPATH, '', $theme_root ) );
} elseif ( 0 === strpos( $theme_root, WP_PLUGIN_DIR ) || 0 === strpos( $theme_root, WPMU_PLUGIN_DIR ) ) {
} elseif ( str_starts_with( $theme_root, WP_PLUGIN_DIR ) || str_starts_with( $theme_root, WPMU_PLUGIN_DIR ) ) {
$theme_root_uri = plugins_url( basename( $theme_root ), $theme_root );
} else {
$theme_root_uri = $theme_root;