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<?php |
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/** |
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* General helpers. |
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*/ |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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class autoptimizeUtils |
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{ |
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/** |
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* Returns true when mbstring is available. |
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* |
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* @param bool|null $override Allows overriding the decision. |
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* |
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* @return bool |
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*/ |
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public static function mbstring_available( $override = null ) |
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{ |
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static $available = null; |
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|
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if ( null === $available ) { |
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$available = \extension_loaded( 'mbstring' ); |
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} |
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|
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if ( null !== $override ) { |
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$available = $override; |
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} |
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|
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return $available; |
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} |
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|
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/** |
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* Multibyte-capable strpos() if support is available on the server. |
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* If not, it falls back to using \strpos(). |
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* |
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* @param string $haystack Haystack. |
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* @param string $needle Needle. |
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* @param int $offset Offset. |
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* @param string|null $encoding Encoding. Default null. |
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* |
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* @return int|false |
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*/ |
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public static function strpos( $haystack, $needle, $offset = 0, $encoding = null ) |
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{ |
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if ( self::mbstring_available() ) { |
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return ( null === $encoding ) ? \mb_strpos( $haystack, $needle, $offset ) : \mb_strlen( $haystack, $needle, $offset, $encoding ); |
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} else { |
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return \strpos( $haystack, $needle, $offset ); |
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} |
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} |
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|
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/** |
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* Attempts to return the number of characters in the given $string if |
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* mbstring is available. Returns the number of bytes |
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* (instead of characters) as fallback. |
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* |
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* @param string $string String. |
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* @param string|null $encoding Encoding. |
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* |
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* @return int Number of charcters or bytes in given $string |
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* (characters if/when supported, bytes otherwise). |
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*/ |
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public static function strlen( $string, $encoding = null ) |
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{ |
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if ( self::mbstring_available() ) { |
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return ( null === $encoding ) ? \mb_strlen( $string ) : \mb_strlen( $string, $encoding ); |
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} else { |
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return \strlen( $string ); |
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} |
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} |
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|
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/** |
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* Our wrapper around implementations of \substr_replace() |
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* that attempts to not break things horribly if at all possible. |
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* Uses mbstring if available, before falling back to regular |
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* substr_replace() (which works just fine in the majority of cases). |
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* |
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* @param string $string String. |
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* @param string $replacement Replacement. |
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* @param int $start Start offset. |
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* @param int|null $length Length. |
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* @param string|null $encoding Encoding. |
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* |
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* @return string |
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*/ |
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public static function substr_replace( $string, $replacement, $start, $length = null, $encoding = null ) |
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{ |
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if ( self::mbstring_available() ) { |
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$strlen = self::strlen( $string, $encoding ); |
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|
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if ( $start < 0 ) { |
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if ( -$start < $strlen ) { |
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$start = $strlen + $start; |
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} else { |
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$start = 0; |
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} |
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} elseif ( $start > $strlen ) { |
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$start = $strlen; |
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} |
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|
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if ( null === $length || '' === $length ) { |
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$start2 = $strlen; |
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} elseif ( $length < 0 ) { |
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$start2 = $strlen + $length; |
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if ( $start2 < $start ) { |
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$start2 = $start; |
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} |
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} else { |
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$start2 = $start + $length; |
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} |
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|
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if ( null === $encoding ) { |
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$leader = $start ? \mb_substr( $string, 0, $start ) : ''; |
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$trailer = ( $start2 < $strlen ) ? \mb_substr( $string, $start2, null ) : ''; |
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} else { |
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$leader = $start ? \mb_substr( $string, 0, $start, $encoding ) : ''; |
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$trailer = ( $start2 < $strlen ) ? \mb_substr( $string, $start2, null, $encoding ) : ''; |
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} |
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|
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return "{$leader}{$replacement}{$trailer}"; |
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} |
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|
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return ( null === $length ) ? \substr_replace( $string, $replacement, $start ) : \substr_replace( $string, $replacement, $start, $length ); |
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} |
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|
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/** |
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* Decides whether this is a "subdirectory site" or not. |
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* |
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* @param bool $override Allows overriding the decision when needed. |
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* |
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* @return bool |
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*/ |
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public static function siteurl_not_root( $override = null ) |
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{ |
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static $subdir = null; |
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|
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if ( null === $subdir ) { |
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$parts = self::get_ao_wp_site_url_parts(); |
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$subdir = ( isset( $parts['path'] ) && ( '/' !== $parts['path'] ) ); |
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} |
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|
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if ( null !== $override ) { |
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$subdir = $override; |
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} |
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|
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return $subdir; |
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} |
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|
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/** |
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* Parse AUTOPTIMIZE_WP_SITE_URL into components using \parse_url(), but do |
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* so only once per request/lifecycle. |
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* |
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* @return array |
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*/ |
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public static function get_ao_wp_site_url_parts() |
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{ |
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static $parts = array(); |
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|
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if ( empty( $parts ) ) { |
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$parts = \parse_url( AUTOPTIMIZE_WP_SITE_URL ); |
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} |
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|
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return $parts; |
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} |
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|
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/** |
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* Modify given $cdn_url to include the site path when needed. |
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* |
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* @param string $cdn_url CDN URL to tweak. |
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* @param bool $force_cache_miss Force a cache miss in order to be able |
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* to re-run the filter. |
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* |
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* @return string |
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*/ |
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public static function tweak_cdn_url_if_needed( $cdn_url, $force_cache_miss = false ) |
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{ |
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static $results = array(); |
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|
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if ( ! isset( $results[ $cdn_url ] ) || $force_cache_miss ) { |
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|
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// In order to return unmodified input when there's no need to tweak. |
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$results[ $cdn_url ] = $cdn_url; |
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|
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// Behind a default true filter for backcompat, and only for sites |
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// in a subfolder/subdirectory, but still easily turned off if |
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// not wanted/needed... |
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if ( autoptimizeUtils::siteurl_not_root() ) { |
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$check = apply_filters( 'autoptimize_filter_cdn_magic_path_check', true, $cdn_url ); |
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if ( $check ) { |
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$site_url_parts = autoptimizeUtils::get_ao_wp_site_url_parts(); |
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$cdn_url_parts = \parse_url( $cdn_url ); |
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$schemeless = self::is_protocol_relative( $cdn_url ); |
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$cdn_url_parts = self::maybe_replace_cdn_path( $site_url_parts, $cdn_url_parts ); |
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if ( false !== $cdn_url_parts ) { |
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$results[ $cdn_url ] = self::assemble_parsed_url( $cdn_url_parts, $schemeless ); |
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} |
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} |
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} |
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} |
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|
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return $results[ $cdn_url ]; |
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} |
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|
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/** |
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* When siteurl contans a path other than '/' and the CDN URL does not have |
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* a path or it's path is '/', this will modify the CDN URL's path component |
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* to match that of the siteurl. |
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* This is to support "magic" CDN urls that worked that way before v2.4... |
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* |
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* @param array $site_url_parts Site URL components array. |
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* @param array $cdn_url_parts CDN URL components array. |
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* |
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* @return array|false |
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*/ |
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public static function maybe_replace_cdn_path( array $site_url_parts, array $cdn_url_parts ) |
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{ |
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if ( isset( $site_url_parts['path'] ) && '/' !== $site_url_parts['path'] ) { |
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if ( ! isset( $cdn_url_parts['path'] ) || '/' === $cdn_url_parts['path'] ) { |
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$cdn_url_parts['path'] = $site_url_parts['path']; |
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return $cdn_url_parts; |
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} |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Given an array or components returned from \parse_url(), assembles back |
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* the complete URL. |
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* If optional |
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* |
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* @param array $parsed_url URL components array. |
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* @param bool $schemeless Whether the assembled URL should be |
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* protocol-relative (schemeless) or not. |
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* |
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* @return string |
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*/ |
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public static function assemble_parsed_url( array $parsed_url, $schemeless = false ) |
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{ |
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$scheme = isset( $parsed_url['scheme'] ) ? $parsed_url['scheme'] . '://' : ''; |
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if ( $schemeless ) { |
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$scheme = '//'; |
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} |
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$host = isset( $parsed_url['host'] ) ? $parsed_url['host'] : ''; |
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$port = isset( $parsed_url['port'] ) ? ':' . $parsed_url['port'] : ''; |
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$user = isset( $parsed_url['user'] ) ? $parsed_url['user'] : ''; |
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$pass = isset( $parsed_url['pass'] ) ? ':' . $parsed_url['pass'] : ''; |
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$pass = ( $user || $pass ) ? "$pass@" : ''; |
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$path = isset( $parsed_url['path'] ) ? $parsed_url['path'] : ''; |
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$query = isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : ''; |
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$fragment = isset( $parsed_url['fragment'] ) ? '#' . $parsed_url['fragment'] : ''; |
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|
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return "$scheme$user$pass$host$port$path$query$fragment"; |
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} |
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|
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/** |
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* Returns true if given $url is protocol-relative. |
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* |
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* @param string $url URL to check. |
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* |
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* @return bool |
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*/ |
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public static function is_protocol_relative( $url ) |
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{ |
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$result = false; |
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|
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if ( ! empty( $url ) ) { |
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$result = ( '/' === $url{1} ); // second char is `/`. |
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} |
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|
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return $result; |
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} |
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|
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/** |
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* Canonicalizes the given path regardless of it existing or not. |
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* |
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* @param string $path Path to normalize. |
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* |
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* @return string |
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*/ |
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public static function path_canonicalize( $path ) |
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{ |
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$patterns = array( |
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'~/{2,}~', |
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'~/(\./)+~', |
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'~([^/\.]+/(?R)*\.{2,}/)~', |
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'~\.\./~', |
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); |
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$replacements = array( |
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'/', |
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'/', |
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'', |
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'', |
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); |
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|
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return preg_replace( $patterns, $replacements, $path ); |
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} |
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|
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/** |
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* Checks to see if 3rd party services are available and stores result in option |
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* |
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* @param string $return_result should we return resulting service status array (default no). |
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* |
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* @return none if $return_result is false (default), array if $return_result is true. |
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*/ |
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public static function check_service_availability( $return_result = false ) |
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{ |
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$service_availability_resp = wp_remote_get( 'https://misc.optimizingmatters.com/api/autoptimize_service_availablity.json?from=aomain&ver=' . AUTOPTIMIZE_PLUGIN_VERSION ); |
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if ( ! is_wp_error( $service_availability_resp ) ) { |
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if ( '200' == wp_remote_retrieve_response_code( $service_availability_resp ) ) { |
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$availabilities = json_decode( wp_remote_retrieve_body( $service_availability_resp ), true ); |
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if ( is_array( $availabilities ) ) { |
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update_option( 'autoptimize_service_availablity', $availabilities ); |
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if ( $return_result ) { |
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return $availabilities; |
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} |
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} |
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} |
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} |
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} |
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|
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/** |
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* Returns true if the string is a valid regex. |
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* |
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* @param string $string String, duh. |
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* |
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* @return bool |
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*/ |
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public static function str_is_valid_regex( $string ) |
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{ |
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set_error_handler( function() {}, E_WARNING ); |
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$is_regex = ( false !== preg_match( $string, '' ) ); |
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restore_error_handler(); |
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|
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return $is_regex; |
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} |
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} |
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|
