関数 wp_check_invalid_utf8()
2014/12/11
関数 wp_check_invalid_utf8()
定義ファイル :/blog/wp-includes/formatting.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | function wp_check_invalid_utf8( $string, $strip = false ) { $string = (string) $string; if ( 0 === strlen( $string ) ) { return ''; } // Store the site charset as a static to avoid multiple calls to get_option() static $is_utf8; if ( !isset( $is_utf8 ) ) { $is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ); } if ( !$is_utf8 ) { return $string; } // Check for support for utf8 in the installed PCRE library once and store the result in a static static $utf8_pcre; if ( !isset( $utf8_pcre ) ) { $utf8_pcre = @preg_match( '/^./u', 'a' ); } // We can't demand utf8 in the PCRE installation, so just return the string in those cases if ( !$utf8_pcre ) { return $string; } // preg_match fails when it encounters invalid UTF8 in $string if ( 1 === @preg_match( '/^./us', $string ) ) { return $string; } // Attempt to strip the bad chars if requested (not recommended) if ( $strip && function_exists( 'iconv' ) ) { return iconv( 'utf-8', 'utf-8', $string ); } return ''; } |