[XMLProcessor] ASCII fast path for parsing names#201
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Added a blank line for better readability in comments.
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Adds support for rewriting URLs inside CSS syntax, e.g. here: ```html <div style="background-image:url(/wp-content/uploads/2025/09/image-2-766x1024.jpeg)"> ``` Before this PR, the `style` attributes in, e.g., the cover block were skipped by the URL rewriter and continued pointing to the old site. Fixes #223 ## Implementation details This PR backports `CSSProcessor`, `CSSURLProcessor`, and a few related PRs around Unicode handling from the WordPress/php-toolkit repo: * WordPress/php-toolkit#197 * WordPress/php-toolkit#195 * WordPress/php-toolkit#199 * WordPress/php-toolkit#200 * WordPress/php-toolkit#201 * WordPress/php-toolkit#202 Note the CSSProcessor and CSSURLProcessor are tested against 300 test cases containing various tricky inputs, quoted and unquoted URLs, strings, comments, unicode escape sequences, and more. ## Testing instructions This PR comes with a new test case specifically for various tricky CSS inputs. You're also welcome to try and import a WXR file that contains an inline background-image reference and confirm the URL is correctly rewritten.
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Speeds up XMLProcessor by consuming any ASCII bytes with
strspnand avoiding calls to the utf8 decoder for most tags out there. The PHPUnit test suite for WXR files It speeds up parsing the 10MB WXR file in the test set from ~1.7s on average to ~0.6s on average.This PR also moves from
utf8_codepoint_atto_wp_scan_utf8for UTF-8 decoding without any speed penalty – see #200 for prior context.cc @dmsnell