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1. List bytes and codepoints in PHP List bytes and codepoints in PHP

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   <?php

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   /*

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    * Heart emoji: ❤️

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    * UTF-8 bytes: E2 9D A4 EF B8 8F

2. Unicode and byte notation in various... Unicode and byte notation in various places and programming languages

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   # Unicode and byte notation

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   ```

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   Letter: A

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   Code points: U+0041

3. Counting UTF-8 bytes, code points an... Counting UTF-8 bytes, code points and grapheme clusters in various programming languages

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   # Counting UTF-8 bytes, code points and grapheme clusters

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   ```

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   Strings to test:

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4. Unicode code point intervals (UTF-8,... Unicode code point intervals (UTF-8, UTF-16BE and UTF-32BE)

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   UNICODE

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   • Basic plan: 63,488 valid code points

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   ┌───────────────────┬─────────┬─────────┬─────────┬───────────────────┐

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   │ Interval          │  UTF-8  │ UTF-16  │ UTF-32  │ Code points       │

5. How to disable incognito mode in you... How to disable incognito mode in your browser

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   # How to disable incognito mode in your browser

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   ## Google Chrome on Windows

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   ### Disable