Revert "Define encoding of PHP scripts"

This reverts commit f35bd70.

Author: nikic

spec/05-types.md

@@ -128,10 +128,10 @@ str-whitespace::
 
 str-whitespace-char::
   new-line
-  "Space character (0x20)"
-  "Horizontal-tab character (0x09)"
-  "Vertical-tab character (0x0B)"
-  "Form-feed character (0x0C)"
+  "Space character (U+0020)"
+  "Horizontal-tab character (U+0009)"
+  "Vertical-tab character (U+000B)"
+  "Form-feed character (U+000C)"
 
 str-number::
   digit-sequence
@@ -147,10 +147,10 @@ str-number::
 
 <i id="grammar-str-whitespace-char">str-whitespace-char::</i>
    <i><a href="09-lexical-structure.md#grammar-new-line">new-line</a></i>
-   Space character (0x20)
-   Horizontal-tab character (0x09)
-   Vertical-tab character (0x0B)
-   Form-feed character (0x0C)
+   Space character (U+0020)
+   Horizontal-tab character (U+0009)
+   Vertical-tab character (U+000B)
+   Form-feed character (U+000C)
 
 <i id="grammar-str-number">str-number::</i>
    <i><a href="09-lexical-structure.md#grammar-digit-sequence">digit-sequence</a></i>

spec/09-lexical-structure.md

@@ -145,9 +145,9 @@ input-character::
   "Any source character except" new-line
 
 new-line::
-  "Carriage-return character (0x0D)"
-  "Line-feed character (0x0A)"
-  "Carriage-return character (0x0D) followed by line-feed character (0x0A)"
+  "Carriage-return character (U+000D)"
+  "Line-feed character (U+000A)"
+  "Carriage-return character (U+000D) followed by line-feed character (U+000A)"
 
 delimited-comment::
   '/*' "No characters or any source character sequence except */" '*/'
@@ -170,9 +170,9 @@ delimited-comment::
    Any source character except   <i><a href="#grammar-new-line">new-line</a></i>
 
 <i id="grammar-new-line">new-line::</i>
-   Carriage-return character (0x0D)
-   Line-feed character (0x0A)
-   Carriage-return character (0x0D) followed by line-feed character (0x0A)
+   Carriage-return character (U+000D)
+   Line-feed character (U+000A)
+   Carriage-return character (U+000D) followed by line-feed character (U+000A)
 
 <i id="grammar-delimited-comment">delimited-comment::</i>
    /*   No characters or any source character sequence except */   */
@@ -212,8 +212,8 @@ white-space::
 
 white-space-character::
   new-line
-  "Space character (0x20)"
-  "Horizontal-tab character (0x09)"
+  "Space character (U+0020)"
+  "Horizontal-tab character (U+0009)"
 -->
 
 <pre>
@@ -223,8 +223,8 @@ white-space-character::
 
 <i id="grammar-white-space-character">white-space-character::</i>
    <i><a href="#grammar-new-line">new-line</a></i>
-   Space character (0x20)
-   Horizontal-tab character (0x09)
+   Space character (U+0020)
+   Horizontal-tab character (U+0009)
 </pre>
 
 **Semantics**
@@ -290,7 +290,7 @@ name::
 
 name-nondigit::
   nondigit
-  "one of the characters 0x80–0xff"
+  "one of the characters U+0080–U+00ff"
 
 nondigit:: one of
   '_'
@@ -324,7 +324,7 @@ nondigit:: one of
 
 <i id="grammar-name-nondigit">name-nondigit::</i>
    <i><a href="#grammar-nondigit">nondigit</a></i>
-   one of the characters 0x80–0xff
+   one of the characters U+0080–U+00ff
 
 <i id="grammar-nondigit">nondigit:: one of</i>
    _
@@ -344,7 +344,7 @@ Names are used to identify the following: [constants](06-constants.md#general),
 and names in [heredoc](#heredoc-string-literals) and [nowdoc comments](#nowdoc-string-literals).
 
 A *name* begins with an underscore (_), *name-nondigit*, or extended
-name character in the range 0x80–-0xff. Subsequent characters can
+name character in the range U+0080–-U+00ff. Subsequent characters can
 also include *digits*. A *variable name* is a name with a leading
 dollar ($).
 
@@ -704,7 +704,7 @@ b-prefix:: one of
 **Semantics**
 
 A single-quoted string literal is a string literal delimited by
-single-quotes (`'`, 0x27). The literal can contain any source character except
+single-quotes (`'`, U+0027). The literal can contain any source character except
 single-quote (`'`) and backslash (`\\`), which can only be represented by
 their corresponding escape sequence.
 
@@ -807,7 +807,7 @@ codepoint-digits::
 **Semantics**
 
 A double-quoted string literal is a string literal delimited by
-double-quotes (`"`, 0x22). The literal can contain any source character except
+double-quotes (`"`, U+0022). The literal can contain any source character except
 double-quote (`"`) and backslash (`\\`), which can only be represented by
 their corresponding escape sequence. Certain other (and sometimes
 non-printable) characters can also be expressed as escape sequences.
@@ -821,15 +821,15 @@ in the table below:
 
 Escape sequence | Character name | Unicode character
 --------------- | --------------| ------
-\$  | Dollar sign | 0x24
-\"  | Double quote | 0x22
-\\  | Backslash | 0x5C
-\e  | Escape | 0x1B
-\f  | Form feed | 0x0C
-\n  | New line | 0x0A
-\r  | Carriage Return | 0x0D
-\t  | Horizontal Tab | 0x09
-\v  | Vertical Tab | 0x0B
+\$  | Dollar sign | U+0024
+\"  | Double quote | U+0022
+\\  | Backslash | U+005C
+\e  | Escape | U+001B
+\f  | Form feed | U+000C
+\n  | New line | U+000A
+\r  | Carriage Return | U+000D
+\t  | Horizontal Tab | U+0009
+\v  | Vertical Tab | U+000B
 \ooo |  1–3-digit octal digit value ooo
 \xhh or \Xhh  | 1–2-digit hexadecimal digit value hh
 \u{xxxxxx} | UTF-8 encoding of Unicode codepoint U+xxxxxx | U+xxxxxx

spec/10-expressions.md

@@ -1428,7 +1428,7 @@ shell-command-expression:
    `   <i><a href="09-lexical-structure.md#grammar-dq-char-sequence">dq-char-sequence</a></i><sub>opt</sub>   `
 </pre>
 
-where \` is the GRAVE ACCENT character 0x60, commonly referred to as a
+where \` is the GRAVE ACCENT character U+0060, commonly referred to as a
 *backtick*.
 
 **Semantics**
@@ -2804,9 +2804,9 @@ character from the right-hand operand is stored at the designated
 location; all other characters in the right-hand operand string are
 ignored.  If the designated location is beyond the end of the
 destination string, that string is extended to the new length with
-spaces (0x20) added as padding beyond the old end and before the newly
+spaces (U+0020) added as padding beyond the old end and before the newly
 added character. If the right-hand operand is an empty string, the null
-character \\0 (0x00) is stored.
+character \\0 (U+0000) is stored.
 
 **Examples**
 

spec/19-grammar.md

@@ -3,9 +3,6 @@
 ## General
 
 The grammar notation is described in [Grammars section](09-lexical-structure.md#grammars).
-PHP scripts are encoded as ASCII, but bytes 0x80 to 0xFF are allowed in some places, as defined in the grammar. 
-PHP scripts are parsed as a series of 8-bit bytes, rather than code points from Unicode or any other character repertoire. 
-Within this specification, bytes are represented by their ASCII interpretations where these are printable characters.
 
 ## Lexical Grammar
 
@@ -35,9 +32,9 @@ Within this specification, bytes are represented by their ASCII interpretations
    Any source character except   <i><a href="#grammar-new-line">new-line</a></i>
 
 <i id="grammar-new-line">new-line::</i>
-   Carriage-return character (0x0D)
-   Line-feed character (0x0A)
-   Carriage-return character (0x0D) followed by line-feed character (0x0A)
+   Carriage-return character (U+000D)
+   Line-feed character (U+000A)
+   Carriage-return character (U+000D) followed by line-feed character (U+000A)
 
 <i id="grammar-delimited-comment">delimited-comment::</i>
    /*   No characters or any source character sequence except */   */
@@ -48,8 +45,8 @@ Within this specification, bytes are represented by their ASCII interpretations
 
 <i id="grammar-white-space-character">white-space-character::</i>
    <i><a href="#grammar-new-line">new-line</a></i>
-   Space character (0x20)
-   Horizontal-tab character (0x09)
+   Space character (U+0020)
+   Horizontal-tab character (U+0009)
 
 <i id="grammar-token">token::</i>
    <i><a href="#grammar-variable-name">variable-name</a></i>
@@ -83,7 +80,7 @@ Within this specification, bytes are represented by their ASCII interpretations
 
 <i id="grammar-name-nondigit">name-nondigit::</i>
    <i><a href="#grammar-nondigit">nondigit</a></i>
-   one of the characters 0x80–0xff
+   one of the characters U+0080–U+00ff
 
 <i id="grammar-nondigit">nondigit:: one of</i>
    _

tests/lexical_structure/unicode_string_escape_sequence/unicode_escape.phpt

@@ -3,7 +3,7 @@ PHP Spec test generated from ./lexical_structure/unicode_string_escape_sequence/
 --FILE--
 <?php
 
-var_dump("\u{61}"); // ASCII "a" - characters below 0x7F just encode as ASCII, as it's UTF-8
+var_dump("\u{61}"); // ASCII "a" - characters below U+007F just encode as ASCII, as it's UTF-8
 var_dump("\u{FF}"); // y with diaeresis
 var_dump("\u{ff}"); // case-insensitive
 var_dump("\u{2603}"); // Unicode snowman