add php syntax

.vscode/settings.json

@@ -24,6 +24,8 @@
     "**/fixtures/json-*.js": "javascript",
     "**/fixtures/makefile-*": "makefile",
     "**/fixtures/makefile-*.js": "javascript",
+    "**/fixtures/php-*": "php",
+    "**/fixtures/php-*.js": "javascript",
     "**/fixtures/py-*": "python",
     "**/fixtures/py-*.js": "javascript",
     "**/fixtures/rb-*": "ruby",

README.md

@@ -16,7 +16,7 @@ Moondust is crafted to reduce eye strain, allowing to focus on code. It challeng
 
 For a more in-depth discussion on the issues associated with the conventional approach to syntax highlighting, recommend reading the articles [A case against syntax highlighting] and [Syntax highlighting is a waste of an information channel].
 
-Moondust is tailored for each syntax individually. At present, it supports [CSS], [Dockerfile], [fish], [Go], [Go Module], [Go Sum], [HTML], [INI], [JavaScript], [JSON], [JSON with Comments], [JSON Lines], [JSX], [Makefile], [Python], [Ruby], [Rust], [Shell Script], [SQL], [Swift], [TOML], [TypeScript], [TSX], and [YAML].
+Moondust is tailored for each syntax individually. At present, it supports [CSS], [Dockerfile], [fish], [Go], [Go Module], [Go Sum], [HTML], [INI], [JavaScript], [JSON], [JSON with Comments], [JSON Lines], [JSX], [Makefile], [PHP], [Python], [Ruby], [Rust], [Shell Script], [SQL], [Swift], [TOML], [TypeScript], [TSX], and [YAML].
 
 In the [initial phase], Moondust was primarily a modification of the [GitHub Theme]. I owe a great deal of gratitude to the Primer team for their work.
 
@@ -51,6 +51,7 @@ A special shout-out goes to the entire community that focuses on creating minima
 [JSON Lines]: https://moondustthe.me/#jsonl
 [JSX]: https://moondustthe.me/#jsx
 [Makefile]: https://moondustthe.me/#makefile
+[PHP]: https://moondustthe.me/#php
 [Python]: https://moondustthe.me/#py
 [Ruby]: https://moondustthe.me/#rb
 [Rust]: https://moondustthe.me/#rs

fixtures/php-00

@@ -0,0 +1,137 @@
+#!
+
+<?php
+
+// c
+# c
+/* c */
+
+include "s"
+include 's'
+include `s`
+
+;
+
+"s"
+'s'
+`s`
+
+"/s{5}/"
+'/s{5}/'
+
+<<<EOD
+s
+EOD
+
+<<<'EOD'
+s
+EOD
+
+true
+false
+
+0
+0.0
+0b0
+0x0
+0o0
+
+$a
+
+$a+$a
+$a+=$a
+$a>$a
+$a~$a
+$a++
+$a??$a
+$a->a
+...$a
+?$a:$a
+$a.$a
+
+&&
+
+[$a,$a]
+{$a=>$a}
+
+a:
+goto a
+
+continue
+declare
+default
+die
+do
+else
+elseif
+enddeclare
+endfor
+endforeach
+endif
+endswitch
+endwhile
+exit
+for
+foreach
+if
+return
+while
+yield
+yield from
+
+@$a
+
+use a as a;
+use a {
+	insteadof a;
+}
+
+if ($a instanceof a) {}
+
+switch ($a) {
+case $a:
+	break
+}
+
+try {
+	throw
+} catch () {
+} finally {}
+
+match () {
+	200 => $a,
+	default => $a
+}
+
+enum a {
+	case a
+}
+
+function a(?int $a, &$a, ...$a): never {}
+fn() => $a
+a()
+array(a)
+
+class a extends {}
+class a implements {}
+
+class a {
+	public $a
+}
+
+abstract class a {}
+final class a {}
+
+new a()
+
+$a::class
+
+trait a {}
+namespace a {}
+interface a {}
+
+clone $a
+print $a
+echo $a
+
+?>

fixtures/php-00.js

@@ -0,0 +1,137 @@
+c0("#!")
+
+p0("<?php")
+
+c0("// c")
+c0("# c")
+c0("/* c */")
+
+p0('include "'), p1("s"), p0('"')
+p0("include '"), p1("s"), p0("'")
+p0("include `"), p1("s"), p0("`")
+
+p0(";")
+
+s0('"'), s1("s"), s0('"')
+s0("'"), s1("s"), s0("'")
+s0("`"), s1("s"), s0("`")
+
+s0('"/'), s1("s{5}"), s0('/"')
+s0("'/"), s1("s{5}"), s0("/'")
+
+s0("<<<EOD")
+s1("s")
+s0("EOD")
+
+s0("<<<"), s1("'"), s0("EOD"), s1("'")
+s1("s")
+s0("EOD")
+
+p1("true")
+p1("false")
+
+p1("0")
+p1("0"), p0("."), p1("0")
+p1("0b0")
+p1("0x0")
+p1("0o0")
+
+p0("$"), p1("a")
+
+p0("$"), p1("a"), p0("+$"), p1("a")
+p0("$"), p1("a"), p0("+=$"), p1("a")
+p0("$"), p1("a"), p0(">$"), p1("a")
+p0("$"), p1("a"), p0("~$"), p1("a")
+p0("$"), p1("a"), p0("++")
+p0("$"), p1("a"), p0("??$"), p1("a")
+p0("$"), p1("a"), p0("->"), p1("a")
+p0("...$"), p1("a")
+p0("?$"), p1("a"), p0(":$"), p1("a")
+p0("$"), p1("a"), p0(".$"), p1("a")
+
+p0("&&")
+
+p0("[$"), p1("a"), p0(",$"), p1("a"), p0("]")
+p0("{$"), p1("a"), p0("=>$"), p1("a"), p0("}")
+
+p1("a:")
+p0("goto"), p1("a")
+
+p0("continue")
+p0("declare")
+p0("default")
+p0("die")
+p0("do")
+p0("else")
+p0("elseif")
+p0("enddeclare")
+p0("endfor")
+p0("endforeach")
+p0("endif")
+p0("endswitch")
+p0("endwhile")
+p0("exit")
+p0("for")
+p0("foreach")
+p0("if")
+p0("return")
+p0("while")
+p0("yield")
+p0("yield from")
+
+p0("@$"), p1("a")
+
+p0("use"), p1("a"), p0("as"), p1("a"), p0(";")
+p0("use"), p1("a"), p0("{")
+  p0("insteadof"), p1("a"), p0(";")
+p0("}")
+
+p0("if ($"), p1("a"), p0("instanceof"), p1("a"), p0(") {}")
+
+p0("switch ($"), p1("a"), p0(") {")
+p0("case $"), p1("a"), p0(":")
+  p0("break")
+p0("}")
+
+p0("try {")
+	p0("throw")
+p0("} catch () {")
+p0("} finally {}")
+
+p0("match () {")
+	p1("200"), p0("=> $"), p1("a"), p0(",")
+	p0("default => $"), p1("a")
+p0("}")
+
+p0("enum"), p1("a"), p0("{")
+	p0("case"), p1("a")
+p0("}")
+
+p0("function"), p1("a"), p0("(?int $"), p1("a"), p0(", &$"), p1("a"), p0(", ...$"), p1("a"), p0("): never {}")
+p0("fn() => $"), p1("a")
+p1("a"), p0("()")
+p1("array"), p0("("), p1("a"), p0(")")
+
+p0("class"), p1("a"), p0("extends {}")
+p0("class"), p1("a"), p0("implements {}")
+
+p0("class"), p1("a"), p0("{")
+  p0("public $"), p1("a")
+p0("}")
+
+p0("abstract class"), p1("a"), p0("{}")
+p0("final class"), p1("a"), p0("{}")
+
+p0("new"), p1("a"), p0("()")
+
+p0("$"), p1("a"), p0("::"), p1("class")
+
+p0("trait"), p1("a"), p0("{}")
+p0("namespace"), p1("a"), p0("{}")
+p0("interface"), p1("a"), p0("{}")
+
+p0("clone $"), p1("a")
+p0("print $"), p1("a")
+p0("echo $"), p1("a")
+
+p0("?>")

fixtures/php-01

@@ -0,0 +1,9 @@
+<?php
+
+// PHP grammar has no rule for the colon after the label.
+a:
+
+// PHP grammar has no rule for quotes around the label in the nowdoc.
+<<<'EOD'
+s
+EOD

grammar.js

@@ -254,6 +254,14 @@ function configs() {
         "https://github.com/microsoft/vscode/blob/1.87.0/extensions/make/syntaxes/make.tmLanguage.json/",
       ],
     },
+    {
+      id: "php",
+      scope: "text.html.php",
+      files: [
+        "https://github.com/microsoft/vscode/blob/1.95.3/extensions/php/syntaxes/html.tmLanguage.json/",
+        "https://github.com/microsoft/vscode/blob/1.95.3/extensions/php/syntaxes/php.tmLanguage.json/",
+      ],
+    },
     {
       id: "py",
       scope: "source.python",