<<<FOO_BAR
Heredoc string
FOO_BAR;
<<<"FOO"
	some
	content
FOO;
<<<'NOWDOC'
This is a nowdoc string
NOWDOC;
"https://example.com"
" /* not a comment */ "
"multi-line
string"
'multi-line
string'
`multi-line
shell exec string`

----------------------------------------------------

[
	["string", [
		["delimiter", [
			["punctuation", "<<<"], "FOO_BAR"
		]],
		"\r\nHeredoc string\r\n",
		["delimiter", [
			"FOO_BAR", ["punctuation", ";"]
		]]
	]],
	["string", [
		["delimiter", [
			["punctuation", "<<<\""], "FOO", ["punctuation", "\""]
		]],
		"\r\n\tsome\r\n\tcontent\r\n",
		["delimiter", [
			"FOO", ["punctuation", ";"]
		]]
	]],
	["string", [
		["delimiter", [
			["punctuation", "<<<'"], "NOWDOC", ["punctuation", "'"]
		]],
		"\r\nThis is a nowdoc string\r\n",
		["delimiter", [
			"NOWDOC", ["punctuation", ";"]
		]]
	]],
	["string", ["\"https://example.com\""]],
	["string", ["\" /* not a comment */ \""]],
	["string", ["\"multi-line\r\nstring\""]],
	["string", "'multi-line\r\nstring'"],
	["string", "`multi-line\r\nshell exec string`"]
]

----------------------------------------------------

Checks for strings.