<div class="foo"></div>
----------------------------------------------------
[
["markup", [
["tag", [
["tag", [
["punctuation", "<"],
"div"
]],
["attr-name", [
"class"
]],
["attr-value", [
["punctuation", "="],
["punctuation", "\""],
"foo",
["punctuation", "\""]
]],
["punctuation", ">"]
]]
]],
["markup", [
["tag", [
["tag", [
["punctuation", "</"],
"div"
]],
["punctuation", ">"]
]]
]]
]
----------------------------------------------------
Checks for markup in PHP.