echo "<pre>";
var_dump(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES | ENT_HTML5));
echo "</pre>";
/*
run:
array(1511) {
[" "]=>
string(5) "	"
["
"]=>
string(9) "
"
["!"]=>
string(6) "!"
["""]=>
string(6) """
["#"]=>
string(5) "#"
["$"]=>
string(8) "$"
["%"]=>
string(8) "%"
["&"]=>
string(5) "&"
["'"]=>
string(6) "'"
["("]=>
string(6) "("
[")"]=>
string(6) ")"
["*"]=>
string(5) "*"
["+"]=>
string(6) "+"
[","]=>
string(7) ","
["."]=>
string(8) "."
["/"]=>
string(5) "/"
[":"]=>
string(7) ":"
[";"]=>
string(6) ";"
["<"]=>
string(4) "<"
...
*/