1<?php
2
3'foobar';
4"foo\"bar";
5"foobar\n";
6"'foobar'";
7"foo{$bar}";
8'foo"bar"';
9pht(
10  "This string requires \x12\x34 double quotes, but ".
11  "this string does not. Here, they are used for consistency.");
12pht(
13  "This string also requires \123\345 double quotes, but ".
14  "this string does not. Here, they are used for consistency.");
15~~~~~~~~~~
16advice:4:1:XHP41:Unnecessary Double Quotes
17~~~~~~~~~~
18<?php
19
20'foobar';
21'foo"bar';
22"foobar\n";
23"'foobar'";
24"foo{$bar}";
25'foo"bar"';
26pht(
27  "This string requires \x12\x34 double quotes, but ".
28  "this string does not. Here, they are used for consistency.");
29pht(
30  "This string also requires \123\345 double quotes, but ".
31  "this string does not. Here, they are used for consistency.");
32