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Escape all low control characters in strings

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algo13 2016-04-13 21:48:57 +09:00 committed by Nikita Popov
parent 47b254ea51
commit 371c783344
2 changed files with 36 additions and 2 deletions
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15
lib/PhpParser/PrettyPrinter/Standard.php
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@ -849,9 +849,20 @@ class Standard extends PrettyPrinterAbstract
protected function escapeString($string, $quote) {
if (null === $quote) {
// For doc strings, don't escape newlines
return addcslashes($string, "\t\f\v$\\");
$escaped = addcslashes($string, "\t\f\v$\\");
} else {
$escaped = addcslashes($string, "\n\r\t\f\v$" . $quote . "\\");
}
return addcslashes($string, "\n\r\t\f\v$" . $quote . "\\");
// Escape other control characters
return preg_replace_callback('/([\0-\10\16-\37])(?=([0-7]?))/', function ($matches) {
$oct = decoct(ord($matches[1]));
if ($matches[2] !== '') {
// If there is a trailing digit, use the full three character form
return '\\' . str_pad($oct, 3, '0', STR_PAD_LEFT);
}
return '\\' . $oct;
}, $escaped);
}
protected function containsEndLabel($string, $label, $atStart = true, $atEnd = true) {

23
test/code/prettyPrinter/expr/stringEscaping.test Normal file
View File

@ -0,0 +1,23 @@
Escape sequences in double-quoted strings
-----
<?php
"\n\r\t\f\v\$\"\\";
"@@{ implode(range("\0", "\37")) }@@";
"\0000\0001";
<<<DOC
\n\r\t\f\v\$\"\\
@@{ implode(range("\0", "\37")) }@@
\0000\0001
DOC;
-----
"\n\r\t\f\v\$\"\\";
"\0\1\2\3\4\5\6\7\10\t\n\v\f\r\16\17\20\21\22\23\24\25\26\27\30\31\32\33\34\35\36\37";
"\0000\0001";
<<<DOC
@@{ "\n\r" }@@\t\f\v\$\\"\\
\0\1\2\3\4\5\6\7\10\t@@{ "\n" }@@\v\f@@{ "\r" }@@\16\17\20\21\22\23\24\25\26\27\30\31\32\33\34\35\36\37
\0000\0001
DOC
;