Prevent runaway escapes in php string.

Fixes #1184

2 files changed, 37 insertions, 1 deletions

diff --git a/pygments/lexers/php.py b/pygments/lexers/php.py
index 2421738f..1931325a 100644
--- a/pygments/lexers/php.py
+++ b/pygments/lexers/php.py
@@ -224,7 +224,7 @@ class PhpLexer(RegexLexer):
                       String.Interpol)),
             (r'(\$\{)(\S+)(\})',
              bygroups(String.Interpol, Name.Variable, String.Interpol)),
-            (r'[${\\]+', String.Double)
+            (r'[${\\]', String.Double)
         ],
     }
 
diff --git a/tests/test_php.py b/tests/test_php.py
new file mode 100644
index 00000000..050ca70d
--- /dev/null
+++ b/tests/test_php.py
@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+"""
+    PHP Tests
+    ~~~~~~~~~
+
+    :copyright: Copyright 2006-2015 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import unittest
+
+from pygments.lexers import PhpLexer
+from pygments.token import Token
+
+
+class PhpTest(unittest.TestCase):
+    def setUp(self):
+        self.lexer = PhpLexer()
+
+    def testStringEscapingRun(self):
+        fragment = '<?php $x="{\\""; ?>\n'
+        tokens = [
+            (Token.Comment.Preproc, '<?php'),
+            (Token.Text, ' '),
+            (Token.Name.Variable, '$x'),
+            (Token.Operator, '='),
+            (Token.Literal.String.Double, '"'),
+            (Token.Literal.String.Double, '{'),
+            (Token.Literal.String.Escape, '\\"'),
+            (Token.Literal.String.Double, '"'),
+            (Token.Punctuation, ';'),
+            (Token.Text, ' '),
+            (Token.Comment.Preproc, '?>'),
+            (Token.Other, '\n'),
+        ]
+        self.assertEqual(tokens, list(self.lexer.get_tokens(fragment)))