diff --git a/trunk_lexer/src/lexer.rs b/trunk_lexer/src/lexer.rs
index 366c332..5bba1c4 100644
--- a/trunk_lexer/src/lexer.rs
+++ b/trunk_lexer/src/lexer.rs
@@ -202,10 +202,18 @@ impl Lexer {
                 self.next();
                 self.tokenize_single_quote_string()?
             }
+            [b'b' | b'B', b'\'', ..] => {
+                self.skip(2);
+                self.tokenize_single_quote_string()?
+            }
             [b'"', ..] => {
                 self.next();
                 self.tokenize_double_quote_string()?
             }
+            [b'b' | b'B', b'"', ..] => {
+                self.skip(2);
+                self.tokenize_double_quote_string()?
+            }
             [b'$', ..] => {
                 self.next();
                 self.tokenize_variable()
@@ -909,6 +917,18 @@ string.'"#,
         );
     }
 
+    #[test]
+    fn binary_strings() {
+        assert_tokens(
+            r#"<?php b'single' b"double" "#,
+            &[
+                open!(),
+                TokenKind::ConstantString("single".into()),
+                TokenKind::ConstantString("double".into()),
+            ],
+        )
+    }
+
     #[test]
     fn string_escapes() {
         assert_tokens(