ext/pdo_pgsql: Speed up the SQL scanner

UPGRADING

@@ -134,3 +134,7 @@ PHP 8.7 UPGRADE NOTES
 
 - MBString:
   . Improved performance of mb_strlen for UTF-8 strings.
+
+- PDO_PGSQL:
+  . Improved performance of the SQL parser that handles placeholders in
+    PDO::prepare() and, with emulated prepares, PDOStatement::execute().

ext/pdo_pgsql/Makefile.frag

@@ -1,7 +1,7 @@
 $(srcdir)/pgsql_sql_parser.c: $(srcdir)/pgsql_sql_parser.re
 	@(cd $(top_srcdir); \
 	if test -f ./pgsql_sql_parser.re; then \
-		$(RE2C) $(RE2C_FLAGS) -o pgsql_sql_parser.c pgsql_sql_parser.re; \
+		$(RE2C) $(RE2C_FLAGS) -b -o pgsql_sql_parser.c pgsql_sql_parser.re; \
 	else \
-		$(RE2C) $(RE2C_FLAGS) -o ext/pdo_pgsql/pgsql_sql_parser.c ext/pdo_pgsql/pgsql_sql_parser.re; \
+		$(RE2C) $(RE2C_FLAGS) -b -o ext/pdo_pgsql/pgsql_sql_parser.c ext/pdo_pgsql/pgsql_sql_parser.re; \
 	fi)

ext/pdo_pgsql/Makefile.frag.w32

@@ -1,3 +1,3 @@
 ext\pdo_pgsql\pgsql_sql_parser.c: ext\pdo_pgsql\pgsql_sql_parser.re
 	cd $(PHP_SRC_DIR)
-	$(RE2C) $(RE2C_FLAGS) -o ext/pdo_pgsql/pgsql_sql_parser.c ext/pdo_pgsql/pgsql_sql_parser.re
+	$(RE2C) $(RE2C_FLAGS) -b -o ext/pdo_pgsql/pgsql_sql_parser.c ext/pdo_pgsql/pgsql_sql_parser.re

ext/pdo_pgsql/pgsql_sql_parser.re

@@ -32,6 +32,7 @@ int pdo_pgsql_scanner(pdo_scanner_t *s)
 	SPECIALS	= [$eE:?"'/-];
 	MULTICHAR	= [:]{2,};
 	ANYNOEOF	= [\001-\377];
+	TEXTCHR		= ANYNOEOF\SPECIALS;
 	*/
 
 	/*!re2c
@@ -45,6 +46,7 @@ int pdo_pgsql_scanner(pdo_scanner_t *s)
 		QUESTION								{ RET(PDO_PARSER_BIND_POS); }
 		SPECIALS								{ SKIP_ONE(PDO_PARSER_TEXT); }
 		COMMENTS								{ RET(PDO_PARSER_TEXT); }
-		(ANYNOEOF\SPECIALS)+ 					{ RET(PDO_PARSER_TEXT); }
+		/* Plain text may contain e/E, as long as it doesn't end with one, which could start an E'...' string */
+		([eE]* TEXTCHR)+						{ RET(PDO_PARSER_TEXT); }
 	*/
 }

ext/pdo_pgsql/tests/pdo_pgsql_parser_e_strings.phpt

@@ -0,0 +1,52 @@
+--TEST--
+PgSQL PDO Parser: E'' strings next to text containing e/E
+--EXTENSIONS--
+pdo_pgsql
+--SKIPIF--
+<?php
+require __DIR__ . '/config.inc';
+require dirname(__DIR__, 2) . '/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require dirname(__DIR__, 2) . '/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(__DIR__ . '/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$queries = [
+    // The "?" and ":name" inside the E'' strings must not be treated as placeholders
+    ["SELECT E'here\\'s a ?' AS selected_e, ? AS value_e", ['one']],
+    ["SELECT 'x'||e'\\'?' AS concat_e, :name AS reference_e", ['name' => 'two']],
+    ["SELECT ('a%' LIKE 'a!%' ESCAPE'!')::text AS escape_e, E'\\\\:e' AS e, :e AS ee", ['e' => 'three']],
+    ["SELECT date'2026-10-14' AS date_e, ?::text AS where_else", ['four']],
+    ["SELECT ? AS e, ? AS E2 WHERE TRUE", ['five', 'six']],
+    ["SELECT /* e'? */ :value AS value_e -- e'?", ['value' => 'seven']],
+];
+
+foreach ([true, false] as $emulate) {
+    $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, $emulate);
+    echo $emulate ? "emulated:\n" : "native:\n";
+    foreach ($queries as [$sql, $params]) {
+        $stmt = $db->prepare($sql);
+        $stmt->execute($params);
+        echo json_encode($stmt->fetch()), "\n";
+    }
+}
+?>
+--EXPECT--
+emulated:
+{"selected_e":"here's a ?","value_e":"one"}
+{"concat_e":"x'?","reference_e":"two"}
+{"escape_e":"true","e":"\\:e","ee":"three"}
+{"date_e":"2026-10-14","where_else":"four"}
+{"e":"five","e2":"six"}
+{"value_e":"seven"}
+native:
+{"selected_e":"here's a ?","value_e":"one"}
+{"concat_e":"x'?","reference_e":"two"}
+{"escape_e":"true","e":"\\:e","ee":"three"}
+{"date_e":"2026-10-14","where_else":"four"}
+{"e":"five","e2":"six"}
+{"value_e":"seven"}