Fix ext priority

Author: janedbal

src/UsedSymbolExtractor.php

@@ -155,15 +155,15 @@ public function parseUsedSymbols(
                             break;
                         }
 
-                        if (isset($extensionSymbols[$lowerName])) {
-                            $symbolName = $name;
-                            $kind = $extensionSymbols[$lowerName];
-                            $usedSymbols[$kind][$symbolName][] = $token[2];
-
-                        } elseif (isset($useStatements[$name])) {
+                        if (isset($useStatements[$name])) {
                             $symbolName = $useStatements[$name];
                             $kind = $useStatementKinds[$name];
                             $usedSymbols[$kind][$symbolName][] = $token[2];
+
+                        } elseif (isset($extensionSymbols[$lowerName])) {
+                            $symbolName = $name;
+                            $kind = $extensionSymbols[$lowerName];
+                            $usedSymbols[$kind][$symbolName][] = $token[2];
                         }
 
                         break;

tests/UsedSymbolExtractorTest.php

@@ -25,6 +25,7 @@ public function test(string $path, array $expectedUsages): void
             $expectedUsages,
             $extractor->parseUsedSymbols(
                 [
+                    strtolower('XMLReader') => SymbolKind::CLASSLIKE,
                     strtolower('PDO') => SymbolKind::CLASSLIKE,
                     strtolower('json_encode') => SymbolKind::FUNCTION,
                     strtolower('DDTrace\active_span') => SymbolKind::FUNCTION,
@@ -153,6 +154,7 @@ public function provideVariants(): iterable
                 ],
                 SymbolKind::CLASSLIKE => [
                     'PDO' => [11],
+                    'My\App\XMLReader' => [15],
                     'CURLOPT_SSL_VERIFYHOST' => [19],
                 ],
             ],
@@ -174,6 +176,7 @@ public function provideVariants(): iterable
                 ],
                 SymbolKind::CLASSLIKE => [
                     'PDO' => [11],
+                    'My\App\XMLReader' => [15],
                     'CURLOPT_SSL_VERIFYHOST' => [19],
                 ],
             ],

tests/data/not-autoloaded/used-symbols/extensions-global.php

@@ -2,7 +2,7 @@
 
 
 
-
+use My\App\XMLReader;
 use function DDTrace\active_span;
 
 json_encode('');
@@ -12,7 +12,7 @@
 active_span();
 DDTrace\root_span();
 DDTrace\DBM_PROPAGATION_FULL;
-
+XMLReader::class;
 
 
 // those are not provided as known ext symbols in the test

tests/data/not-autoloaded/used-symbols/extensions.php

@@ -1,9 +1,9 @@
 <?php
-
 namespace Extensions;
 
 use DDTrace;
 use function DDTrace\active_span;
+use My\App\XMLReader;
 
 json_encode('');
 LIBXML_ERR_FATAL;
@@ -12,7 +12,7 @@
 active_span();
 DDTrace\root_span();
 DDTrace\DBM_PROPAGATION_FULL;
-
+XMLReader::class;
 
 
 // those are not provided as known ext symbols in the test