Support analysing preg_match_all args in reverse to infer matches type

src/Psalm/Internal/Analyzer/Statements/Expression/Call/ArgumentsAnalyzer.php

@@ -599,6 +599,10 @@ class ArgumentsAnalyzer
             }
         }
 
+        if ($method_id === 'preg_match_all' && count($args) > 3) {
+            $args = array_reverse($args, true);
+        }
+
         foreach ($args as $argument_offset => $arg) {
             $function_param = $function_param_count > $argument_offset
                 ? $function_params[$argument_offset]

tests/FunctionCallTest.php

@@ -1325,16 +1325,22 @@ class FunctionCallTest extends TestCase
             'pregMatchAll' => [
                 '<?php
                     /**
-                     * @psalm-pure
-                     *
                      * @return array<list<string>>
                      */
                     function extractUsernames(string $input): array {
-                        preg_match_all(\'/@[a-z\d](?:[a-z\d]|-(?=[a-z\d])){0,38}(?!\w)/\', $input, $matches);
+                        preg_match_all(\'/([a-zA-Z])*/\', $input, $matches);
 
                         return $matches;
                     }'
             ],
+            'pregMatchAllOffsetCapture' => [
+                '<?php
+                    function foo(string $input): array {
+                        preg_match_all(\'/([a-zA-Z])*/\', $input, $matches, PREG_OFFSET_CAPTURE);
+
+                        return $matches[0];
+                    }'
+            ],
         ];
     }