Merge branch 'PHP-8.1'

* PHP-8.1:
  Fix GH-8121: SplFileObject - seek and key with csv file inconsistent

Author: cmb69

ext/spl/spl_directory.c

@@ -1939,7 +1939,11 @@ static int spl_filesystem_file_read_line_ex(zval * this_ptr, spl_filesystem_obje
 	zval retval;
 
 	/* 1) use fgetcsv? 2) overloaded call the function, 3) do it directly */
-	if (SPL_HAS_FLAG(intern->flags, SPL_FILE_OBJECT_READ_CSV) || intern->u.file.func_getCurr->common.scope != spl_ce_SplFileObject) {
+	if (SPL_HAS_FLAG(intern->flags, SPL_FILE_OBJECT_READ_CSV)) {
+		return spl_filesystem_file_read_csv(intern, intern->u.file.delimiter, intern->u.file.enclosure, intern->u.file.escape, NULL);
+	}
+	if (intern->u.file.func_getCurr->common.scope != spl_ce_SplFileObject) {
+		zend_execute_data *execute_data = EG(current_execute_data);
 		spl_filesystem_file_free_line(intern);
 
 		if (php_stream_eof(intern->u.file.stream)) {
@@ -1948,11 +1952,6 @@ static int spl_filesystem_file_read_line_ex(zval * this_ptr, spl_filesystem_obje
 			}
 			return FAILURE;
 		}
-		if (SPL_HAS_FLAG(intern->flags, SPL_FILE_OBJECT_READ_CSV)) {
-			return spl_filesystem_file_read_csv(intern, intern->u.file.delimiter, intern->u.file.enclosure, intern->u.file.escape, NULL);
-		}
-
-		zend_execute_data *execute_data = EG(current_execute_data);
 		zend_call_method_with_0_params(Z_OBJ_P(this_ptr), Z_OBJCE_P(ZEND_THIS), &intern->u.file.func_getCurr, "getCurrentLine", &retval);
 		if (Z_ISUNDEF(retval)) {
 			return FAILURE;
@@ -2736,8 +2735,8 @@ PHP_METHOD(SplFileObject, seek)
 		}
 	}
 	if (line_pos > 0) {
-		intern->u.file.current_line_num++;
 		if (!SPL_HAS_FLAG(intern->flags, SPL_FILE_OBJECT_READ_AHEAD)) {
+		intern->u.file.current_line_num++;
 			spl_filesystem_file_free_line(intern);
 		}
 	}

ext/spl/tests/gh8121.csv

@@ -0,0 +1,5 @@
+id,status,on_sale,brand,name,link,meta_title,meta_desc,description
+1,2,15,Samsung,M21,samsung-m21,Samsung M21,Samsung M21,Samsung M21
+2,2,15,Samsung,M32,samsung-m32,Samsung M32,Samsung M32,Samsung M32
+3,2,15,Samsung,M21,samsung-m21,Samsung M21,Samsung M21,Samsung M21
+4,2,15,Samsung,M32,samsung-m32,Samsung M32,Samsung M32,Samsung M32

ext/spl/tests/gh8121.phpt

@@ -0,0 +1,39 @@
+--TEST--
+GH-8121 (SplFileObject - seek and key with csv file inconsistent)
+--FILE--
+<?php
+$flagss = [
+    SplFileObject::READ_AHEAD | SplFileObject::READ_CSV | SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE,
+    SplFileObject::READ_AHEAD |                           SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE,
+                                                          SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE,
+];
+foreach ($flagss as $flags) {
+    $file = new SplFileObject(__DIR__ . "/gh8121.csv", "r");
+    echo "flags: $flags\n";
+    $file->setFlags($flags);
+    $file->seek(0);
+    var_dump($file->key());
+    $file->seek(1);
+    var_dump($file->key());
+    $file->seek(2);
+    var_dump($file->key());
+    $file->seek(3);
+    var_dump($file->key());
+}
+?>
+--EXPECT--
+flags: 15
+int(0)
+int(1)
+int(2)
+int(3)
+flags: 7
+int(0)
+int(1)
+int(2)
+int(3)
+flags: 5
+int(0)
+int(1)
+int(2)
+int(3)