diff --git a/src/Symfony/Component/Serializer/Encoder/CsvEncoder.php b/src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
index 55f78b1d0e013..a2d4df909dce8 100644
--- a/src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/CsvEncoder.php
@@ -181,18 +181,24 @@ public function decode(string $data, string $format, array $context = [])
$depth = $headerCount[$i];
$arr = &$item;
for ($j = 0; $j < $depth; ++$j) {
+ $headerName = $headers[$i][$j];
+
+ if ('' === $headerName) {
+ $headerName = $i;
+ }
+
// Handle nested arrays
if ($j === ($depth - 1)) {
- $arr[$headers[$i][$j]] = $cols[$i];
+ $arr[$headerName] = $cols[$i];
continue;
}
- if (!isset($arr[$headers[$i][$j]])) {
- $arr[$headers[$i][$j]] = [];
+ if (!isset($arr[$headerName])) {
+ $arr[$headerName] = [];
}
- $arr = &$arr[$headers[$i][$j]];
+ $arr = &$arr[$headerName];
}
}
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
index 06cf6a0617d86..3d2163c06e923 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
@@ -218,7 +218,13 @@ public function testDecodeEmptyData()
{
$data = $this->encoder->decode("\n\n", 'csv');
- $this->assertSame([['' => null]], $data);
+ $this->assertSame([[0 => null]], $data);
+ }
+
+ public function testMultipleEmptyHeaderNamesWithSeparator()
+ {
+ $this->encoder->decode(',.
+,', 'csv');
}
public function testEncodeVariableStructure()
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