Support XLSX that don't have a sharedStrings.xml file

src/Spout/Reader/Helper/XLSX/SharedStringsHelper.php

@@ -71,6 +71,24 @@ class SharedStringsHelper
         $this->tempFolder = $this->fileSystemHelper->createFolder($rootTempFolder, uniqid('sharedstrings'));
     }
 
+    /**
+     * Returns whether the XLSX file contains a shared strings XML file
+     *
+     * @return bool
+     */
+    public function hasSharedStrings()
+    {
+        $hasSharedStrings = false;
+        $zip = new \ZipArchive();
+
+        if ($zip->open($this->filePath) === true) {
+            $hasSharedStrings = ($zip->locateName(self::SHARED_STRINGS_XML_FILE_PATH) !== false);
+            $zip->close();
+        }
+
+        return $hasSharedStrings;
+    }
+
     /**
      * Builds an in-memory array containing all the shared strings of the worksheet.
      * All the strings are stored in a XML file, located at 'xl/sharedStrings.xml'.

src/Spout/Reader/XLSX.php

@@ -72,8 +72,12 @@ class XLSX extends AbstractReader
         $this->zip = new \ZipArchive();
 
         if ($this->zip->open($filePath) === true) {
+            $this->sharedStringsHelper = new SharedStringsHelper($filePath, $this->tempFolder);
+
+            if ($this->sharedStringsHelper->hasSharedStrings()) {
                 // Extracts all the strings from the worksheets for easy access in the future
-            $this->extractSharedStrings($filePath);
+                $this->sharedStringsHelper->extractSharedStrings();
+            }
 
             // Fetch all available worksheets
             $this->worksheetHelper = new WorksheetHelper($filePath, $this->globalFunctionsHelper);
@@ -87,19 +91,6 @@ class XLSX extends AbstractReader
         }
     }
 
-    /**
-     * Builds an in-memory array containing all the shared strings of the worksheets.
-     *
-     * @param  string $filePath Path of the XLSX file to be read
-     * @return void
-     * @throws \Box\Spout\Common\Exception\IOException If sharedStrings XML file can't be read
-     */
-    protected function extractSharedStrings($filePath)
-    {
-        $this->sharedStringsHelper = new SharedStringsHelper($filePath, $this->tempFolder);
-        $this->sharedStringsHelper->extractSharedStrings();
-    }
-
     /**
      * Returns whether another worksheet exists after the current worksheet.
      *

tests/Spout/Reader/XLSXTest.php

@@ -100,6 +100,20 @@ class XLSXTest extends \PHPUnit_Framework_TestCase
         }
     }
 
+    /**
+     * @return void
+     */
+    public function testReadShouldSupportFilesWithoutSharedStringsFile()
+    {
+        $allRows = $this->getAllRowsForFile('sheet_with_no_shared_strings_file.xlsx');
+
+        $expectedRows = [
+            [10, 11],
+            [20, 21],
+        ];
+        $this->assertEquals($expectedRows, $allRows);
+    }
+
     /**
      * @return void
      */