Merge d52e87d4bde2d5259425a1ba9103bdd37c006d6d into 3edb056286e9f047bcddff4350c00b00e70718b6

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

@@ -34,6 +34,9 @@ class SharedStringsHelper
     /** Value to use to escape the line feed character ("\n") */
     const ESCAPED_LINE_FEED_CHARACTER = '_x000A_';
 
+    /** Disabling this will increase your memory usage but can improve your execution time */
+    protected $useSharedStringsFileCache;
+    
     /** @var string Path of the XLSX file being read */
     protected $filePath;
 
@@ -56,15 +59,17 @@ class SharedStringsHelper
      * @var string Contents of the temporary file that was last read
      * @see MAX_NUM_STRINGS_PER_TEMP_FILE
      */
-    protected $inMemoryTempFileContents;
+    protected $inMemoryContents;
     
     /**
      * @param string $filePath Path of the XLSX file being read
      * @param string|void $tempFolder Temporary folder where the temporary files to store shared strings will be stored
+     * @param bool|void $useSharedStringsFileCache Disabling this will increase your memory usage but can improve your execution time
      */
-    public function __construct($filePath, $tempFolder = null)
+    public function __construct($filePath, $tempFolder = null, $useSharedStringsFileCache = true)
     {
         $this->filePath = $filePath;
+        $this->useSharedStringsFileCache = $useSharedStringsFileCache;
 
         $rootTempFolder = ($tempFolder) ?: sys_get_temp_dir();
         $this->fileSystemHelper = new FileSystemHelper($rootTempFolder);
@@ -141,11 +146,19 @@ class SharedStringsHelper
 
             $unescapedTextValue = $escaper->unescape($textValue);
 
+            if ($this->useSharedStringsFileCache) {
                 // The shared string retrieval logic expects each cell data to be on one line only
                 // Encoding the line feed character allows to preserve this assumption
                 $lineFeedEncodedTextValue = $this->escapeLineFeed($unescapedTextValue);
             
                 $this->writeSharedStringToTempFile($lineFeedEncodedTextValue, $sharedStringIndex);
+            } else {
+                if (!isset($this->inMemoryContents)) {
+                    $this->inMemoryContents = [];
+                }
+                
+                $this->inMemoryContents[$sharedStringIndex] = $unescapedTextValue;
+            }
 
             $sharedStringIndex++;
 
@@ -262,6 +275,9 @@ class SharedStringsHelper
      */
     public function getStringAtIndex($sharedStringIndex)
     {
+        $sharedString = null;
+    
+        if ($this->useSharedStringsFileCache) {
             $tempFilePath = $this->getSharedStringTempFilePath($sharedStringIndex);
             $indexInFile = $sharedStringIndex % self::MAX_NUM_STRINGS_PER_TEMP_FILE;
 
@@ -271,17 +287,21 @@ class SharedStringsHelper
 
             if ($this->inMemoryTempFilePath !== $tempFilePath) {
                 // free memory
-            unset($this->inMemoryTempFileContents);
+                unset($this->inMemoryContents);
 
-            $this->inMemoryTempFileContents = explode(PHP_EOL, file_get_contents($tempFilePath));
+                $this->inMemoryContents = explode(PHP_EOL, file_get_contents($tempFilePath));
                 $this->inMemoryTempFilePath = $tempFilePath;
             }
             
-        $sharedString = null;
+            if (array_key_exists($indexInFile, $this->inMemoryContents)) {
-        if (array_key_exists($indexInFile, $this->inMemoryTempFileContents)) {
+                $escapedSharedString = $this->inMemoryContents[$indexInFile];
-            $escapedSharedString = $this->inMemoryTempFileContents[$indexInFile];
                 $sharedString = $this->unescapeLineFeed($escapedSharedString);
             }
+        } else {
+            if (is_array($this->inMemoryContents) && array_key_exists($sharedStringIndex, $this->inMemoryContents)) {
+                $sharedString = $this->inMemoryContents[$sharedStringIndex];
+            }
+        }
 
         if ($sharedString === null) {
             throw new SharedStringNotFoundException("Shared string not found for index: $sharedStringIndex");

src/Spout/Reader/XLSX.php

@@ -33,6 +33,9 @@ class XLSX extends AbstractReader
     /** @var string Temporary folder where the temporary files will be created */
     protected $tempFolder;
     
+    /** @var bool Disabling this will increase your memory usage but can improve your execution time */
+    protected $useSharedStringsFileCache = true;
+
     /** @var \ZipArchive */
     protected $zip;
 
@@ -64,6 +67,19 @@ class XLSX extends AbstractReader
         return $this;
     }
     
+    /**
+     * Disabling the shared strings file cache will increase your memory usage but can improve your execution time.
+     * The shared strings file cache is active by default.
+     *
+     * @param bool $useSharedStringsFileCache
+     * @return XLSX
+     */
+    public function setUseSharedStringsFileCache($useSharedStringsFileCache)
+    {    
+        $this->useSharedStringsFileCache = $useSharedStringsFileCache;
+        return $this;
+    }
+
     /**
      * Opens the file at the given file path to make it ready to be read.
      * It also parses the sharedStrings.xml file to get all the shared strings available in memory
@@ -80,7 +96,7 @@ class XLSX extends AbstractReader
         $this->zip = new \ZipArchive();
 
         if ($this->zip->open($filePath) === true) {
-            $this->sharedStringsHelper = new SharedStringsHelper($filePath, $this->tempFolder);
+            $this->sharedStringsHelper = new SharedStringsHelper($filePath, $this->tempFolder, $this->useSharedStringsFileCache);
 
             if ($this->sharedStringsHelper->hasSharedStrings()) {
                 // Extracts all the strings from the worksheets for easy access in the future