PHP SplFileObject::current方法代码示例

 /**
  * @inheritDoc
  */
 public function readLine()
 {
     if (!$this->file->eof()) {
         $line = $this->file->current();
         $this->file->next();
         return json_decode($line);
     }
     return false;
 }

 /**
  * {@inheritdoc}
  */
 public function read()
 {
     if ($this->file->valid()) {
         $this->file->seek($this->getContext()->getReadCount());
         $line = rtrim($this->file->current(), PHP_EOL);
         $this->getContext()->incrementReadCount();
         return json_decode($line, true);
     }
     return null;
 }

 public function testCheckAnswerTask3()
 {
     $this->assertFileExists('data/export.csv');
     $filecsv = new \SplFileObject('data/export.csv');
     $filecsv->setFlags(\SplFileObject::READ_CSV);
     $header = $filecsv->current();
     $processor = new YieldProcessor(ReaderFactory::create('Db\\Product', include 'config/database.php'), WriterFactory::create('Stub'), function () {
     });
     foreach ($processor->processing() as $item) {
         $filecsv->next();
         $this->assertEquals($item, array_combine($header, $filecsv->current()));
     }
 }

 protected function export($var, $return = false)
 {
     if ($var instanceof Closure) {
         /* dump anonymous function in to plain code.*/
         $ref = new ReflectionFunction($var);
         $file = new SplFileObject($ref->getFileName());
         $file->seek($ref->getStartLine() - 1);
         $result = '';
         while ($file->key() < $ref->getEndLine()) {
             $result .= $file->current();
             $file->next();
         }
         $begin = strpos($result, 'function');
         $end = strrpos($result, '}');
         $result = substr($result, $begin, $end - $begin + 1);
     } elseif (is_object($var)) {
         /* dump object with construct function. */
         $result = 'new ' . get_class($var) . '(' . $this->export(get_object_vars($var), true) . ')';
     } elseif (is_array($var)) {
         /* dump array in plain array.*/
         $array = array();
         foreach ($var as $k => $v) {
             $array[] = var_export($k, true) . ' => ' . $this->export($v, true);
         }
         $result = 'array(' . implode(', ', $array) . ')';
     } else {
         $result = var_export($var, true);
     }
     if (!$return) {
         print $result;
     }
     return $result;
 }

/**
 * 返回文件从X行到Y行的内容(支持php5、php4)
 * @param  String  $filename  文件名
 * @param  integer $startLine 开始行
 * @param  integer $endLine   结束行
 * @param  string  $method    方法
 * @return array() 返回数组
 */
function readFileByLines($filename, $startLine = 1, $endLine = 50, $method = 'rb')
{
    $content = array();
    $count = $endLine - $startLine;
    // 判断php版本（因为要用到SplFileObject，PHP>=5.1.0）
    if (version_compare(PHP_VERSION, '5.1.0', '>=')) {
        $fp = new SplFileObject($filename, $method);
        // 转到第N行, seek方法参数从0开始计数
        $fp->seek($startLine - 1);
        for ($i = 0; $i <= $count; ++$i) {
            // current()获取当前行内容
            $content[] = $fp->current();
            // 下一行
            $fp->next();
        }
    } else {
        //PHP<5.1
        $fp = fopen($filename, $method);
        if (!$fp) {
            return 'error:can not read file';
        }
        // 跳过前$startLine行
        for ($i = 1; $i < $startLine; ++$i) {
            fgets($fp);
        }
        // 读取文件行内容
        for ($i; $i <= $endLine; ++$i) {
            $content[] = fgets($fp);
        }
        fclose($fp);
    }
    // array_filter过滤：false,null,''
    return array_filter($content);
}

 /**
  * Get Code from file
  * @param $path
  * @param $line
  * @param $numLines
  * @return array|null
  */
 private function getCode($path, $line, $numLines)
 {
     if (empty($path) || empty($line) || !file_exists($path)) {
         return NULL;
     }
     try {
         // Get the number of lines in the file
         $file = new \SplFileObject($path);
         $file->seek(PHP_INT_MAX);
         $totalLines = $file->key() + 1;
         // Work out which lines we should fetch
         $start = max($line - floor($numLines / 2), 1);
         $end = $start + ($numLines - 1);
         if ($end > $totalLines) {
             $end = $totalLines;
             $start = max($end - ($numLines - 1), 1);
         }
         // Get the code for this range
         $code = array();
         $file->seek($start - 1);
         while ($file->key() < $end) {
             $code[$file->key() + 1] = rtrim($file->current());
             $file->next();
         }
         return $code;
     } catch (RuntimeException $ex) {
         return null;
     }
 }

function modifyFileLine($filename, $linenum, $lineText)
{
    $fp = new SplFileObject($filename);
    $fp->seek($linenum);
    $line = $fp->current();
    $fp->fseek($linenum, SEEK_CUR);
    $fp->fwrite($lineText);
}

 /**
  * Write the compiled csv to disk and return the file name
  *
  * @param array $sortedHeaders An array of sorted headers
  *
  * @return string The csv filename where the data was written
  */
 public function prepare($cacheFile, $sortedHeaders)
 {
     $csvFile = $cacheFile . '.csv';
     $handle = fopen($csvFile, 'w');
     // Generate a csv version of the multi-row headers to write to disk
     $headerRows = [[], []];
     foreach ($sortedHeaders as $idx => $header) {
         if (!is_array($header)) {
             $headerRows[0][] = $header;
             $headerRows[1][] = '';
         } else {
             foreach ($header as $headerName => $subHeaders) {
                 $headerRows[0][] = $headerName;
                 $headerRows[1] = array_merge($headerRows[1], $subHeaders);
                 if (count($subHeaders) > 1) {
                     /**
                      * We need to insert empty cells for the first row of headers to account for the second row
                      * this acts as a faux horizontal cell merge in a csv file
                      * | Header 1 | <---- 2 extra cells ----> |
                      * | Sub 1    | Subheader 2 | Subheader 3 |
                      */
                     $headerRows[0] = array_merge($headerRows[0], array_fill(0, count($subHeaders) - 1, ''));
                 }
             }
         }
     }
     fputcsv($handle, $headerRows[0]);
     fputcsv($handle, $headerRows[1]);
     // TODO: Track memory usage
     $file = new \SplFileObject($cacheFile);
     while (!$file->eof()) {
         $csvRow = [];
         $row = json_decode($file->current(), true);
         if (!is_array($row)) {
             // Invalid json data -- don't process this row
             continue;
         }
         foreach ($sortedHeaders as $idx => $header) {
             if (!is_array($header)) {
                 $csvRow[] = isset($row[$header]) ? $row[$header] : '';
             } else {
                 // Multi-row header, so we need to set all values
                 $nestedHeaderName = array_keys($header)[0];
                 $nestedHeaders = $header[$nestedHeaderName];
                 foreach ($nestedHeaders as $nestedHeader) {
                     $csvRow[] = isset($row[$nestedHeaderName][$nestedHeader]) ? $row[$nestedHeaderName][$nestedHeader] : '';
                 }
             }
         }
         fputcsv($handle, $csvRow);
         $file->next();
     }
     $file = null;
     // Get rid of the file handle that SplFileObject has on cache file
     unlink($cacheFile);
     fclose($handle);
     return $csvFile;
 }

 /**
  * valid SplFileObjectでCSVフィルを読ませると最終行の空配列で返るのでそれの抑止
  *
  * @return bool
  */
 public function valid()
 {
     $parentValid = parent::valid();
     $var = parent::current();
     if ($var === array(null)) {
         return false;
     }
     return $parentValid;
 }

 /**
  * @param string $expectedContent
  * @param integer $zeroBasedLineNumber
  * @param boolean $trimLine
  * @return void
  */
 private function assertSameContentAtLine($expectedContent, $zeroBasedLineNumber, $trimLine = true)
 {
     $this->fileObject->seek($zeroBasedLineNumber);
     $actualContent = $this->fileObject->current();
     if ($trimLine) {
         $actualContent = trim($actualContent);
     }
     $this->assertSame($expectedContent, $actualContent);
 }

 /**
  * @param \SplFileObject $stream
  *
  * Reads the file to parse its lines
  */
 public function readFile(\SplFileObject $stream)
 {
     $stream->setFlags(\SplFileObject::READ_CSV | \SplFileObject::READ_AHEAD | \SplFileObject::SKIP_EMPTY | \SplFileObject::DROP_NEW_LINE);
     while (!$stream->eof()) {
         $this->parseLine($stream->current());
         $stream->next();
     }
     $stream = null;
 }

 /**
  * Fetch the current line as an associative array
  *
  * @return array
  */
 public function current()
 {
     $data = trim(parent::current());
     $parts = parse_url($data);
     if (isset($parts['query'])) {
         $parts['query'] = $this->_parseQuery($parts['query']);
     }
     return $parts;
 }

 /**
  * Evaluates the closure and the code in the reset of the file. This sets
  * the code for the closure, the namespace it is declared in (if any) and
  * any applicable namespace imports
  * @param ReflectionFunction The reflected function of the closure
  * @return String The code the closure runs 
  */
 private function evaluate(\ReflectionFunction $reflection)
 {
     $code = '';
     $full = '';
     $file = new \SplFileObject($reflection->getFileName());
     while (!$file->eof()) {
         if ($file->key() >= $reflection->getStartLine() - 1 && $file->key() < $reflection->getEndLine()) {
             $code .= $file->current();
         }
         $full .= $file->current();
         $file->next();
     }
     //@todo this assumes the function will be the only one on that line
     $begin = strpos($code, 'function');
     //@todo this assumes the } will be the only one on that line
     $end = strrpos($code, '}');
     $this->code = substr($code, $begin, $end - $begin + 1);
     $this->extractDetail($full);
 }

 /**
  * This method returns the element at the the specified index.
  *
  * @access public
  * @param integer $index                                    the index of the element
  * @return mixed                                            the element at the specified index
  * @throws Throwable\InvalidArgument\Exception              indicates that an index must be an integer
  * @throws Throwable\OutOfBounds\Exception                  indicates that the index is out of bounds
  */
 public function getValue($index)
 {
     if (!$this->hasIndex($index)) {
         throw new Throwable\OutOfBounds\Exception('Unable to get element. Undefined index at ":index" specified', array(':index' => $index));
     }
     $this->reader->seek($index);
     $line = $this->reader->current();
     $value = unserialize($line);
     return $value;
 }

 public function current()
 {
     if ($this->_columns) {
         if (false === ($combined = @array_combine($this->_columns, parent::current()))) {
             throw new Exception(sprintf("Column count did not match expected on line %d", parent::key()));
         }
         return $combined;
     }
     return parent::current();
 }