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CSVReader

About

CSVReader is lightweight and fast CSV reader library for PHP 7.x that is suitable for large size files.

CSVReader was developed for business and e-commerce environments where large CSV files with possible corrupted data can be ingested.

Features

• Easy to use.
• Small footprint (Read files as streams, so low memory is required).
• Read files with different encodings.
• Header column mapping based on string and number references.
• Auto column mapping.
• Support for different decimal separators (European ",", British ".").
• Type casting.
• Currency checking (Avoid to misinterpret corrupted or wrong currency values).
• Detect and ignore empty lines.
• Word segment extraction per column value.
• Word deletion per column. value.
• Column value replacement.
• Value exclusion based on regular expression.

Notes

• UTF-16 with BOM is not supported

Usage

Custom field map (For CSV with header)

    $csv = new \Juanparati\CSVReader\CSVReader(
        'file.csv',     // File path 
        ';',            // Column delimiter
        '"',            // Text enclosure
        'UTF-8',        // Charset
        ',',            // Decimal separator
        '\\'            // Escape character
    );

    // Define a custom map
    $csv->setMapField([
        'name' => ['column' => 'Firstname'],
        'price' => ['column' => 'Retailprice'],
    ],
    0   // Define where the head line. Default: 0 (first line)
    );

    // Extract rows sequentially
    while ($row = $csv->readCSVLine())
    {
        echo 'Name: ' . $row['name'];
        echo 'Price: ' . $row['price'];             
    }

Custom field map (For CSV without header)

    $csv = new \Juanparati\CSVReader\CSVReader(
        'file.csv',     // File path 
        ';'             // Column delimiter
    );

    // Define a custom map
    $csv->setMapField([
        'name' => ['column' => 0],
        'price' => ['column' => 3],
    ]);

    // Extract rows sequentially
    while ($row = $csv->readLine())
    {
        echo 'Name: ' . $row['name'];
        echo 'Price: ' . $row['price'];             
    }

Automatic field map

    $csv = new \Juanparati\CSVReader\CSVReader(
        'file.csv',     // File path 
        ';'             // Column delimiter
    );

    // Define a custom map
    $csv->setAutomaticMapField();

    // Extract rows sequentially
    while ($row = $csv->readCSVLine())
    {
        echo 'Firstname: ' . $row['Firstname'];
        echo 'Retailprice: ' . $row['Retailprice'];             
    }

Column separators

Separators are set as string or constant representation.

It is possible to use all kind of separators so it is not limited to the enumerated ones.

String enclosures

Enclosure node is used when strings in CSV are not enclosed by any kind of character.

Decimal separators

Column casting

It is possible to cast columns using the cast attribute.

      // Define a custom map
      $csv->setMapField([                
        'price' => ['column' => 'Retailprice', 'cast' => 'float'],
      ]);

Available casts are:

• int
• integer (alias of int)
• float
• string

Remove characters from column

Sometimes is required to remove certain characters on a specific column.

      // Define a custom map
      $csv->setMapField([                
        'price' => ['column' => 'Retailprice', 'cast' => 'float', 'remove' => ['EUR', '€'] 
      ]);

Replace characters from column

      // Replace "Mr." by "Señor"
      $csv->setMapField([                
        'name' => ['column' => 'Firstname', 'replace' => ['Mr.' => 'Señor'] 
      ]);

Exclude flag

Sometimes is convenient to flag rows according to the column data.

      // Exclude all names that equal to John
      $csv->setMapField([                
        'name' => ['column' => 'Firstname', 'exclude' => ['John'] 
      ]);

In this every time that column "name" has the word "John", the virtual column "exclude" will containe the value "true" (boolean).

The exclude parameter accepts regular expressions.

Apply stream filters

     $csv = new \Juanparati\CSVReader\CSVReader('file.csv');
     $csv->applyStreamFilter('zlib.deflate')

File information

It is possible to get current pointer position in bytes calling to the "tellPosition" method. In order to obtain the file stat a call to the "info" method will return the file stat (See http://php.net/manual/en/function.fstat.php).

    $csv = new \Juanparati\CSVReader\CSVReader('file.csv');
    echo 'Current byte position ' . $csv->tellPosition() . ' of ' . $csv->info()['size'];

Backers

• Matchbanker.es