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Informations about the package csv-mapper

CSV mapper

Uses league\csv for reading CSV. Adds record & column mapping.

The first line is always used as header. You don't have to call setHeaderOffset(0).

In all examples, $reader is iterated, not queried with a Statement:

foreach ( $reader as $record ) {
    // $record is done, no more processing needed
    print_r($record);
}

Record mappers

To keep only certain columns, and discard the rest, use the KeepColumnsMapper:

$reader = \rdx\csvmapper\Reader::createFromPath($file);
$reader->addMapper(new KeepColumnsMapper(['firstname', 'lastname', 'email']));

Create your own record mapper by implementing RecordMapper:

class AddTimestampMapper implements RecordMapper {
    protected $time;
    public function __construct( $time ) {
        $this->time = $time;
    }
    public function map( array $record, $index ) {
        $record['timestamp'] = $this->time;
        return $record;
    }
}

$reader->addMapper(new AddTimestampMapper(time()));

Require columns

Require columns before processing iterating through the rows:

$reader = \rdx\csvmapper\Reader::createFromPath($file);
try {
    $reader->requireColumns(['email']);
}
catch ( MissingColumnsException $ex ) {
    echo implode(', ', $ex->getColumns());
}

Column mappers

If several columns in the same row have the same mapping, use the ColumnsMapper record mapper with the ColumnMapper interface.

To format several date fields with your own date formatter:

class DateFormatMapper implements ColumnMapper {
    public function map( array $record, $column, $index, $unset ) {
        $value = trim($record[$column]);
        $date = my_custom_date_maker($value);

        if ( !$date ) {
            // Invalid = NIL
            return null;

            // Invalid = skip field (remove from $record)
            return $unset;

            // Invalid = user error
            throw new LineException($index, "Invalid date: '$value'");
        }

        return $date;
    }
}

try {
    $reader = \rdx\csvmapper\Reader::createFromPath($file);
    $reader->addMapper(new ColumnsMapper(new DateFormatMapper(), ['birthdate', 'created_on', 'valid_until']));
}
catch ( LineException $ex ) {
    echo $ex->getMessage();
    print_r($ex->getRecord($reader));
}

This will run the DateFormatMapper max 3 times for every row. The mapper runs only for fields that exist in $record.

If you want to make a field from nothing, use RecordMapper to alter the record. ColumnMapper only alters/unsets columns.

All versions of csv-mapper with dependencies

PHP Build Version
Package Version
Requires league/csv Version ^9.1
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