具体如下：
<?php
class CSVIterator implements Iterator
{
const ROW_SIZE = 4096;
private $filePointer;
private $currentElement;
private $rowCounter;
private $delimiter;
public function __construct( $file, $delimiter = ',' )
{
$this->filePointer = fopen( $file, 'r' );
$this->delimiter = $delimiter;
}
public function rewind()
{
$this->rowCounter = 0;
rewind( $this->filePointer );
}
public function current()
{
$this->currentElement = fgetcsv($this->filePointer,self::ROW_SIZE,$this->delimiter);
$this->rowCounter++;
return $this->currentElement;
}
public function key()
{
return $this->rowCounter;
}
public function next()
{
return !feof( $this->filePointer );
}
public function valid()
{
if( !$this->next() )
{
fclose( $this->filePointer );
return FALSE;
}
return TRUE;
}
} // end class
?>
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