PhpSpreadsheet/unitTests/testDataFileIterator.php

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<?php
class testDataFileIterator implements Iterator
{
protected $file;
protected $key = 0;
protected $current;
public function __construct($file)
{
$this->file = fopen($file, 'r');
}
public function __destruct()
{
fclose($this->file);
}
public function rewind()
{
rewind($this->file);
$this->current = $this->_parseNextDataset();
$this->key = 0;
}
public function valid()
{
return !feof($this->file);
}
public function key()
{
return $this->key;
}
public function current()
{
return $this->current;
}
public function next()
{
$this->current = $this->_parseNextDataset();
$this->key++;
}
private function _parseNextDataset()
{
$dataSet = explode(',',trim(fgets($this->file)));
foreach($dataSet as &$dataValue) {
if (!is_numeric($dataValue)) {
if($dataValue == '') {
$dataValue = NULL;
} elseif($dataValue == '""') {
$dataValue = '';
} elseif(($dataValue[0] == '"') && ($dataValue[strlen($dataValue)-1] == '"')) {
$dataValue = substr($dataValue,1,-1);
} else {
switch (strtoupper($dataValue)) {
case 'NULL' : $dataValue = NULL; break;
case 'TRUE' : $dataValue = TRUE; break;
case 'FALSE' : $dataValue = FALSE; break;
}
}
} else {
if (is_float($dataValue)) {
$dataValue = (float) $dataValue;
} else {
$dataValue = (int) $dataValue;
}
}
}
unset($dataValue);
return $dataSet;
}
}