| protected static _findBoundary ( string $text, integer $pos, string $boundary, integer $end = null ) : array | ||
| $text | string | The text to search. |
| $pos | integer | The current position in $text. |
| $boundary | string | The boundary string. |
| $end | integer | If set, return after matching this many boundaries. |
| return | array | Keys are the boundary number, values are an array with two elements: 'start' and 'length'. |
protected static function _findBoundary($text, $pos, $boundary, $end = null)
{
$i = 0;
$out = array();
$search = "--" . $boundary;
$search_len = strlen($search);
while (($pos = strpos($text, $search, $pos)) !== false) {
/* Boundary needs to appear at beginning of string or right after
* a LF. */
if ($pos != 0 && $text[$pos - 1] != "\n") {
continue;
}
if (isset($out[$i])) {
$out[$i]['length'] = $pos - $out[$i]['start'] - 1;
}
if (!is_null($end) && $end == $i) {
break;
}
$pos += $search_len;
if (isset($text[$pos])) {
switch ($text[$pos]) {
case "\r":
$pos += 2;
$out[++$i] = array('start' => $pos);
break;
case "\n":
$out[++$i] = array('start' => ++$pos);
break;
case '-':
return $out;
}
}
}
return $out;
}