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1 change: 1 addition & 0 deletions Classes/PHPExcel/Cell.php
Original file line number Diff line number Diff line change
Expand Up @@ -836,6 +836,7 @@ public static function stringFromColumnIndex($pColumnIndex = 0)
// caching using a static within the method is faster than a class static,
// though it's additional memory overhead
static $_indexCache = array();
$pColumnIndex = (int) $pColumnIndex;

if (!isset($_indexCache[$pColumnIndex])) {
// Determine column string
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