Fix warning when reading xlsx without styles

AegirLeet · Frederic Delaunay · commit c6523abcd2ee · 2018-10-29T12:31:55.000+01:00
Fixes PHPOffice/PHPExcel#1134 Fixes PHPOffice#631
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Allow iterators to go out of bounds with prev - [#587](https://github.com/PHPOffice/PhpSpreadsheet/issues/587)
+- Fix warning when reading xlsx without styles - [#631](https://github.com/PHPOffice/PhpSpreadsheet/pull/631)
 
 ## [1.4.0] - 2018-08-06
 
diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -643,7 +643,7 @@ public function load($pFilename)
                             $excel->addCellXf($objStyle);
                         }
 
-                        foreach ($xmlStyles->cellStyleXfs->xf as $xf) {
+                        foreach (isset($xmlStyles->cellStyleXfs->xf) ? $xmlStyles->cellStyleXfs->xf : [] as $xf) {
                             $numFmt = NumberFormat::FORMAT_GENERAL;
                             if ($numFmts && $xf['numFmtId']) {
                                 $tmpNumFmt = self::getArrayItem($numFmts->xpath("sml:numFmt[@numFmtId=$xf[numFmtId]]"));

Original file line number	Diff line number	Diff line change
`@@ -643,7 +643,7 @@ public function load($pFilename)`
`643`	`643`	`$excel->addCellXf($objStyle);`
`644`	`644`	`}`
`645`	`645`
`646`		`- foreach ($xmlStyles->cellStyleXfs->xf as $xf) {`
	`646`	`+ foreach (isset($xmlStyles->cellStyleXfs->xf) ? $xmlStyles->cellStyleXfs->xf : [] as $xf) {`
`647`	`647`	`$numFmt = NumberFormat::FORMAT_GENERAL;`
`648`	`648`	`if ($numFmts && $xf['numFmtId']) {`
`649`	`649`	`$tmpNumFmt = self::getArrayItem($numFmts->xpath("sml:numFmt[@numFmtId=$xf[numFmtId]]"));`