Back port the changes from contao/core-bundle#1059.

leofeyer · leofeyer · commit cd609270fb58 · 2017-11-09T21:15:03.000+01:00
diff --git a/system/modules/core/library/Contao/StringUtil.php b/system/modules/core/library/Contao/StringUtil.php
@@ -605,13 +605,13 @@ function (array $matches) use ($arrData)
 			$blnCurrent = $arrStack[count($arrStack) - 1];
 			$blnCurrentIf = $arrIfStack[count($arrIfStack) - 1];
 
-			if (strncmp($strTag, '{if', 3) === 0)
+			if (strncmp($strTag, '{if ', 4) === 0)
 			{
 				$blnExpression = $evaluateExpression(substr($strTag, 4, -1));
 				$arrStack[] = $blnCurrent && $blnExpression;
 				$arrIfStack[] = $blnExpression;
 			}
-			elseif (strncmp($strTag, '{elseif', 7) === 0)
+			elseif (strncmp($strTag, '{elseif ', 8) === 0)
 			{
 				$blnExpression = $evaluateExpression(substr($strTag, 8, -1));
 				array_pop($arrStack);

Original file line number	Diff line number	Diff line change
`@@ -605,13 +605,13 @@ function (array $matches) use ($arrData)`
`605`	`605`	`$blnCurrent = $arrStack[count($arrStack) - 1];`
`606`	`606`	`$blnCurrentIf = $arrIfStack[count($arrIfStack) - 1];`
`607`	`607`
`608`		`- if (strncmp($strTag, '{if', 3) === 0)`
	`608`	`+ if (strncmp($strTag, '{if ', 4) === 0)`
`609`	`609`	`{`
`610`	`610`	`$blnExpression = $evaluateExpression(substr($strTag, 4, -1));`
`611`	`611`	`$arrStack[] = $blnCurrent && $blnExpression;`
`612`	`612`	`$arrIfStack[] = $blnExpression;`
`613`	`613`	`}`
`614`		`- elseif (strncmp($strTag, '{elseif', 7) === 0)`
	`614`	`+ elseif (strncmp($strTag, '{elseif ', 8) === 0)`
`615`	`615`	`{`
`616`	`616`	`$blnExpression = $evaluateExpression(substr($strTag, 8, -1));`
`617`	`617`	`array_pop($arrStack);`