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Documentation/markdown/Features/Autofilters/01-Autofilters.md

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+# PHPExcel AutoFilter Reference 
+
+
+## AutoFilters
+
+Each worksheet in an Excel Workbook can contain a single autoFilter range. Filtered data displays only the rows that meet criteria that you specify and hides rows that you do not want displayed. You can filter by more than one column: filters are additive, which means that each additional filter is based on the current filter and further reduces the subset of data.
+
+![01-01-autofilter.png](./images/01-01-autofilter.png "")
+
+When an AutoFilter is applied to a range of cells, the first row in an autofilter range will be the heading row, which displays the autoFilter dropdown icons. It is not part of the actual autoFiltered data. All subsequent rows are the autoFiltered data. So an AutoFilter range should always contain the heading row and one or more data rows (one data row is pretty meaningless), but PHPExcel won't actually stop you specifying a meaningless range: it's up to you as the developer to avoid such errors.
+
+To determine if a filter is applied, note the icon in the column heading. A drop-down arrow (![01-03-filter-icon-1.png](./images/01-03-filter-icon-1.png "")) means that filtering is enabled but not applied. In MS Excel, when you hover over the heading of a column with filtering enabled but not applied, a screen tip displays the cell text for the first row in that column, and the message "(Showing All)".
+
+![01-02-autofilter.png](./images/01-02-autofilter.png "")
+
+
+A Filter button (![01-03-filter-icon-2.png](./images/01-03-filter-icon-2.png "")) means that a filter is applied. When you hover over the heading of a filtered column, a screen tip displays the filter applied to that column, such as "Equals a red cell color" or "Larger than 150".
+
+![01-04-autofilter.png](./images/01-04-autofilter.png "")

Documentation/markdown/Features/Autofilters/02-Setting-an-Autofilter.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Setting an AutoFilter area on a worksheet
+
+To set an autoFilter on a range of cells.
+
+```php
+$objPHPExcel->getActiveSheet()->setAutoFilter('A1:E20');
+```
+
+The first row in an autofilter range will be the heading row, which displays the autoFilter dropdown icons. It is not part of the actual autoFiltered data. All subsequent rows are the autoFiltered data. So an AutoFilter range should always contain the heading row and one or more data rows (one data row is pretty meaningless, but PHPExcel won't actually stop you specifying a meaningless range: it's up to you as the developer to avoid such errors.
+
+If you want to set the whole worksheet as an autofilter region
+
+```php
+$objPHPExcel->getActiveSheet()->setAutoFilter(
+    $objPHPExcel->getActiveSheet()
+        ->calculateWorksheetDimension()
+);
+```
+
+This enables filtering, but does not actually apply any filters.
+

Documentation/markdown/Features/Autofilters/03-Autofilter-Expressions.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Autofilter Expressions
+
+PHPEXcel 1.7.8 introduced the ability to actually create, read and write filter expressions; initially only for Excel2007 files, but later releases will extend this to other formats.
+
+To apply a filter expression to an autoFilter range, you first need to identify which column you're going to be applying this filter to.
+
+```php
+$autoFilter = $objPHPExcel->getActiveSheet()->getAutoFilter();
+$columnFilter = $autoFilter->getColumn('C');
+```
+
+This returns an autoFilter column object, and you can then apply filters to that column.
+
+There are a number of different types of autofilter expressions. The most commonly used are:
+
+ - Simple Filters
+ - DateGroup Filters
+ - Custom filters
+ - Dynamic Filters
+ - Top Ten Filters
+
+These different types are mutually exclusive within any single column. You should not mix the different types of filter in the same column. PHPExcel will not actively prevent you from doing this, but the results are unpredictable.
+

Documentation/markdown/Features/Autofilters/04-01-Autofilter-Expressions-Simple.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Autofilter Expressions
+
+### Simple filters
+
+In MS Excel, Simple Filters are a dropdown list of all values used in that column, and the user can select which ones they want to display and which ones they want to hide by ticking and unticking the checkboxes alongside each option. When the filter is applied, rows containing the checked entries will be displayed, rows that don't contain those values will be hidden.
+
+![04-01-simple-autofilter.png](./images/04-01-simple-autofilter.png "")
+
+To create a filter expression, we need to start by identifying the filter type. In this case, we're just going to specify that this filter is a standard filter.
+
+```php
+$columnFilter->setFilterType(
+    PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_FILTERTYPE_FILTER
+);
+```
+
+Now we've identified the filter type, we can create a filter rule and set the filter values:
+
+When creating a simple filter in PHPExcel, you only need to specify the values for "checked" columns: you do this by creating a filter rule for each value.
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        'France'
+    );
+
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        'Germany'
+    );
+```
+
+This creates two filter rules: the column will be filtered by values that match “France” OR “Germany”. For Simple Filters, you can create as many rules as you want
+
+Simple filters are always a comparison match of EQUALS, and multiple standard filters are always treated as being joined by an OR condition.
+
+#### Matching Blanks
+
+If you want to create a filter to select blank cells, you would use:
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        ''
+    );
+```

Documentation/markdown/Features/Autofilters/04-02-Autofilter-Expressions-Dategroup.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Autofilter Expressions
+
+### DateGroup Filters
+
+In MS Excel, DateGroup filters provide a series of dropdown filter selectors for date values, so you can specify entire years, or months within a year, or individual days within each month.
+
+![04-02-dategroup-autofilter.png](./images/04-02-dategroup-autofilter.png "")
+
+DateGroup filters are still applied as a Standard Filter type.
+
+```php
+$columnFilter->setFilterType(
+    PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_FILTERTYPE_FILTER
+);
+```
+
+Creating a dateGroup filter in PHPExcel, you specify the values for "checked" columns as an associative array of year. month, day, hour minute and second. To select a year and month, you need to create a DateGroup rule identifying the selected year and month:
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        array(
+            'year' => 2012,
+            'month' => 1
+        )
+    )
+    ->setRuleType(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_DATEGROUP
+    );
+```
+
+The key values for the associative array are:
+
+ - year
+ - month
+ - day
+ - hour
+ - minute
+ - second
+
+Like Standard filters, DateGroup filters are always a match of EQUALS, and multiple standard filters are always treated as being joined by an OR condition.
+
+Note that we alse specify a ruleType: to differentiate this from a standard filter, we explicitly set the Rule's Type to AUTOFILTER_RULETYPE_DATEGROUP. As with standard filters, we can create any number  of DateGroup Filters.
+

Documentation/markdown/Features/Autofilters/04-03-Autofilter-Expressions-Custom.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Autofilter Expressions
+
+### Custom filters
+
+In MS Excel, Custom filters allow us to select more complex conditions using an operator as well as a value. Typical examples might be values that fall within a range (e.g. between -20 and +20), or text values with wildcards (e.g. beginning with the letter U). To handle this, they
+
+![04-03-custom-autofilter-1.png](./images/04-03-custom-autofilter-1.png "")
+
+![04-03-custom-autofilter-2.png](./images/04-03-custom-autofilter-2.png "")
+
+Custom filters are limited to 2 rules, and these can be joined using either an AND or an OR.
+
+We start by specifying a Filter type, this time a CUSTOMFILTER.
+
+```php
+$columnFilter->setFilterType(
+    PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_FILTERTYPE_CUSTOMFILTER
+);
+```
+
+And then define our rules.
+
+The following shows a simple wildcard filter to show all column entries beginning with the letter 'U'.
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        'U*'
+    )
+    ->setRuleType(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_CUSTOMFILTER
+    );
+```
+
+MS Excel uses \* as a wildcard to match any number of characters, and ? as a wildcard to match a single character. 'U\*' equates to "begins with a 'U'"; '\*U' equates to "ends with a 'U'"; and '\*U\*' equates to "contains a 'U'"
+
+If you want to match explicitly against a \* or a ? character, you can escape it with a tilde (~), so ?~\*\* would explicitly match for a \* character as the second character in the cell value, followed by any number of other characters. The only other character that needs escaping is the ~ itself.
+
+To create a "between" condition, we need to define two rules:
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_GREATERTHANOREQUAL,
+        -20
+    )
+    ->setRuleType(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_CUSTOMFILTER
+    );
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_LESSTHANOREQUAL,
+        20
+    )
+    ->setRuleType(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_CUSTOMFILTER
+    );
+```
+
+We also set the rule type to CUSTOMFILTER.
+
+This defined two rules, filtering numbers that are >= -20 OR <= 20, so we also need to modify the join condition to reflect AND rather than OR.
+
+```php
+$columnFilter->setAndOr(
+    PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_COLUMN_ANDOR_AND
+);
+```
+
+The valid set of operators for Custom Filters are defined in the PHPExcel_Worksheet_AutoFilter_Column_Rule class, and comprise:
+
+    Operator Constant                         | Value                |
+    ------------------------------------------|----------------------|
+    AUTOFILTER_COLUMN_RULE_EQUAL              | 'equal'              |
+    AUTOFILTER_COLUMN_RULE_NOTEQUAL           | 'notEqual'           |
+    AUTOFILTER_COLUMN_RULE_GREATERTHAN        | 'greaterThan'        |
+    AUTOFILTER_COLUMN_RULE_GREATERTHANOREQUAL | 'greaterThanOrEqual' |
+    AUTOFILTER_COLUMN_RULE_LESSTHAN           | 'lessThan'           |
+    AUTOFILTER_COLUMN_RULE_LESSTHANOREQUAL    | 'lessThanOrEqual'    |
+

Documentation/markdown/Features/Autofilters/04-04-Autofilter-Expressions-Dynamic.md

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+# PHPExcel AutoFilter Reference 
+
+
+## Autofilter Expressions
+
+### Dynamic Filters
+
+Dynamic Filters are based on a dynamic comparison condition, where the value we're comparing against the cell values is variable, such as 'today'; or when we're testing against an aggregate of the cell data (e.g. 'aboveAverage'). Only a single dynamic filter can be applied to a column at a time.
+
+![04-04-dynamic-autofilter.png](./images/04-04-dynamic-autofilter.png "")
+
+Again, we start by specifying a Filter type, this time a DYNAMICFILTER.
+
+```php
+$columnFilter->setFilterType(
+    PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_FILTERTYPE_DYNAMICFILTER
+);
+```
+
+When defining the rule for a dynamic filter, we don't define a value (we can simply set that to NULL) but we do specify the dynamic filter category.
+
+```php
+$columnFilter->createRule()
+    ->setRule(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL,
+        NULL,
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_DYNAMIC_YEARTODATE
+    )
+    ->setRuleType(
+        PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_DYNAMICFILTER
+    );
+```
+
+We also set the rule type to DYNAMICFILTER.
+
+The valid set of dynamic filter categories is defined in the PHPExcel_Worksheet_AutoFilter_Column_Rule class, and comprises:
+
+    Operator Constant                        | Value          |
+    -----------------------------------------|----------------|
+    AUTOFILTER_RULETYPE_DYNAMIC_YESTERDAY    | 'yesterday'    |
+    AUTOFILTER_RULETYPE_DYNAMIC_TODAY        | 'today'        |
+    AUTOFILTER_RULETYPE_DYNAMIC_TOMORROW     | 'tomorrow'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_YEARTODATE   | 'yearToDate'   |
+    AUTOFILTER_RULETYPE_DYNAMIC_THISYEAR     | 'thisYear'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_THISQUARTER  | 'thisQuarter'  |
+    AUTOFILTER_RULETYPE_DYNAMIC_THISMONTH    | 'thisMonth'    |
+    AUTOFILTER_RULETYPE_DYNAMIC_THISWEEK     | 'thisWeek'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_LASTYEAR     | 'lastYear'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_LASTQUARTER  | 'lastQuarter'  |
+    AUTOFILTER_RULETYPE_DYNAMIC_LASTMONTH    | 'lastMonth'    |
+    AUTOFILTER_RULETYPE_DYNAMIC_LASTWEEK     | 'lastWeek'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_NEXTYEAR     | 'nextYear'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_NEXTQUARTER  | 'nextQuarter'  |
+    AUTOFILTER_RULETYPE_DYNAMIC_NEXTMONTH    | 'nextMonth'    |
+    AUTOFILTER_RULETYPE_DYNAMIC_NEXTWEEK     | 'nextWeek'     |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_1      | 'M1'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_JANUARY      | 'M1'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_2      | 'M2'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_FEBRUARY     | 'M2'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_3      | 'M3'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MARCH        | 'M3'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_4      | 'M4'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_APRIL        | 'M4'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_5      | 'M5'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MAY          | 'M5'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_6      | 'M6'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_JUNE         | 'M6'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_7      | 'M7'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_JULY         | 'M7'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_8      | 'M8'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_AUGUST       | 'M8'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_9      | 'M9'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_SEPTEMBER    | 'M9'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_10     | 'M10'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_OCTOBER      | 'M10'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_11     | 'M11'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_NOVEMBER     | 'M11'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_MONTH_12     | 'M12'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_DECEMBER     | 'M12'          |
+    AUTOFILTER_RULETYPE_DYNAMIC_QUARTER_1    | 'Q1'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_QUARTER_2    | 'Q2'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_QUARTER_3    | 'Q3'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_QUARTER_4    | 'Q4'           |
+    AUTOFILTER_RULETYPE_DYNAMIC_ABOVEAVERAGE | 'aboveAverage' |
+    AUTOFILTER_RULETYPE_DYNAMIC_BELOWAVERAGE | 'belowAverage' |
+
+We can only apply a single Dynamic Filter rule to a column at a time.
+