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admin/class/Export/ExportDataExcel.php

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+<?php
+
+namespace Export;
+
+/**
+ * ExportDataExcel exports data into an XML format  (spreadsheetML) that can be
+ * read by MS Excel 2003 and newer as well as OpenOffice.
+ *
+ * Creates a workbook with a single worksheet (title specified by
+ * $title).
+ *
+ * Note that using .XML is the "correct" file extension for these files, but it
+ * generally isn't associated with Excel. Using .XLS is tempting, but Excel 2007 will
+ * throw a scary warning that the extension doesn't match the file type.
+ *
+ * Based on Excel XML code from Excel_XML (http://github.com/oliverschwarz/php-excel)
+ *  by Oliver Schwarz
+ */
+class ExportDataExcel extends ExportData
+{
+    public const XmlHeader = "<?xml version=\"1.0\" encoding=\"%s\"?\>\n<Workbook xmlns=\"urn:schemas-microsoft-com:office:spreadsheet\" xmlns:x=\"urn:schemas-microsoft-com:office:excel\" xmlns:ss=\"urn:schemas-microsoft-com:office:spreadsheet\" xmlns:html=\"http://www.w3.org/TR/REC-html40\">";
+    public const XmlFooter = '</Workbook>';
+
+    public $encoding = 'UTF-8'; // encoding type to specify in file.
+    // Note that you're on your own for making sure your data is actually encoded to this encoding
+    public $title = 'Sheet1'; // title for Worksheet
+
+    public function generateHeader()
+    {
+        // workbook header
+        $output = stripslashes(sprintf(self::XmlHeader, $this->encoding))."\n";
+
+        // Set up styles
+        $output .= "<Styles>\n";
+        $output .= "<Style ss:ID=\"sDT\"><NumberFormat ss:Format=\"Short Date\"/></Style>\n";
+        $output .= "</Styles>\n";
+
+        // worksheet header
+        $output .= sprintf("<Worksheet ss:Name=\"%s\">\n    <Table>\n", htmlentities($this->title));
+
+        return $output;
+    }
+
+    public function generateFooter()
+    {
+        $output = '';
+
+        // worksheet footer
+        $output .= "    </Table>\n</Worksheet>\n";
+
+        // workbook footer
+        $output .= self::XmlFooter;
+
+        return $output;
+    }
+
+    public function generateRow($row)
+    {
+        $output = '';
+        $output .= "        <Row>\n";
+        foreach ($row as $k => $v) {
+            $output .= $this->generateCell($v);
+        }
+        $output .= "        </Row>\n";
+
+        return $output;
+    }
+
+    private function generateCell($item)
+    {
+        $output = '';
+        $style = '';
+
+        // Tell Excel to treat as a number. Note that Excel only stores roughly 15 digits, so keep
+        // as text if number is longer than that.
+        if (preg_match("/^-?\d+(?:[.,]\d+)?$/", $item) && (strlen($item) < 15)) {
+            $type = 'Number';
+        }
+        // Sniff for valid dates; should look something like 2010-07-14 or 7/14/2010 etc. Can
+        // also have an optional time after the date.
+        //
+        // Note we want to be very strict in what we consider a date. There is the possibility
+        // of really screwing up the data if we try to reformat a string that was not actually
+        // intended to represent a date.
+        elseif (preg_match("/^(\d{1,2}|\d{4})[\/\-]\d{1,2}[\/\-](\d{1,2}|\d{4})([^\d].+)?$/", $item)
+                && ($timestamp = strtotime($item))
+                && ($timestamp > 0)
+                && ($timestamp < strtotime('+500 years'))) {
+            $type = 'DateTime';
+            $item = strftime('%Y-%m-%dT%H:%M:%S', $timestamp);
+            $style = 'sDT'; // defined in header; tells excel to format date for display
+        } else {
+            $type = 'String';
+        }
+
+        $item = str_replace('&#039;', '&apos;', htmlspecialchars($item, ENT_QUOTES));
+        $output .= '            ';
+        $output .= $style ? "<Cell ss:StyleID=\"{$style}\">" : '<Cell>';
+        $output .= sprintf('<Data ss:Type="%s">%s</Data>', $type, $item);
+        $output .= "</Cell>\n";
+
+        return $output;
+    }
+
+    public function sendHttpHeaders()
+    {
+        header('Content-Type: application/vnd.ms-excel; charset='.$this->encoding);
+        header('Content-Disposition: inline; filename="'.basename($this->filename).'"');
+    }
+}