Detector

The Detector class detects the type of an image from its content : WMF, EMF, EMF+ or unknown.

Constant	Value	Description
Detector::TYPE_WMF	wmf	WMF file (placeable or not)
Detector::TYPE_EMF	emf	EMF file
Detector::TYPE_EMFPLUS	emf+	EMF file containing EMF+ records
Detector::TYPE_UNKNOWN	unknown	Other file

EMF+ files

EMF+ files are EMF files whose first record (after the header) is a EMF+ header. EMF+ "dual" files contain a EMF fallback : they can be read by the EMF readers.

detect

The method returns the type of an image from its content.

<?php

use PhpOffice\WMF\Reader\Detector;

$type = Detector::detect(file_get_contents('sample.emf'));

echo 'The type of sample.emf is ' . $type;

detectFile

The method returns the type of an image file. Only the headers of the file are read.

<?php

use PhpOffice\WMF\Reader\Detector;

switch (Detector::detectFile('sample')) {
    case Detector::TYPE_WMF:
        $reader = new PhpOffice\WMF\Reader\WMF\Magic();
        break;
    case Detector::TYPE_EMF:
    case Detector::TYPE_EMFPLUS:
        $reader = new PhpOffice\WMF\Reader\EMF\Magic();
        break;
    default:
        throw new Exception('Not supported');
}
$reader->load('sample');

isWMF, isPlaceableWMF, isEMF & isEMFPlus

These methods return if the content is a WMF file (placeable or not), a placeable WMF file, a EMF file (including EMF+ files) or a EMF+ file.

<?php

use PhpOffice\WMF\Reader\Detector;

$content = file_get_contents('sample.emf');

var_dump(Detector::isWMF($content));
var_dump(Detector::isPlaceableWMF($content));
var_dump(Detector::isEMF($content));
var_dump(Detector::isEMFPlus($content));