Viewing file:  mime.php (1.9 KB) -rw-rw-rw-
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<?php
/**
* Returns file mime type
*
* @param string $file
* @return string
*/
function w3_get_mime_type($file) {
static $cache = array();
if (!isset($cache[$file])) {
$mime_type = false;
/**
* Try to detect by extension (fast)
*/
$mime_types = include W3TC_INC_DIR . '/mime/all.php';
foreach ($mime_types as $extension => $type) {
if (preg_match('~\.(' . $extension . ')$~i', $file)) {
if (is_array($type))
$mime_type = array_pop($type);
else
$mime_type = $type;
break;
}
}
/**
* Try to detect using file info function
*/
if (!$mime_type && function_exists('finfo_open')) {
$finfo = @finfo_open(FILEINFO_MIME);
if (!$finfo) {
$finfo = @finfo_open(FILEINFO_MIME);
}
if ($finfo) {
$mime_type = @finfo_file($finfo, $file);
if ($mime_type) {
$extra_mime_type_info = strpos($mime_type, "; ");
if ($extra_mime_type_info) {
$mime_type = substr($mime_type, 0, $extra_mime_type_info);
}
if ($mime_type == 'application/octet-stream') {
$mime_type = false;
}
}
@finfo_close($finfo);
}
}
/**
* Try to detect using mime type function
*/
if (!$mime_type && function_exists('mime_content_type')) {
$mime_type = @mime_content_type($file);
}
/**
* If detection failed use default mime type
*/
if (!$mime_type) {
$mime_type = 'application/octet-stream';
}
$cache[$file] = $mime_type;
}
return $cache[$file];
}
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