PHP Mime类型检查替代方法吗？
发布时间：2020-12-13 13:10:32 所属栏目：PHP教程 来源：网络整理
导读：我注意到get_mime()现在已经折旧,那么创建以下函数的替代方法是什么？此功能通过我使用的cms使用,因此需要一个可靠的替代方案. // Mime Type Checkerfunction get_mime ($filename,$mode=0) { // mode 0 = full check // mode 1 = extension check only $mim
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我注意到get_mime()现在已经折旧,那么创建以下函数的替代方法是什么？此功能通过我使用的cms使用,因此需要一个可靠的替代方案.
// Mime Type Checker
function get_mime ($filename,$mode=0) {
// mode 0 = full check
// mode 1 = extension check only
$mime_types = array(
'txt' => 'text/plain','htm' => 'text/html','html' => 'text/html','php' => 'text/html','css' => 'text/css','js' => 'application/javascript','json' => 'application/json','xml' => 'application/xml','swf' => 'application/x-shockwave-flash','flv' => 'video/x-flv',// images
'png' => 'image/png','jpe' => 'image/jpeg','jpeg' => 'image/jpeg','jpg' => 'image/jpeg','gif' => 'image/gif','bmp' => 'image/bmp','ico' => 'image/vnd.microsoft.icon','tiff' => 'image/tiff','tif' => 'image/tiff','svg' => 'image/svg+xml','svgz' => 'image/svg+xml',// archives
'zip' => 'application/zip','rar' => 'application/x-rar-compressed','exe' => 'application/x-msdownload','msi' => 'application/x-msdownload','cab' => 'application/vnd.ms-cab-compressed',// audio/video
'mp3' => 'audio/mpeg','qt' => 'video/quicktime','mov' => 'video/quicktime',// adobe
'pdf' => 'application/pdf','psd' => 'image/vnd.adobe.photoshop','ai' => 'application/postscript','eps' => 'application/postscript','ps' => 'application/postscript',// ms office
'doc' => 'application/msword','rtf' => 'application/rtf','xls' => 'application/vnd.ms-excel','ppt' => 'application/vnd.ms-powerpoint','docx' => 'application/msword','xlsx' => 'application/vnd.ms-excel','pptx' => 'application/vnd.ms-powerpoint',// open office
'odt' => 'application/vnd.oasis.opendocument.text','ods' => 'application/vnd.oasis.opendocument.spreadsheet',);
$ext = strtolower(array_pop(explode('.',$filename)));
if (function_exists('mime_content_type') && $mode==0) {
$mimetype = mime_content_type($filename);
return $mimetype;
}
if (function_exists('finfo_open') && $mode==0) {
$finfo = finfo_open(FILEINFO_MIME);
$mimetype = finfo_file($finfo,$filename);
finfo_close($finfo);
return $mimetype;
} elseif (array_key_exists($ext,$mime_types)) {
return $mime_types[$ext];
} else {
return 'application/octet-stream';
}
}
finfo_file是mime_content_type的替代品.
由于finfo_file只能在PHP 5.3.0中使用,所以你所做的是正确的.如果finfo_file是可用的,那么使用它,否则回退到mime_content_type,如果我们不能使用finfo_file,这应该是可用的. 您应该像这样更新条件检查： if(function_exists('mime_content_type')&&$mode==0){
$mimetype = mime_content_type($filename);
return $mimetype;
}elseif(function_exists('finfo_open')&&$mode==0){
$finfo = finfo_open(FILEINFO_MIME);
$mimetype = finfo_file($finfo,$filename);
finfo_close($finfo);
return $mimetype;
}elseif(array_key_exists($ext,$mime_types)){
return $mime_types[$ext];
}else {
return 'application/octet-stream';
}
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