Php prevents Image Trojans from being uploaded

Php prevents Image Trojans from being uploaded

 'No error occurs. the file is uploaded successfully. ', '1' =>' the uploaded file exceeds the limit of the upload_max_filesize option in php. ini. ', '2' =>' the size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form. ', '3' =>' only part of the file is uploaded. ', '4' =>' no file is uploaded. ', '5' =>' file failed to pass the security check. ', '6' =>' cannot find the temporary folder. ', '7' =>' file writing failed. ', '8' => 'File type not supported', '9' => 'the temporary file to be uploaded is lost. ',); // @ Start to execute the file upload public static function start ($ feild = 'file') {if (! Empty ($ _ FILES) {self: $ status = $ _ FILES [$ feild] ['error']; if (self: $ status> 0) return array ('status' => self: $ status, 'MSG '=> self: $ message [self: $ status]); self :: $ image = $ _ FILES [$ feild] ['tmp _ name']; self :: $ suffix = strtolower (strrchr ($ _ FILES [$ feild] ['name'], '. '); return array ('status' => self: _ upload (), 'path' => self: $ image, 'MSG' => self :: $ message [self ::$ status]);} else {return array ('status' => self: $ status, 'MSG '=> self :: $ message [self: $ status]) ;}// @ start private static function _ upload ($ path = '. /upload/') {date_default_timezone_set ('prc'); $ newFile = $ path. date ('Y/m/d/His '). rand (100,999 ). self: $ suffix; self: umkdir (dirname ($ newFile); if (is_uploaded_file (self: $ image) & move_uploaded_file (self: $ image, $ newFile) {self ::$ image = $ newFile; if (in_array (self ::$ suffix, self ::$ imageType) return self :: checkHex (); else return self: $ status = 0;} else {return self: $ status = 9 ;}/// @ private hexadecimal check private static function checkHex () {if (file_exists (self ::$ image) {$ resource = fopen (self ::$ image, 'RB'); $ fileSize = filesize (self :: $ image); fseek ($ resource, 0); if ($ fileSize> 512) {// Get the header and tail $ hexCode = bin2hex (fread ($ resource, 512 )); fseek ($ resource, $ fileSize-512); $ hexCode. = bin2hex (fread ($ resource, 512);} else {// retrieve all $ hexCode = bin2hex (fread ($ resource, $ fileSize ));} fclose ($ resource);/* matches <% () %> * // * matches in hexadecimal notation
 * // * Match the hexadecimal value