<?php$file = @fopen('包含路径的文件名', "rb");$bin = fread($file, 15); //只读15字节 各个不同文件类型，头信息不一样。$flag = get_type_list($bin);if(!empty($flag)) { echo $flag;}else{ echo '不存在';} /*** 得到文件头与文件类型映射表** author wengxianhu* @param $bin string 图片的二进制前一段字符* @return boolean*/public function get_type_list($bin){ $flag = ''; $array = array( array("FFD8FFE1","jpg"), array("89504E47","png"), array("47494638","gif"), array("FFD8FFE000104A46", "jpeg")// array("49492A00","tif"),// array("424D","bmp"),// array("41433130","dwg"),// array("38425053","psd"),// array("7B5C727466","rtf"),// array("3C3F786D6C","xml"),// array("68746D6C3E","html"),// array("44656C69766572792D646174","eml"),// array("CFAD12FEC5FD746F","dbx"),// array("2142444E","pst"),// array("D0CF11E0","xls/doc"),// array("5374616E64617264204A","mdb"),// array("FF575043","wpd"),// array("252150532D41646F6265","eps/ps"),// array("255044462D312E","pdf"),// array("E3828596","pwl"),// array("504B0304","zip"),// array("52617221","rar"),// array("57415645","wav"),// array("41564920","avi"),// array("2E7261FD","ram"),// array("2E524D46","rm"),// array("000001BA","mpg"),// array("000001B3","mpg"),// array("6D6F6F76","mov"),// array("3026B2758E66CF11","asf"),// array("4D546864","mid"),// array("D3C3BBA7", 'csv') ); foreach ($array as $v) { $blen = strlen(pack("H*", $v[0])); //得到文件头标记字节数 $tbin = substr($bin, 0, intval($blen)); ///需要比较文件头长度 if(strtolower($v[0]) == strtolower(array_shift(unpack("H*", $tbin)))) { $flag = $v[1]; break; } } return $flag;}?>
