方法1: function get_file_type($filename){ $type = substr($filename, strrpos($filename, ".")+1); return $type; } 方法2: function get_file_type($filename) { $type = pathinfo($filename); $type = strtolower($type["extension"]); return $type; } 方法3: function get_file_type($filename) { $type =explode("." , $filename); $count=count($type)-1; return $type[$count]; }
方法4: function getExt1($filename) { $arr = explode('.',$filename); return array_pop($arr);; } 方法5: function getExt2($filename) { $ext = strrchr($filename,'.'); return $ext; } 方法6:
function getExt3($filename) { $pos = strrpos($filename, '.'); $ext = substr($filename, $pos); return $ext; } 方法7: function getExt4($filename) { $arr = pathinfo($filename); $ext = $arr['extension']; return $ext; } 方法8: function getExt5($filename) { $str = strrev($filename); return strrev(strchr($str,'.',true)); }