四种取得文件扩展名php代码
栏目:php教程时间:2013-10-19 08:51:47
- <?php
-
- function extend_1($file_name)
- {
- $retval="";
- $pt=strrpos($file_name, ".");
- if ($pt) $retval=substr($file_name, $pt+1, strlen($file_name) - $pt);
- return ($retval);
- }
- <?php
-
-
- php代码
- function extend_2($file_name)
- {
- $extend = pathinfo($file_name);
- $extend = strtolower($extend["extension"]);
- return $extend;
- }
- function extend_2($file_name) { $extend = pathinfo($file_name); $extend = strtolower($extend["extension"]); return $extend; }
-
-
- php代码
- function extend_3($file_name)
- {
- $extend =explode("." , $file_name);
- $va=count($extend)-1;
- return $extend[$va];
- }
- function extend_3($file_name) { $extend =explode("." , $file_name); $va=count($extend)-1; return $extend[$va]; }
-
-
- php代码
- function getfileext($file_name)
- {
- while($dot = strpos($file_name, "."))
- {
- $file_name = substr($file_name, $dot+1);
- }
- return $file_name;
- }
- ?>
- function getfileext($file_name) { while($dot = strpos($file_name, ".")) { $file_name = substr($file_name, $dot+1); } return $file_name; }
- ?>
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