Php file extension

Php file extension

// Get the file suffix // By bbs.it-home.org $ File_name = "jbxue.com.txt "; Echo get_exname ($ file_name ); /** * Get the file extension * @ Param unknown_type $ file_name * @ Return $ ex_name */ Function get_exname ($ file_name) { If (empty ($ file_name )) Return false; $ File_name = strtolower ($ file_name ); $ Rev_str = strrev ($ file_name ); $ Ex_name_len = strpos ($ rev_str, '.'); // The length of the extension. $ File_name_len = strlen ($ file_name ); $ Ex_name = substr ($ file_name, $ file_name_len-$ ex_name_len ); Return $ ex_name; } ?> Function explanation: the strtolower () function converts a string to lowercase. The strrev () function reverses the string. The strpos () function returns the position where the string first appears in another string. Find the position of the symbol '.' and calculate the length of the extension. Use the total length of the string minus the extension length to calculate the length to be truncated. Looking back, we have introduced multiple methods to get file extensions: three methods for php to get file extensions (available version) php file extension retrieval methods summary php three methods for getting File extensions php 5 methods for getting File extensions one method for getting File extensions php user-defined functions php for getting file extensions to the front of happiness, may you find the sunshine on your way to learning at the programmer's home, so that you can spend a great time in your young and colorful life.