PHP code example for batch delete, clear UTF-8 file BOM header

This article mainly introduces PHP batch delete, clear the UTF-8 file BOM header code instance, need friends can refer to remember to run the code before the file backup Oh, to avoid failure.

Code 1:
The code is as follows:
Function checkBOM ($ filename ){
Global $ auto;
$ Contents = file_get_contents ($ filename );
$ Charset [1] = substr ($ contents, 0, 1 );
$ Charset [2] = substr ($ contents, 1, 1 );
$ Charset [3] = substr ($ contents, 2, 1 );
If (ord ($ charset [1]) = 239 & ord ($ charset [2]) = 187 & ord ($ charset [3]) = 191) {
If ($ auto = 1 ){
$ Rest = substr ($ contents, 3 );
Rewrite ($ filename, $ rest );
Return ("BOM found, automatically removed .");
} Else {
Return ("BOM found .");
}
}
Else return ("BOM Not Found .");
}

Code 2:
The code is as follows:
Header ('content-Type: text/html; charset = utf-8 ');
If (isset ($ _ GET ['dir']) {// sets the file directory. if it is not set, it is automatically set to the directory where the current file is located.
$ Basedir = $ _ GET ['dir'];
} Else {
$ Basedir = '.';
}
$ Auto = 1;/* set to 1: Check BOM and remove it. set to 0: check BOM only */

Echo 'The directory Currently searched is: '. $ basedir.' the current setting is :';
Echo $ auto? 'Check the file BOM while removing the BOM of the detected BOM file
':' Only checks the file BOM and does not delete the BOM.
';

Checkdir ($ basedir );
Function checkdir ($ basedir ){
If ($ dh = opendir ($ basedir )){
While ($ file = readdir ($ dh ))! = False ){
If ($ file! = '.' & $ File! = '..'){
If (! Is_dir ($ basedir. '/'. $ file )){
Echo 'File: '. $ basedir.'/'. $ file. checkBOM ($ basedir.'/'. $ file ).'
';
} Else {
$ Dirname = $ basedir. '/'. $ file;
Checkdir ($ dirname );
}
}
}
Closedir ($ dh );
}
}
Function checkBOM ($ filename ){
Global $ auto;
$ Contents = file_get_contents ($ filename );
$ Charset [1] = substr ($ contents, 0, 1 );
$ Charset [2] = substr ($ contents, 1, 1 );
$ Charset [3] = substr ($ contents, 2, 1 );
If (ord ($ charset [1]) = 239 & ord ($ charset [2]) = 187 & ord ($ charset [3]) = 191) {
If ($ auto = 1 ){
$ Rest = substr ($ contents, 3 );
Rewrite ($ filename, $ rest );
Return ('found BOM and removed automatically ');
} Else {
Return ('find BOM ');
}
} Else {
Return ('Bom not found ');
}
}
Function rewrite ($ filename, $ data ){
$ Filenum = fopen ($ filename, 'w ');
Flock ($ filenum, LOCK_EX );
Fwrite ($ filenum, $ data );
Fclose ($ filenum );
}
?>

Code 3:
The code is as follows:
# Place the file in the directory where the BOM header needs to be removed.
If (isset ($ _ GET ['dir']) {// config the basedir
$ Basedir = $ _ GET ['dir'];
} Else {
$ Basedir = '.';
}

$ Auto = 1;

Checkdir ($ basedir );
Function checkdir ($ basedir ){
If ($ dh = opendir ($ basedir )){
While ($ file = readdir ($ dh ))! = False ){
If ($ file! = '.' & $ File! = '..'){
If (! Is_dir ($ basedir. "/". $ file) {// if the file is
Echo "filename: $ basedir/$ file". checkBOM ("$ basedir/$ file ")."
";
} Else {
$ Dirname = $ basedir. "/". $ file; // if it is a directory
Checkdir ($ dirname); // recursion
}
}
}
Closedir ($ dh );
}
}
Function checkBOM ($ filename ){
Global $ auto;
$ Contents = file_get_contents ($ filename );
$ Charset [1] = substr ($ contents, 0, 1 );
$ Charset [2] = substr ($ contents, 1, 1 );
$ Charset [3] = substr ($ contents, 2, 1 );
If (ord ($ charset [1]) = 239 & ord ($ charset [2]) = 187 & ord ($ charset [3]) = 191) {// BOM
// ASCII of the first three characters
// The codes are
// 239
// 187
// 191
If ($ auto = 1 ){
$ Rest = substr ($ contents, 3 );
Rewrite ($ filename, $ rest );
Return ("BOM found, automatically removed .");
} Else {
Return ("BOM found .");
}
} Else
Return ("BOM Not Found .");
}
Function rewrite ($ filename, $ data ){
$ Filenum = fopen ($ filename, "w ");
Flock ($ filenum, LOCK_EX );
Fwrite ($ filenum, $ data );
Fclose ($ filenum );
}
?>

II. Python
The code is as follows:
#! /Usr/bin/env python
#-*-Coding: UTF-8 -*-

Import OS

Def delBOM ():
File_count = 0
Bom_files = []

For dirpath, dirnames, filenames in OS. walk ('.'):
If (len (filenames )):
For filename in filenames:
File_count + = 1
File = open (dirpath + "/" + filename, 'R + ')
File_contents = file. read ()

If (len (file_contents)> 3 ):
If (ord (file_contents [0]) = 239 and ord (file_contents [1]) = 187 and ord (file_contents [2]) = 191 ):
Bom_files.append (dirpath + "/" + filename)
File. seek (0)
File. write (file_contents [3:])
Print bom_files [-1], "BOM found. Deleted ."
File. close ()

Print file_count, "file (s) found.", len (bom_files), "file (s) have a bom. Deleted ."

If _ name _ = "_ main __":
DelBOM ()