Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > Example of application of function is_file() in PHP to determine whether a file is

Example of application of function is_file() in PHP to determine whether a file is

WBOY
Release： 2016-07-25 09:00:46
Original
901 people have browsed it
  2. var_dump(is_file('a_file.txt')) . "n";
  3. var_dump(is_file('/usr/bin/')) . "n";
  4. ?>
复制代码

输出： bool(true) bool(false)

例2：

  2. function isfile($file){
  3. return preg_match('/^[^.^:^?^-][^:^?]*.(?i)' . getexts() . '$/',$file);
  4. //first character cannot be . : ? - subsequent characters can't be a : ?
  5. //then a . character and must end with one of your extentions
  6. //getexts() can be replaced with your extentions pattern
  7. }
  8. function getexts(){
  9. //list acceptable file extensions here
  10. return '(app|avi|doc|docx|exe|ico|mid|midi|mov|mp3|
  11. mpg|mpeg|pdf|psd|qt|ra|ram|rm|rtf|txt|wav|word|xls)';
  12. }
  13. echo isfile('/Users/YourUserName/Sites/index.html');
  14. ?>
复制代码

例3：

  2. function deletefolder($path)
  3. {
  4. if ($handle=opendir($path))
  5. {
  6. while (false!==($file=readdir($handle)))
  7. {
  8. if ($file<>"." AND $file<>"..")
  9. {
  10. if (is_file($path.'/'.$file))
  11. {
  12. @unlink($path.'/'.$file);
  13. }
  14. if (is_dir($path.'/'.$file))
  15. {
  16. deletefolder($path.'/'.$file);
  17. @rmdir($path.'/'.$file);
  18. }
  19. }
  20. }
  21. }
  22. }
  23. ?>
复制代码


Related labels：
php 判断是否一个文件的函数is_file()应用举例
source：php.cn
Previous article：An example of PHP ID card regular verification (compatible with 15 and 18-digit ID cards) code Next article：How to get file suffix (extension) in php
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...
From 2024-04-29 11:01:01
0
3
2221
How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?
From 2024-04-23 00:22:19
0
11
2363
The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.
From 2024-04-19 15:37:47
0
1
1976
There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...
From 2024-04-18 23:52:34
0
1
1862
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0
0
1931
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template