glob(pattern,flags)

Possible values:
可用值：

• GLOB_MARK - Adds a slash to each item returned
  GLOB_MARK – 给每一个返回的项填加一条斜杠（“/”）[slash]
• GLOB_NOSORT - Return files as they appear in the directory (unsorted)
  GLOB_NOSORT – 返回目录中的文件[不进行排序]
• GLOB_NOCHECK - Returns the search pattern if no match were found
  GLOB_NOCHECK – 如果没有与指定的模式向匹配的项，那么就返回这个样式
• GLOB_NOESCAPE - Backslashes do not quote metacharacters
  GLOB_NOESCAPE – 使用反斜杠（“”），不将元字符[metacharacter]放入引号内进行引证。
• GLOB_BRACE - Expands {a,b,c} to match 'a', 'b', or 'c'
  GLOB_BRACE – 使{a,b,c}与'a', 'b', 或 'c'相匹配
• GLOB_ONLYDIR - Return only directories which match the pattern
  GLOB_ONLYDIR – 只返回与指定样式相匹配的样式
• GLOB_ERR - (added in PHP 5.1) Stop on errors (errors are ignored by default)
  GLOB_ERR – 出现错误时停止（仅在PHP5.1以上版本支持。如果不设置这个参数，那么错误将被忽略）

<?php
print_r(glob("*.txt"));
?> 

Array
(
[0] => target.txt
[1] => source.txt
[2] => test.txt
[3] => test2.txt
)

<?php
print_r(glob("*.*"));
?> 

Array
(
[0] => contacts.csv
[1] => default.php
[2] => target.txt
[3] => source.txt
[4] => tem1.tmp
[5] => test.htm
[6] => test.ini
[7] => test.php
[8] => test.txt
[9] => test2.txt
)