fnmatch
(PHP 4 >= 4.3.0, PHP 5)
fnmatch — Match filename against a pattern
Description
$pattern
, string $string
[, int $flags = 0
] )
fnmatch() checks if the passed string would
match the given shell wildcard pattern.
Parameters
-
pattern -
The shell wildcard pattern.
-
string -
The tested string. This function is especially useful for filenames, but may also be used on regular strings.
The average user may be used to shell patterns or at least in their simplest form to '?' and '*' wildcards so using fnmatch() instead of preg_match() for frontend search expression input may be way more convenient for non-programming users.
-
flags -
The value of
flagscan be any combination of the following flags, joined with the binary OR (|) operator.A list of possible flags for fnmatch() FlagDescription FNM_NOESCAPEDisable backslash escaping. FNM_PATHNAMESlash in string only matches slash in the given pattern. FNM_PERIODLeading period in string must be exactly matched by period in the given pattern. FNM_CASEFOLDCaseless match. Part of the GNU extension.
Return Values
Returns TRUE if there is a match, FALSE otherwise.
Changelog
| Version | Description |
|---|---|
| 5.3.0 | This function is now available on Windows platforms. |
Examples
Example #1 Checking a color name against a shell wildcard pattern
<?php
if (fnmatch("*gr[ae]y", $color)) {
echo "some form of gray ...";
}
?>
Notes
For now, this function is not available on non-POSIX compliant systems except Windows.
See Also
- glob() - Find pathnames matching a pattern
- preg_match() - Perform a regular expression match
- sscanf() - Parses input from a string according to a format
- printf() - Output a formatted string
- sprintf() - Return a formatted string
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с файловой системой
- Функции для работы с файловой системой
- basename
- chgrp
- chmod
- chown
- clearstatcache
- copy
- delete
- dirname
- disk_free_space
- disk_total_space
- diskfreespace
- fclose
- feof
- fflush
- fgetc
- fgetcsv
- fgets
- fgetss
- file_exists
- file_get_contents
- file_put_contents
- file
- fileatime
- filectime
- filegroup
- fileinode
- filemtime
- fileowner
- fileperms
- filesize
- filetype
- flock
- fnmatch
- fopen
- fpassthru
- fputcsv
- fputs
- fread
- fscanf
- fseek
- fstat
- ftell
- ftruncate
- fwrite
- glob
- is_dir
- is_executable
- is_file
- is_link
- is_readable
- is_uploaded_file
- is_writable
- is_writeable
- lchgrp
- lchown
- link
- linkinfo
- lstat
- mkdir
- move_uploaded_file
- parse_ini_file
- parse_ini_string
- pathinfo
- pclose
- popen
- readfile
- readlink
- realpath_cache_get
- realpath_cache_size
- realpath
- rename
- rewind
- rmdir
- set_file_buffer
- stat
- symlink
- tempnam
- tmpfile
- touch
- umask
- unlink
Коментарии
you couls also try this function that I wrote before I found fnmatch:
function WildToReg($str)
{
$s = "";
for ($i = 0; $i < strlen($str); $i++)
{
$c = $str{$i};
if ($c =='?')
$s .= '.'; // any character
else if ($c == '*')
$s .= '.*'; // 0 or more any characters
else if ($c == '[' || $c == ']')
$s .= $c; // one of characters within []
else
$s .= '\\' . $c;
}
$s = '^' . $s . '$';
//trim redundant ^ or $
//eg ^.*\.txt$ matches exactly the same as \.txt$
if (substr($s,0,3) == "^.*")
$s = substr($s,3);
if (substr($s,-3,3) == ".*$")
$s = substr($s,0,-3);
return $s;
}
if (ereg(WildToReg("*.txt"), $fn))
print "$fn is a text file";
else
print "$fn is not a text file";
soywiz's function didnt seem to work for me, but this did.
<?php
if(!function_exists('fnmatch')) {
function fnmatch($pattern, $string) {
return preg_match("#^".strtr(preg_quote($pattern, '#'), array('\*' => '.*', '\?' => '.'))."$#i", $string);
} // end
} // end if
?>
soywiz's function still doesn't seem to work -- at least not with PHP 5.2.3 on Windows -- but jk's does.About the windows compat functions below:I needed fnmatch for a application that had to work on Windows, took a look here and tested both. Jk's works for me, soywiz didn't (on WinXPSP2, PHP 5.2.3).
The only difference between them is addcslashes (soywiz) instead of preg_quote (jk). They _should_ both work, but for some reason soywiz's didn't for me. So YMMV.
However, to make JK's fnmatch() work with the example in the documentation, you also have to strtr the [ and ] in $pattern.
<?php
$pattern = strtr(preg_quote($pattern, '#'), array('\*' => '.*', '\?' => '.', '\[' => '[', '\]' => ']'));
?>
And thanks for the functions, guys.
An addition to my previous note: My statement regarding the FNM_* constants was wrong. They are available on POSIX-compliant systems (in other words, if fnmatch() is defined).Here's a definitive solution, which supports negative character classes and the four documented flags.
<?php
if (!function_exists('fnmatch')) {
define('FNM_PATHNAME', 1);
define('FNM_NOESCAPE', 2);
define('FNM_PERIOD', 4);
define('FNM_CASEFOLD', 16);
function fnmatch($pattern, $string, $flags = 0) {
return pcre_fnmatch($pattern, $string, $flags);
}
}
function pcre_fnmatch($pattern, $string, $flags = 0) {
$modifiers = null;
$transforms = array(
'\*' => '.*',
'\?' => '.',
'\[\!' => '[^',
'\[' => '[',
'\]' => ']',
'\.' => '\.',
'\\' => '\\\\'
);
// Forward slash in string must be in pattern:
if ($flags & FNM_PATHNAME) {
$transforms['\*'] = '[^/]*';
}
// Back slash should not be escaped:
if ($flags & FNM_NOESCAPE) {
unset($transforms['\\']);
}
// Perform case insensitive match:
if ($flags & FNM_CASEFOLD) {
$modifiers .= 'i';
}
// Period at start must be the same as pattern:
if ($flags & FNM_PERIOD) {
if (strpos($string, '.') === 0 && strpos($pattern, '.') !== 0) return false;
}
$pattern = '#^'
. strtr(preg_quote($pattern, '#'), $transforms)
. '$#'
. $modifiers;
return (boolean)preg_match($pattern, $string);
}
?>
This probably needs further testing, but it seems to function identically to the native fnmatch implementation.
There is a problem within the pcre_fnmatch-Function concerning backslashes. Those will be masked by preq_quote and ADDITONALLY by the strtr if FN_NOESCAPE is not set -> something like "*a(*" will finally result in "#^.*a\\(.*$#". Note the double backslash which effectively does NOT mask the "(" correctly.
Since preq_quote always matches a backslash I don't think that this'll work with using preg_quote at all.