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Glob.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Finder;
013
014 /**
015 * Glob matches globbing patterns against text.
016 *
017 * if match_glob("foo.*", "foo.bar") echo "matched\n";
018 *
019 * // prints foo.bar and foo.baz
020 * $regex = glob_to_regex("foo.*");
021 * for (['foo.bar', 'foo.baz', 'foo', 'bar'] as $t)
022 * {
023 * if (/$regex/) echo "matched: $car\n";
024 * }
025 *
026 * Glob implements glob(3) style matching that can be used to match
027 * against text, rather than fetching names from a filesystem.
028 *
029 * Based on the Perl Text::Glob module.
030 *
031 * @author Fabien Potencier <fabien@symfony.com> PHP port
032 * @author Richard Clamp <richardc@unixbeard.net> Perl version
033 * @copyright 2004-2005 Fabien Potencier <fabien@symfony.com>
034 * @copyright 2002 Richard Clamp <richardc@unixbeard.net>
035 */
036 class Glob
037 {
038 /**
039 * Returns a regexp which is the equivalent of the glob pattern.
040 *
041 * @param string $glob The glob pattern
042 * @param bool $strictLeadingDot
043 * @param bool $strictWildcardSlash
044 * @param string $delimiter Optional delimiter
045 *
046 * @return string regex The regexp
047 */
048 public static function toRegex($glob, $strictLeadingDot = true, $strictWildcardSlash = true, $delimiter = '#')
049 {
050 $firstByte = true;
051 $escaping = false;
052 $inCurlies = 0;
053 $regex = '';
054 $sizeGlob = \strlen($glob);
055 for ($i = 0; $i < $sizeGlob; ++$i) {
056 $car = $glob[$i];
057 if ($firstByte && $strictLeadingDot && '.' !== $car) {
058 $regex .= '(?=[^\.])';
059 }
060
061 $firstByte = '/' === $car;
062
063 if ($firstByte && $strictWildcardSlash && isset($glob[$i + 2]) && '**' === $glob[$i + 1].$glob[$i + 2] && (!isset($glob[$i + 3]) || '/' === $glob[$i + 3])) {
064 $car = '[^/]++/';
065 if (!isset($glob[$i + 3])) {
066 $car .= '?';
067 }
068
069 if ($strictLeadingDot) {
070 $car = '(?=[^\.])'.$car;
071 }
072
073 $car = '/(?:'.$car.')*';
074 $i += 2 + isset($glob[$i + 3]);
075
076 if ('/' === $delimiter) {
077 $car = str_replace('/', '\\/', $car);
078 }
079 }
080
081 if ($delimiter === $car || '.' === $car || '(' === $car || ')' === $car || '|' === $car || '+' === $car || '^' === $car || '$' === $car) {
082 $regex .= "\\$car";
083 } elseif ('*' === $car) {
084 $regex .= $escaping ? '\\*' : ($strictWildcardSlash ? '[^/]*' : '.*');
085 } elseif ('?' === $car) {
086 $regex .= $escaping ? '\\?' : ($strictWildcardSlash ? '[^/]' : '.');
087 } elseif ('{' === $car) {
088 $regex .= $escaping ? '\\{' : '(';
089 if (!$escaping) {
090 ++$inCurlies;
091 }
092 } elseif ('}' === $car && $inCurlies) {
093 $regex .= $escaping ? '}' : ')';
094 if (!$escaping) {
095 --$inCurlies;
096 }
097 } elseif (',' === $car && $inCurlies) {
098 $regex .= $escaping ? ',' : '|';
099 } elseif ('\\' === $car) {
100 if ($escaping) {
101 $regex .= '\\\\';
102 $escaping = false;
103 } else {
104 $escaping = true;
105 }
106
107 continue;
108 } else {
109 $regex .= $car;
110 }
111 $escaping = false;
112 }
113
114 return $delimiter.'^'.$regex.'$'.$delimiter;
115 }
116 }
117