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14 years ago
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.
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