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function pathinfo (path, options) {
    // Returns information about a certain string  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/pathinfo    // +   original by: Nate
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    improved by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: Inspired by actual PHP source: php5-5.2.6/ext/standard/string.c line #1559
    // %        note 1: The way the bitwise arguments are handled allows for greater flexibility    // %        note 1: & compatability. We might even standardize this code and use a similar approach for
    // %        note 1: other bitwise PHP functions
    // %        note 2: php.js tries very hard to stay away from a core.js file with global dependencies, because we like
    // %        note 2: that you can just take a couple of functions and be on your way.
    // %        note 2: But by way we implemented this function, if you want you can still declare the PATHINFO_*    // %        note 2: yourself, and then you can use: pathinfo('/www/index.html', PATHINFO_BASENAME | PATHINFO_EXTENSION);
    // %        note 2: which makes it fully compliant with PHP syntax.
    // -    depends on: dirname
    // -    depends on: basename
    // *     example 1: pathinfo('/www/htdocs/index.html', 1);    // *     returns 1: '/www/htdocs'
    // *     example 2: pathinfo('/www/htdocs/index.html', 'PATHINFO_BASENAME');
    // *     returns 2: 'index.html'
    // *     example 3: pathinfo('/www/htdocs/index.html', 'PATHINFO_EXTENSION');
    // *     returns 3: 'html'    // *     example 4: pathinfo('/www/htdocs/index.html', 'PATHINFO_FILENAME');
    // *     returns 4: 'index'
    // *     example 5: pathinfo('/www/htdocs/index.html', 2 | 4);
    // *     returns 5: {basename: 'index.html', extension: 'html'}
    // *     example 6: pathinfo('/www/htdocs/index.html', 'PATHINFO_ALL');    // *     returns 6: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}
    // *     example 7: pathinfo('/www/htdocs/index.html');
    // *     returns 7: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}
    // Working vars
    var opt = '',        optName = '',
        optTemp = 0,
        tmp_arr = {},
        cnt = 0,
        i = 0;    var have_basename = false,
        have_extension = false,
        have_filename = false;
 
    // Input defaulting & sanitation    if (!path) {
        return false;
    }
    if (!options) {
        options = 'PATHINFO_ALL';    }
 
    // Initialize binary arguments. Both the string & integer (constant) input is
    // allowed
    var OPTS = {        'PATHINFO_DIRNAME': 1,
        'PATHINFO_BASENAME': 2,
        'PATHINFO_EXTENSION': 4,
        'PATHINFO_FILENAME': 8,
        'PATHINFO_ALL': 0    };
    // PATHINFO_ALL sums up all previously defined PATHINFOs (could just pre-calculate)
    for (optName in OPTS) {
        OPTS.PATHINFO_ALL = OPTS.PATHINFO_ALL | OPTS[optName];
    }    if (typeof options !== 'number') { // Allow for a single string or an array of string flags
        options = [].concat(options);
        for (i = 0; i < options.length; i++) {
            // Resolve string input to bitwise e.g. 'PATHINFO_EXTENSION' becomes 4
            if (OPTS[options[i]]) {                optTemp = optTemp | OPTS[options[i]];
            }
        }
        options = optTemp;
    } 
    // Internal Functions
    var __getExt = function (path) {
        var str = path + '';
        var dotP = str.lastIndexOf('.') + 1;        return str.substr(dotP);
    };
 
 
    // Gather path infos    if (options & OPTS.PATHINFO_DIRNAME) {
        tmp_arr.dirname = this.dirname(path);
    }
 
    if (options & OPTS.PATHINFO_BASENAME) {        if (false === have_basename) {
            have_basename = this.basename(path);
        }
        tmp_arr.basename = have_basename;
    } 
    if (options & OPTS.PATHINFO_EXTENSION) {
        if (false === have_basename) {
            have_basename = this.basename(path);
        }        if (false === have_extension) {
            have_extension = __getExt(have_basename);
        }
        tmp_arr.extension = have_extension;
    } 
    if (options & OPTS.PATHINFO_FILENAME) {
        if (false === have_basename) {
            have_basename = this.basename(path);
        }        if (false === have_extension) {
            have_extension = __getExt(have_basename);
        }
        if (false === have_filename) {
            have_filename = have_basename.substr(0, (have_basename.length - have_extension.length) - 1);        }
 
        tmp_arr.filename = have_filename;
    }
  
    // If array contains only 1 element: return string
    cnt = 0;
    for (opt in tmp_arr) {
        cnt++;    }
    if (cnt == 1) {
        return tmp_arr[opt];
    }
     // Return full-blown array
    return tmp_arr;
}

1

pathinfo('/www/htdocs/index.html', 1);

1

'/www/htdocs'

1

pathinfo('/www/htdocs/index.html', 'PATHINFO_BASENAME');

1

'index.html'