Javascript php_strip_whitespace : Miscellaneous Functions : PHP functions in JavaScript JAVASCRIPT TUTORIALS

function php_strip_whitespace (file) {
    // Return source with stripped comments and whitespace  
    // 
    // version: 901.2514
    // discuss at: http://phpjs.org/functions/php_strip_whitespace
    // +   original by: Brett Zamir
    // %        note 1: This function uses XmlHttpRequest and cannot retrieve resource from different domain.
    // %        note 1: Synchronous so may lock up browser, mainly here for study purposes.
    // %        note 1: To avoid browser blocking issues's consider using jQuery's: $('#divId').load('http://url') instead.
    // -    depends on: file_get_contents
    // *     example 1: php_strip_whitespace('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm');
    // *     returns 1: '123'
    try {
        var str = file_get_contents(file);
    } catch (e) {
        return '';
    }
    // Strip comments (both styles), reduce non-newline whitespace to one, reduce multiple
    // newlines (preceded by any whitespace) to a newline, remove WS at beginning of line,
    // and at end of line
    return str.replace(/\/\/.*?\n/g, '').replace(/\/\*[^]*?\*\//g, '').replace(/[ \f\r\t\v\u00A0\u2028\u2029]+/g, ' ').replace(/\s*\n+/g, '\n').replace(/^\s+/gm, '').replace(/\s*$/gm, '');
}