phpjs/workbench/errorfunc/debug_backtrace.js

php.js offers community built php functions in javascript

function debug_backtrace(provide_object) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // %          note 1: Mozilla only
  // %          note 2: Since "function" is a reserved word in JavaScript (even as a property), you must use
  // %          note 2:   the ['function'] notation to get the returned object's arrays' "function" property name
  // *     example 1: function test () {var b = debug_backtrace();return b[0]['function'];}
  // *     example 1: test();
  // *     returns 1: 'test'

  var funcName, line, file, fileLine = '', lastColonPos = -1,
      className, object, type,
      args = Array.prototype.slice.call(arguments),
      olderFunc,
      i = 0,
      backtraceArray = [], olderArgs = arguments,
      stackItem = '',
      lastAtPos = -1, firstParenthPos = -1;
  var getFuncName = function(fn) {
    var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
    if (!name) {
      return '(Anonymous)';
    }
    return name[1];
  };


  // (void 0) is undefined in argument list
  try {
    throw new Error();
  }
  catch (e) {
    var stackArr = e.stack.replace(/\n$/, '').split('\n').slice(2);
  }
  // a()@file:///C:/Users/Brett/Desktop/PHP_JS/debug_backtrace.xul:7,@file:///C:/Users/Brett/Desktop/PHP_JS/debug_backtrace.xul:16

  for (i = 0; i < stackArr.length; i++) {
    stackItem = stackArr[i];

    // Will not work if parentheses (or ampersands) are in the file name! (other option would be worse, as arguments couldn't have @ or )
    lastAtPos = stackItem.lastIndexOf('@') + 1;
    fileLine = stackItem.slice(lastAtPos);
    lastColonPos = fileLine.lastIndexOf(':') + 1;
    line = fileLine.slice(lastColonPos);
    file = fileLine.slice(0, lastColonPos - 1);

    //firstParenthPos = stackItem.indexOf('(')-1;
    //funcName = stackItem.slice(0, firstParenthPos);

    if (stackItem[0] === '@') { // this is global scope (must be i >= 1)
      // Fix: can add support for included/required files?
      // Fix: arguments returned are mismatched? ignore the last line number/call, since is call to debug_backtrace()?
      continue; // delete this when fix
    }
    else {
      olderArgs = olderArgs.callee.caller.arguments;
      args = Array.prototype.slice.call(olderArgs);
      olderFunc = olderFunc ? olderFunc.caller : arguments.callee.caller;
      funcName = getFuncName(olderFunc);
    }
    className = ''; // Not supported
    type = ''; // Special '->' and '::' values not supported for method or static methods
    object = ''; // Not supported
    if (provide_object) {
      throw 'provide_object argument is not supported in debug_backtrace';
    }

    backtraceArray.push({
      'function': funcName, // string; The current function name. See also __FUNCTION__.
      'line': line, // integer; The current line number. See also __LINE__.
      'file' : file, // string; The current file name. See also __FILE__.
      'className' : className, // string; The current class name. See also __CLASS__
      'object' : object, // object; The current object.
      'type' : type, // string; The current call type. If a method call, "->" is returned. If a static method call, "::" is returned. If a function call, nothing is returned.
      'args' : args // array; If inside a function, this lists the functions arguments. If inside an included file, this lists the included file name(s).
    });
  }
  return backtraceArray;
}