JavaScript implements the number function of PHP print_r (three methods)_javascript skills

方法一

复制代码 代码如下:

function print_r(theObj) {
    var retStr = '';
    if (typeof theObj == 'object') {
        retStr = '

';
        for (var p in theObj) {
            if (typeof theObj[p] == 'object') {
                retStr = '

[' p '] => ' typeof(theObj) '

';
                retStr = '

' print_r(theObj[p]) '

';
            } else {
                retStr = '

[' p '] => ' theObj[p] '

';
            }
        }
        retStr = '

';
    }
    return retStr;
}

方法二

复制代码 代码如下:

$(document).ready(function(){
 $('#btn').click(function(){
   var jsonStr = $('#jsonData').val();
   var json = eval('(' jsonStr ')');
   (function(){
  var print_r = function(o, depth) {
    var result = '';
    depth || (depth=1);
    var indent = new Array(4*depth 1).join(' ');
    var indentNext = new Array(4*(depth 1) 1).join(' ');
    var indentNextTwo = new Array(4*(depth 2) 1).join(' ');
    var tmp = '';
    var type = typeof o;
    switch(type) {
   case 'string':
   case 'number':
   case 'boolean':
   case 'undefined':
   case 'function':
     tmp = indent indentNext o "n";
     break;
   case 'object':
   default:
     for(var key in o) {
    tmp = indentNextTwo '[' key '] = ';
    tmp = print_r(o[key], (depth 1));
     }
    }
    result = type "n";
    result = indentNext '(' "n";
    result = tmp;
    result = indentNext ')' "n";
    return result;
  };
  alert(print_r(json));
   }(json));
 });
});

方法三

复制代码 代码如下:

print_r:function(theObj) {
 var retStr = '';
 if (typeof theObj == 'object'||typeof theObj == 'array') {
  retStr = '

';
  for (var p in theObj) {
   if (typeof theObj[p] == 'object' || typeof theObj[p] == 'array') {
    retStr = '

[' p '] => ' typeof(theObj) '

';
    retStr = '

' XFUPLOAD.Tools.print_r(theObj[p]) '

';
   } else {
    retStr = '

[' p '] => ' theObj[p] '

';
   }
  }
  retStr = '

';
 }
 $("body").append(retStr);
}