php解析json数据二种实例方法

大多数流行的 Web 服务如 twitter 通过开放 API 来提供数据一样，它总是能够知道如何解析 API 数据的各种传送格式，包括 JSON，XML 等等。

$json_string={"id":1,"name":"php100.com","email":"admin@php100.com,interest:[wordpress,php>admin@php100.com","interest":["wordpress","php"]} ;
$obj=json_decode($json_string);
echo $obj->name; //prints foo
echo $obj->interest[1]; //prints php

ecshop解析json类

if (!defined(EC_CHARSET))
{
define(EC_CHARSET, utf-8);
}

class JSON
{
var $at   = 0;
var $ch   = ;
var $text = ;

function encode($arg, $force = true)
{
static $_force;
if (is_null($_force))
{
$_force = $force;
}

if ($_force && EC_CHARSET == utf-8 && function_exists(json_encode))
{
return json_encode($arg);
}

$returnValue = ;
$c           = ;
$i           = ;
$l           = ;
$s           = ;
$v           = ;
$numeric     = true;

switch (gettype($arg))
{
case array:
foreach ($arg AS $i => $v)
{
if (!is_numeric($i))
{
$numeric = false;
break;
}
}

if ($numeric)
{
foreach ($arg AS $i => $v)
{
if (strlen($s) > 0)
{
$s .= ,;
}
$s .= $this->encode($arg[$i]);
}

$returnValue = [ . $s . ];
}
else
{
foreach ($arg AS $i => $v)
{
if (strlen($s) > 0)
{
$s .= ,;
}
$s .= $this->encode($i) . : . $this->encode($arg[$i]);
}

$returnValue = { . $s . };
}
break;

case object:
foreach (get_object_vars($arg) AS $i => $v)
{
$v = $this->encode($v);

if (strlen($s) > 0)
{
$s .= ,;
}
$s .= $this->encode($i) . : . $v;
}

$returnValue = { . $s . };
break;

case integer:
case double:
$returnValue = is_numeric($arg) ? (string) $arg : null;
break;

case string:
$returnValue = " . strtr($arg, array(
"r"   => r,    "n"   => n,    "t"   => t,     "b"   => b,
"f"   => f,       => ,   "    => ",
"x00" => u0000, "x01" => u0001, "x02" => u0002, "x03" => u0003,
"x04" => u0004, "x05" => u0005, "x06" => u0006, "x07" => u0007,
"x08" => b,     "x0b" => u000b, "x0c" => f,     "x0e" => u000e,
"x0f" => u000f, "x10" => u0010, "x11" => u0011, "x12" => u0012,
"x13" => u0013, "x14" => u0014, "x15" => u0015, "x16" => u0016,
"x17" => u0017, "x18" => u0018, "x19" => u0019, "x1a" => u001a,
"x1b" => u001b, "x1c" => u001c, "x1d" => u001d, "x1e" => u001e,
"x1f" => u001f
)) . ";
break;

case boolean:
$returnValue = $arg?true:false;
break;

default:
$returnValue = null;
}

return $returnValue;
}

function decode($text,$type=0) // 默认type=0返回obj,type=1返回array
{
if (empty($text))
{
return ;
}
elseif (!is_string($text))
{
return false;
}

if (EC_CHARSET === utf-8 && function_exists(json_decode))
{
return $this->addslashes_deep_obj(json_decode(striadmin@php100.com,interest:[wordpress,phplashes($text),$type));
}

$this->at   = 0;
$this->ch   = ;
$this->text = strtr(stripslashes($text), array(
"r"   => , "n"   => , "t"   => , "b"   => ,
"x00" => , "x01" => , "x02" => , "x03" => ,
"x04" => , "x05" => , "x06" => , "x07" => ,
"x08" => , "x0b" => , "x0c" => , "x0e" => ,
"x0f" => , "x10" => , "x11" => , "x12" => ,
"x13" => , "x14" => , "x15" => , "x16" => ,
"x17" => , "x18" => , "x19" => , "x1a" => ,
"x1b" => , "x1c" => , "x1d" => , "x1e" => ,
"x1f" =>
));

$this->next();
$return = $this->val();

$result = empty($type) ? $return : $this->object_to_array($return);

return addslashes_deep_obj($result);
}

/**
* triggers a PHP_ERROR
*
* @access   private
* @param    string    $m    error message
*
* @return   void
*/
function error($m)
{
trigger_error($m . at offset . $this->at . : . $this->text, E_USER_ERROR);
}

/**
* returns the next character of a JSON string
*
* @access  private
*
* @return  string
*/
function next()
{
$this->ch = !isset($this->text{$this->at}) ? : $this->text{$this->at};
$this->at++;

return $this->ch;
}

/**
* handles strings
*
* @access  private
*
* @return  void
*/
function str()
{
$i = ;
$s = ;
$t = ;
$u = ;

if ($this->ch == ")
{
while ($this->next() !== null)
{
if ($this->ch == ")
{
$this->next();

return $s;
}
elseif ($this->ch == )
{
switch ($this->next())
{
case b:
$s .= b;
break;

case f:
$s .= f;
break;

case n:
$s .= n;
break;

case r:
$s .= r;
break;

case t:
$s .= t;
break;

case u:
$u = 0;

for ($i = 0; $i < 4; $i++)
{
$t = (integer) sprintf(%01c, hexdec($this->next()));

if (!is_numeric($t))
{
break 2;
}
$u = $u * 16 + $t;
}

$s .= chr($u);
break;
case :
$s .= ;
break;
default:
$s .= $this->ch;
}
}
else
{
$s .= $this->ch;
}
}
}

$this->error(Bad string);
}

/**
* handless arrays
*
* @access  private
*
* @return  void
*/
function arr()
{
$a = array();

if ($this->ch == [)
{
$this->next();

if ($this->ch == ])
{
$this->next();

return $a;
}

while (isset($this->ch))
{
array_push($a, $this->val());

if ($this->ch == ])
{
$this->next();

return $a;

}
elseif ($this->ch != ,)
{
break;
}

$this->next();

}

$this->error(Bad array);
}
}

/**
* handles objects
*
* @access  public
*
* @return  void
*/
function obj()
{
$k = ;
$o = new StdClass();

if ($this->ch == {)
{
$this->next();

if ($this->ch == })
{
$this->next();

return $o;
}

while ($this->ch)
{
$k = $this->str();

if ($this->ch != :)
{
break;
}

$this->next();
$o->$k = $this->val();

if ($this->ch == })
{
$this->next();

return $o;
}
elseif ($this->ch != ,)
{
break;
}

$this->next();
}
}

$this->error(Bad object);
}

/**
* handles objects
*
* @access  public
*
* @return  void
*/
function assoc()
{
$k = ;
$a = array();

if ($this->ch == <)
{
$this->next();

if ($this->ch == >)
{
$this->next();

return $a;
}

while ($this->ch)
{
$k = $this->str();

if ($this->ch != :)
{
break;
}

$this->next();
$a[$k] = $this->val();

if ($this->ch == >)
{
$this->next();

return $a;
}
elseif ($this->ch != ,)
{
break;
}

$this->next();
}
}

$this->error(Bad associative array);
}

/**
* handles numbers
*
* @access  private
*
* @return  void
*/
function num()
{
$n = ;
$v = ;

if ($this->ch == -)
{
$n = -;
$this->next();
}

while ($this->ch >= 0 && $this->ch <= 9)
{
$n .= $this->ch;
$this->next();
}

if ($this->ch == .)
{
$n .= .;

while ($this->next() && $this->ch >= 0 && $this->ch <= 9)
{
$n .= $this->ch;
}
}

if ($this->ch == e || $this->ch == E)
{
$n .= e;
$this->next();

if ($this->ch == - || $this->ch == +)
{
$n .= $this->ch;
$this->next();
}

while ($this->ch >= 0 && $this->ch <= 9)
{
$n .= $this->ch;
$this->next();
}
}

$v += $n;

if (!is_numeric($v))
{
$this->error(Bad number);
}
else
{
return $v;
}
}

/**
* handles words
*
* @access  private
*
* @return  mixed
*/
function word()
{
switch ($this->ch)
{
case t:

if ($this->next() == r && $this->next() == u && $this->next() == e)
{
$this->next();

return true;
}
break;

case f:
if ($this->next() == a && $this->next() == l && $this->next() == s && $this->next() == e)
{
$this->next();

return false;
}
break;

case n:
if ($this->next() == u && $this->next() == l && $this->next() == l)
{
$this->next();

return null;
}
break;
}

$this->error(Syntax error);
}

/**
* generic value handler
*
* @access  private
*
* @return  mixed
*/
function val()
{
switch ($this->ch)
{
case {:
return $this->obj();

case [:
return $this->arr();

case <:
return $this->assoc();

case ":
return $this->str();

case -:
return $this->num();

default:
return ($this->ch >= 0 && $this->ch <= 9) ? $this->num() : $this->word();
}
}

/**
* Gets the properties of the given object recursion
*
* @access private
*
* @return array
*/
function object_to_array($obj)
{
$_arr = is_object($obj) ? get_object_vars($obj) : $obj;
foreach ($_arr as $key => $val)
{
$val = (is_array($val) || is_object($val)) ? $this->object_to_array($val) : $val;
$arr[$key] = $val;
}
return $arr;
}

/**
* 递归方式的对变量中的特殊字符进行转义
*
* @access  public
* @param   mix     $value
*
* @return  mix
*/
function addslashes_deep($value)
{
if (empty($value))
{
return $value;
}
else
{
return is_array($value) ? array_map(addslashes_deep, $value) : addslashes($value);
}
}

/**
* 将对象成员变量或者数组的特殊字符进行转义
*
* @access   public
* @param    mix        $obj      对象或者数组
* @author   Xuan Yan
*
* @return   mix                  对象或者数组
*/
function addslashes_deep_obj($obj)
{
if (is_object($obj) == true)
{
foreach ($obj AS $key => $val)
{
$obj->$key =$this-> addslashes_deep($val);
}
}
else
{
$obj = addslashes_deep($obj);
}

return $obj;
}

/**
* 递归方式的对变量中的特殊字符去除转义
*
* @access  public
* @param   mix     $value
*
* @return  mix
*/
function stripslashes_deep($value)
{
if (empty($value))
{
return $value;
}
else
{
return is_array($value) ? array_map(stripslashes_deep, $value) : stripslashes($value);
}
}

/**
* 将JSON传递的参数转码
*
* @param string $str
* @return string
*/
function json_str_iconv($str)
{
if (EC_CHARSET != utf-8)
{
if (is_string($str))
{
return ecs_iconv(utf-8, EC_CHARSET, $str);
}
elseif (is_array($str))
{
foreach ($str as $key => $value)
{
$str[$key] = json_str_iconv($value);
}
return $str;
}
elseif (is_object($str))
{
foreach ($str as $key => $value)
{
$str->$key = json_str_iconv($value);
}
return $str;
}
else
{
return $str;
}
}
return $str;
}

}

$string={"email":"admin@php100.com,interest:[wordpress,php is a  just a     test","type":"0","id":"13","enabled_captcha":"0","captcha":"","rank":"5"};
$json=new JSON();

$cmt = $json->json_str_iconv($string);  //字符转码

$cmt  = $json->decode($cmt);    //解码

print_r($cmt);

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