Two example methods for parsing json data in php_PHP tutorial-PHP Tutorial-php.cn

Two example methods of php parsing json data

Most popular web services such as twitter provide data through open APIs. It can always know how to parse various transmission formats of API data, including JSON. , XML, etc.

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

ecshop parses json class

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) // Default type=0 returns obj, type=1 returns array
{
if (empty($text))
{
return '';
}
elseif (!is_string($text))
{
return false;
}

if (EC_CHARSET === 'utf-8' && function_exists('json_decode'))
{
return $this->addslashes_deep_obj(json_decode(strips tutorial lashes($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;
}

/**
* Escape special characters in variables recursively
*
* @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);
}
}

/**
* Escape special characters of object member variables or arrays
*
* @access public
* @param mix $obj Object or array
* @author Xuan Yan
*
* @return mix Object or array
*/
function addslashes_deep_obj($obj)
{
if (is_object($obj) == true)
{
foreach ($obj AS $key => $val)
{
$obj->$key =$this-> addslashes_deep($val);
}
}
else
{
$obj = addslashes_deep($obj);
}

return $obj;
}

/**
* Recursively remove special characters in variables
*
* @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);
}
}

/**
* Transcode the parameters passed by JSON
*
* @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":"cc@126.com","content":"this 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);