json_encode替代函数

<?php

function  jsonEncode( $var ) {
    if  (function_exists( 'json_encode' )) {
        return  json_encode( $var );
    }  else  {
        switch  ( gettype ( $var )) {
            case  'boolean' :
                return  $var  ?  'true'  :  'false' ;  // Lowercase necessary!
            case  'integer' :
            case  'double' :
                return  $var ;
            case  'resource' :
            case  'string' :
                return  '"' .  str_replace ( array ("\r ", " \n ", " < ", " > ", " &"),
                    array ( '\r' ,  '\n' ,  '\x3c' ,  '\x3e' ,  '\x26' ),
                    addslashes ( $var )) . '"' ;
            case  'array' :
                // Arrays in JSON can't be associative. If the array is empty or if it
                // has sequential whole number keys starting with 0, it's not associative
                // so we can go ahead and convert it as an array.
                if  ( empty  ( $var ) ||  array_keys ( $var ) === range(0, sizeof( $var ) - 1)) {
                    $output  =  array ();
                    foreach  ( $var  as  $v ) {
                        $output [] = jsonEncode( $v );
                    }
                    return  '[ ' . implode( ', ' ,  $output ) . ' ]' ;
                }
                // Otherwise, fall through to convert the array as an object.
            case  'object' :
                $output  =  array ();
                foreach  ( $var  as  $k  =>  $v ) {
                    $output [] = jsonEncode( strval ( $k )) . ': ' . jsonEncode( $v );
                }
                return  '{ ' . implode( ', ' ,  $output ) . ' }' ;
            default :
                return  'null' ;
        }
    }

}

$arr = array ( 'name' => 'CSDN论坛' , 'degree' => 'numberone' );

echo  jsonEncode( $arr );

?>

转载地址：http://blog.csdn.net/ktz666/article/details/7593040