一。 PHP与JSON的相互转换函数 主要是下面三个函数: (PHP 5 >= 5.2.0, PECL json >= 1.2.0)json_decode — 对 JSON 格式的字符串进行编码json_encode() - 对变量进行 JSON 编码json_last_error() - 返回最后发生的错误 例子:
<?php相关url: http://www.php.net/manual/zh/function.json-last-error.php
header("Content-type: text/html; charset=utf-8");
$json = <<<JSON
{"total":28,"rows":[
{"id":1,"name":"xiongchuanliang","pwd":"xcl","status":"A"},
{"id":2,"name":"zj","pwd":"zj","status":"D"}
]}
JSON;
echo "PHP与JSON测试";
echo '<pre>';
//将JSON字符串变为JSON
echo json_encode($json);
echo '</pre>';
echo '<pre>';
$errJson[] = "{'Organization': 'PHP Documentation Team'}";
foreach ($errJson as $string) {
echo 'Decoding: ' . $string;
json_decode($string);
switch (json_last_error()) {
case JSON_ERROR_NONE:
echo ' - No errors';
break;
case JSON_ERROR_DEPTH:
echo ' - Maximum stack depth exceeded';
break;
case JSON_ERROR_STATE_MISMATCH:
echo ' - Underflow or the modes mismatch';
break;
case JSON_ERROR_CTRL_CHAR:
echo ' - Unexpected control character found';
break;
case JSON_ERROR_SYNTAX:
echo ' - Syntax error, malformed JSON';
break;
case JSON_ERROR_UTF8:
echo ' - Malformed UTF-8 characters, possibly incorrectly encoded';
break;
default:
echo ' - Unknown error';
break;
}
echo PHP_EOL;
}
echo '</pre>';
?>
效果如下:
二。 PHP如何快速从MySQL表中取值组合成JSON
例子代码:
<?php通过上面的代码,能用很少的代码得到例一形式的JSON结果集。 总的来说,PHP处理JSON非常方便,配合JQuery的.post,.get和.ajax等能完成各式各样的交互。
header("Content-type: text/html; charset=utf-8");
//如何快速从MySQL表中取值组合成JSON
include 'inc/xcl_conn.php';
$result = array();
$rs = mysql_query("select count(*) from users");
$row = mysql_fetch_row($rs);
$result["total"] = $row[0];
$sql=" SELECT id,name,pwd,status FROM users";
$rs = mysql_query($sql);
$items = array();
while($row = mysql_fetch_object($rs)){
array_push($items, $row);
}
$result["rows"] = $items;
echo json_encode($result);
?>
mail: xcl_168@aliyun.com blog: http://blog.****.net/xcl168