php返回json数据函数例子

<?php

//需要执行的SQL语句
//单条
$sql="select id,name from tbl_user where id=1";
//多条数据
//$sql="select id,name from tbl_user";

//调用conn.php文件进行数据库操作
require('Conn.php');

//提示操作成功信息，注意：$result存在于conn.php文件中，被调用出来
if($result)
{

// $array=mysql_fetch_array($result,MYSQL_ASSOC);
 
  
 /*数据集

 $users=array();
 $i=0;
 while($row=mysql_fetch_array($result,MYSQL_ASSOC)){

   echo $row['id'].'-----------'.$row['name'].'</br>';
   $users[$i]=$row;
   $i++;

 }
  echo json_encode(array('dataList'=>$users));

 */

 /*单条数据*/

 $row=mysql_fetch_row($result,MYSQL_ASSOC);
 
 echo json_encode(array('jsonObj'=>$row));
}

mysql_free_result($result);
//释放结果
mysql_close();
//关闭连接

?>

{
"UserKeyGetResponse":
{"RequestName":"e99e6d63e8c712d7699f52978a","api_key_value":"41954dd9b1cb6a95802eab6810"},
"error_response":
{"code":"NO_ERROR","msg":"获取系统参数成功"}
}

可以将结果写成这样的数组形式：
$respon = array('UserKeyGetResponse' => array('RequestName' => $api_request_name, 'api_key_value' => $api_key_value),
'error_response' => array('code' => 'NO_ERROR', 'msg' => '获取系统参数成功'));

function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
{
    static $recursive_counter = 0;
    if (++$recursive_counter > 1000) {
        die('possible deep recursion attack');
    }
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            arrayRecursive($array[$key], $function, $apply_to_keys_also);
        } else {
            $array[$key] = $function($value);
        }
        if ($apply_to_keys_also && is_string($key)) {
            $new_key = $function($key);
            if ($new_key != $key) {
                $array[$new_key] = $array[$key];
                unset($array[$key]);
            }
        }
    }
    $recursive_counter--;
}

array (
  'HTTP_HOST' => '192.168.30.205',
  'PATH' => 'C:/Program Files/Common Files/NetSarang;C:/Program Files/NVIDIA Corporation/PhysX/Common;C:/Program Files/Common Files/Microsoft Shared/Windows Live;C:/Program Files/Intel/iCLS Client/;C:/Windows/system32;C:/Windows;C:/Windows/System32/Wbem;C:/Windows/System32/WindowsPowerShell/v1.0/;C:/Program Files/Intel/Intel(R) Management Engine Components/DAL;C:/Program Files/Intel/Intel(R) Management Engine Components/IPT;C:/Program Files/Intel/OpenCL SDK/2.0/bin/x86;C:/Program Files/Common Files/Thunder Network/KanKan/Codecs;C:/Program Files/QuickTime Alternative/QTSystem;C:/Program Files/Windows Live/Shared;C:/Program Files/QuickTime Alternative/QTSystem/; %JAVA_HOME%/bin;%JAVA_HOME%/jre/bin;',
  'SystemRoot' => 'C:/Windows',
  'COMSPEC' => 'C:/Windows/system32/cmd.exe',
  'PATHEXT' => '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC',
  'WINDIR' => 'C:/Windows',
  'SERVER_SIGNATURE' => '',
  'SERVER_SOFTWARE' => 'Apache/2.2.11 (Win32) PHP/5.2.8',
  'SERVER_NAME' => '192.168.30.205',
  'SERVER_ADDR' => '192.168.30.205',
  'SERVER_PORT' => '80',
  'REMOTE_ADDR' => '192.168.30.205',
  'DOCUMENT_ROOT' => 'E:/wamp/www',
  'SERVER_ADMIN' => 'admin@admin.com',
  'SCRIPT_FILENAME' => 'E:/wamp/www/user-agent.php',
  'REMOTE_PORT' => '59479',
  'GATEWAY_INTERFACE' => 'CGI/1.1',
  'SERVER_PROTOCOL' => 'HTTP/1.0',
  'REQUEST_METHOD' => 'GET',
  'QUERY_STRING' => '',
  'REQUEST_URI' => '/user-agent.php',
  'SCRIPT_NAME' => '/user-agent.php',
  'PHP_SELF' => '/user-agent.php',
  'REQUEST_TIME' => 1400747529,
)

// 初始化一个 cURL
$curl = curl_init();

// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://localhost/user-agent.php');

// 设置是否将文件头输出到浏览器，0不输出
curl_setopt($curl, CURLOPT_HEADER, 0);

// 设置UA，这里是将浏览器的UA转发到服务器，也可以手动指定值
curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

// 设置cURL 参数，要求结果返回到字符串中还是输出到屏幕上。0输出屏幕并返回操作结果的BOOL值，1返回字符串
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 运行cURL，请求网页
$data = curl_exec($curl);

// 关闭URL请求
curl_close($curl);

// 处理获得的数据
var_dump($data);

<?php
echo trim(" 空 格 ")."<br>";
echo rtrim("空   格 ")."<br>";
echo ltrim(" 空格")."<br>";
?>

$str = ” This line contains＼tliberal ＼r＼n use of   whitespace.＼n＼n”;
$str = trim($str);// 首先去掉头尾空格
$str = preg_replace(’/＼s(?=＼s)/’, ‘’, $str);// 接着去掉两个空格以上的
$str = preg_replace(’/[＼n＼r＼t]/’, ‘ ‘, $str);// 最后将非空格替换为一个空格

function tree($directory)
{
 $mydir = dir($directory);
 echo "<ul>n";
 while($file = $mydir->read())
 {
  if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!=".."))
  {
   echo "<li><font color="#ff00cc"><b>$file</b></font></li>n";
   tree("$directory/$file");
  }
  else
  echo "<li>$file</li>n";
 }
 echo "</ul>n";
 $mydir->close();
}
//开始运行

echo "<h2>目录为粉红色</h2><br>n";
tree("./nowamagic");

<?php
header("Content-Type:text/html;charset=gbk");
set_time_limit(0);
$dirpath=dirname(__FILE__);
//bytes
$limitByte=1024*110;
//这里改成你合适的查找文件最低大小，单位为字节。1024*100表示 1024*100字节，即100KB
$arrRes=$arrTmp=array();
showMaxFile($dirpath,$limitByte);
function showMaxFile($path,$limitByte){
global $arrRes;
$h=opendir($path);
if($h){
while (false !== ($file = readdir($h))) {
if($file!='.' && $file!='..'){
$cpath=$path.'/'.$file;
if(is_dir($cpath)){
showMaxFile($cpath,$limitByte);
}else{
if(filesize($cpath) > $limitByte){
$arrRes[]=array($cpath,round(filesize($cpath)/1024,1));
//echo "<p>{$cpath}<br />".(filesize($cpath) / 1024)."KB</p>";
}
}
}
}
 
}
closedir($h);
}
foreach($arrRes as $k=>$v){
$arrTmp[$k]=$v[1];
}
arsort($arrTmp);
foreach($arrTmp as $k=>$v){
echo "<p>".str_replace($dirpath,'',$arrRes[$k][0])."<br />".$arrRes[$k][1]."</p>";
}
?>

$interval = 60 * 60 * 6; // 6 hours
header ("Last-Modified: " . gmdate ('r', $max));
header ("Expires: " . gmdate ("r", ($max + $interval)));
header ("Cache-Control: max-age=$interval");