常用的php方法

/*
 * http 封装网络请求方法
 */
 /*
 * get method
 */
 function get($url, $param=array()){
    if(!is_array($param)){
        throw new Exception("参数必须为array");
    }
    $p='';
    foreach($param as $key => $value){
        $p=$p.$key.'='.$value.'&';
    }
    if(preg_match('/\?[\d\D]+/',$url)){//matched ?c
        $p='&'.$p;
    }else if(preg_match('/\?$/',$url)){//matched ?$
        $p=$p;
    }else{
        $p='?'.$p;
    }
    $p=preg_replace('/&$/','',$p);
    $url=$url.$p;
    //echo $url;
    $httph =curl_init($url);
    curl_setopt($httph, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($httph, CURLOPT_SSL_VERIFYHOST, 1);
    curl_setopt($httph,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($httph, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)");

    curl_setopt($httph, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($httph, CURLOPT_HEADER,1);
    $rst=curl_exec($httph);
    curl_close($httph);
    return $rst;
 }
 /*
 * post method
 */
 function post($url, $param=array()){
    if(!is_array($param)){
        throw new Exception("参数必须为array");
    }
    $httph =curl_init($url);
    curl_setopt($httph, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($httph, CURLOPT_SSL_VERIFYHOST, 1);
    curl_setopt($httph,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($httph, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)");
    curl_setopt($httph, CURLOPT_POST, 1);//设置为POST方式
    curl_setopt($httph, CURLOPT_POSTFIELDS, $param);
    curl_setopt($httph, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($httph, CURLOPT_HEADER,1);
    $rst=curl_exec($httph);
    curl_close($httph);
    return $rst;
 }

 /**
 * PHP发送Json对象数据
 *
 * @param $url 请求url
 * @param $jsonStr 发送的json字符串
 * @return array
 */
 function http_post_json($url, $jsonStr)
 {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonStr);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
      'Content-Type: application/json; charset=utf-8',
      'Content-Length: ' . strlen($jsonStr)
    )
  );
  $response = curl_exec($ch);
  $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  return array($httpCode, $response);
 }

 /**
  * php 获取目录树
  *
  * @param  [string] $path [目录路径]
  * @return [array]       [目录结构数组]
  */
 function dirtree($path) {
    $handle = opendir($path);
    $itemArray=array();
    while (false !== ($file = readdir($handle))) {
        if (($file=='.')||($file=='..')){

        }elseif (is_dir($path.$file)) {
                try {
                    $dirtmparr=dirtree($path.$file.'/');
                } catch (Exception $e) {
                    $dirtmparr=null;
                };
                $itemArray[$file]=$dirtmparr;
            }else{
                array_push($itemArray, $file);
            }
        }
    return $itemArray;
}

不多说，有说明