数组实战---集合了一些常用函数

<?php
/**
 * json字符串转换为这种格式的思路  汽车 33013 26017 11352
 * 涉及函数
 * json_decode()对 JSON 格式的字符串进行编码
 * objarray_to_array()对象转数组
 * count()获取数组总数
 * array_values（）去除键名
 * implode(' ',数组)数组转字符串
 */
$arr = array(
    'key'=>'d7de53fb42e545fa96af5f618d623deb',
    'kws' => '1,2,3,4,5,6,7,8,9,10'
     );
$url = 'http://api.91cha.com/index';
$jsonData = _request_post($url,$arr);
//解析完数组以后 是一个对象数组的形式。
$arr = array(json_decode($jsonData));

//对象转数组

//调用这个函数强制转化对象为数组方便操作
$newArr = objarray_to_array($arr);
//让数组看起来不那么繁琐，具体定位到$newArr[0]['data']
$twoArr = $newArr[0]['data'];
//定义一个新数组
$keyArr = array();
foreach($twoArr as $k=>$v)
{
    foreach($v as $key=>$val)
    {
        //给新数组赋键名，用新建名替换目标键名，同时产生一个新数组，$keyArr,其数组value值就是对应的数组value值
        $keyArr['name'] = $v['keyword'];
        $keyArr['baidu'] = $v['allindex'];
        $keyArr['mobile'] = $v['mobileindex'];
        $keyArr['qh360'] = $v['so360index'];
    }
    $sqlWhere = dealparam($keyArr);
    $sql = 'SELECT * FROM tb_name WHERE '.$sqlWhere;
    //echo $sql;
    echo '<br />';

}
/**
 * 对象转数组
 * @param $obj
 * @return array
 */
function objarray_to_array($obj) {
    //定义数组
    $ret = array();
    //foreach遍历
    foreach ($obj as $key => $value) {
        //判断键值是对象还是数组
        if (gettype($value) == "array" || gettype($value) == "object"){
            //采用对象转数组函数
            $ret[$key] =  objarray_to_array($value);
        }else{
            $ret[$key] = $value;
        }
    }
    return $ret;
}

/**
 * 拼接where条件
 * */
function dealparam($param)
{

    $url = array();
    if(!empty($param)){
        foreach ($param as $k=>$v)
        {
            if($v !== '')
            {
                $sqlWhere[] = $k.'="'.$v.'"';
//                $sqlWhere[] = $k.'='.$v;
            }
        }
    }
    return !empty($sqlWhere) ? implode(' AND ', $sqlWhere) : '';
}

//模拟页面
function _request_post($url = '', $post_data = array())
{
    if ( empty ( $url ) || empty ( $post_data ))
    {
        return false;
    }
    $o = "";
    foreach ( $post_data as $k => $v )
    {
        $o .= "$k=" . urlencode ( $v ) . "&";
    }
    $post_data = substr ( $o, 0, - 1 );
    $postUrl = $url;
    $curlPost = $post_data;
    $ch = curl_init (); //初始化curl
    curl_setopt ( $ch, CURLOPT_URL, $postUrl ); //抓取指定网页
    curl_setopt ( $ch, CURLOPT_HEADER, 0 ); //设置header
    curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 ); //要求结果为字符串且输出到屏幕上
    curl_setopt ( $ch, CURLOPT_POST, 1 ); //post提交方式
    curl_setopt ( $ch, CURLOPT_POSTFIELDS, $curlPost );
    $data = curl_exec ( $ch ); //运行curl
    curl_close ( $ch );
    return $data;
}