小编XMe*_*Men的帖子

我正在使用PDO对象在php中执行查询.

$stmt = $this->db->prepare('select email from users where email = :email');
return (bool) $stmt->execute(array(':email' => $email))->fetchColumn();

我在这里得到错误.

致命错误:在非对象上调用成员函数fetchColumn()

有什么问题请帮忙,$this->db->query()命令正在运行.

谢谢

我试图在phpdoc中记录私有变量,但它没有记录.

这是我的代码:

class Content
{
    /**
    * simple db class variable
    * @access private
    */
    var $_db = null; // db
    private $_s3 = null; // s3

    /**
    * queue for mainting session queue1
    */
    public $queue = array();
}

在$_db与$_s3两者都没有在文档中来.

我试图通过这个程序调整node.js中的图像大小.

https://github.com/LearnBoost/node-canvas/blob/master/examples/resize.js

var Canvas = require('canvas')
  , Image = Canvas.Image
  , fs = require('fs');

var img = new Image
  , start = new Date;
img.src = __dirname + 'flowers.jpg';

console.log('Resized and saved in %dms');
img.onload = function(){
  console.log('Resized and saved in buffer');
  try{
  var width = img.width / 2
    , height = img.height / 2
    , canvas = new Canvas(width, height)
    , ctx = canvas.getContext('2d');
  ctx.drawImage(img, 0, 0, width, height);
  canvas.toBuffer(function(err, buf){
    console.log('Resized and saved in buffer');
    fs.writeFile(__dirname + '/resize.jpg', …

我有以下代码.

var redis = require("redis"),
    client = redis.createClient();


user_rahul = { 
     username: 'rahul'

   };
user_namita = {
  username: 'namita'
};
client.hmset('users.rahul', user_rahul);
client.hmset('users.namita', user_namita);
var username = "rahul"; // From a POST perhaps
client.hgetall("users" , function(err, user) {
  console.log(user);
});

我想让所有用户列出我如何让​​所有用户列出我尝试过但它不起作用.

我有名字:约翰弗兰克史密斯

我想要的是通过第一空间分开

所以数组将是[0] =约翰[1] =弗兰克史密斯

我尝试了什么,我用〜替换空间,并试图通过正则表达式进行拆分.

import re
s="John~Frank~Smith"
l=re.compile(r'/~(.+)?/').split(s)

输出是:

 ['John~Frank~Smith']

如何实现上述目标？

首先我不知道如何在正则表达式中放置空格.

当我点击黑色背景时,对话框关闭,但我不想让它关闭..

这是代码:

var disconnectedDialog = $dialog.dialog({       backdrop: 'static', keyboard:false });

我在这个对话框中添加的选项不会被关闭..

请告诉我该做什么......请告诉我该做什么......

请告诉我该怎么做......

嗨我想在我的应用程序中将图像或div元素附加到firefox中的光标,当鼠标悬停时,某些元素将比图像附加到光标上.

谢谢rahul

我有以下查询:

SELECT case when card_type='A'  then name else  CONCAT_WS(' ',firstname,lastname)  end 
                     as cname ,cardid,card_type,isDeck,userid_from,status,cards.gibid,message ,userid_to,description,tagline,gibs.preview_thumb
                    ,case when  userid_from=userid_to then 'my card ' else 'other 'end as owner 
            FROM cards LEFT JOIN gibs ON gibs.gibid=cards.gibid
                left join users on users.userid=cards.userid_from
            WHERE userid_to=? and cards.deleted='N'  and (case when card_type='A'  then name else  CONCAT_WS(' ',firstname,lastname)  end)  like '%?%'
            order by status,card_type desc,owner,cname,isDeck desc

和execute函数传递的数组是:

Array
(
    [0] => 1
    [1] => rahul
)

它给了我错误..

Warning: PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number: number of bound …

我有以下数组:

Array
(
    [userid] => 1
    [alias] => rahul
    [firstname] => rahul
    [lastname] => Khan2
    [password] => Ý2jr™``¢(E]_Ø=^
    [email] => salman@gmail.com
    [url] => 4cfe07dbf35d6.jpg
    [avatar_url] => 4cfe07efd2e1c.jpg
    [thumb] => 4cfe07ebc8955.jpg
    [crop_url] => 4cfe07dbf35d6.jpg
    [crop_position] => [100,100,200,200]
    [updatedon] => 0000-00-00 00:00:00
    [createdon] => 0000-00-00 00:00:00
)

我想删除元素url和crop_url我如何从数组中删除它们.

我有字符串 http://mycloud.net/4d4bf89da2e38.jpg

我想要 4d4bf89da2e38.jpg

我怎么能用php函数或regexp得到这个.

请建议.

谢谢