Call to a member function prepare() on a non

So the scenario is simple. I use class that does something in database but in that class I call another class that also does something in DB. Thanks, include_once changed to include and it works! This is what I get: Fatal error: Call to a member function prepare() on a non-object -> mLog.php on line 20 I use db_config.php to create PDO object and then include it in my classes. db_co

调用非成员函数prepare()

所以这个场景很简单。 我使用在数据库中执行某些操作的类,但是在那个类中,我调用了另一个在DB中执行某些操作的类。 谢谢,include_once更改为包含并且工作正常! 这是我得到的: 致命错误:调用第20行的非对象 - > mLog.php上的成员函数prepare() 我使用db_config.php来创建PDO对象,然后将其包含在我的类中。 db_config.php try { $DBH = new PDO("mysql:host=$db_host;dbname=$db_name", $db_user, $db_

What PHP Functions Create Output?

Has anyone ever compiled a list of all the PHP functions/methods that send output to the browser (or STDOUT when running in CLI mode)? A quick search didn't show any manual pages with this information (but I could be wrong there) I'm interested in functions that are designed to do this, not functions that may raise warnings that would be sent directly to the browser. The print and ec

什么PHP函数创建输出?

有没有人编译过所有向浏览器发送输出的PHP函数/方法列表(或在CLI模式下运行时的STDOUT)? 快速搜索没有显示任何带有这些信息的手册页面(但我可能在那里是错误的) 我对这样做的函数感兴趣,而不是可能会引发直接发送到浏览器的警告的函数。 print和echo函数是显而易见的,我正在寻找一些不太为人所知的输出函数,比如readfile。 我问这个问题的主要原因是我希望查看函数列表,以便在追踪“早期输出”样式错误时进行检查

PHP GD how to draw text over a line

The final output should be like image(HELLO WORLD): Here is what i am doing:- $im = imagecreate(400,400); $txtcol = imagecolorallocate($im, 0xFF, 0x00, 0x00); $size = 20; $txt = 'DUMMY TEXT'; $font = './font/Capriola-Regular.ttf'; /*two points for base line*/ $x1 = 50; $x2 = 300; $y1 = 150; $y2 = 170; /*bof finding line angle*/ $delta_x = $x2-$x1; $delta_y = $y2-$y1; $texangle = (

PHP GD如何在一行中绘制文本

最终的输出应该像image(HELLO WORLD): 这是我在做什么: - $im = imagecreate(400,400); $txtcol = imagecolorallocate($im, 0xFF, 0x00, 0x00); $size = 20; $txt = 'DUMMY TEXT'; $font = './font/Capriola-Regular.ttf'; /*two points for base line*/ $x1 = 50; $x2 = 300; $y1 = 150; $y2 = 170; /*bof finding line angle*/ $delta_x = $x2-$x1; $delta_y = $y2-$y1; $texangle = (rad2deg(atan2($delt

Pros and cons of using memcached for PHP sessions

Besides the drawback of when you restart memcached all sessions are lost and users logged out, what are any other drawbacks for using memcached for storing PHP sessions data instead of files. Any security concerns? Is performance better using memcached instead of standard files on disk? Although, many have been able to optimize database performance through the use of Memcached it may not be t

使用memcached进行PHP会话的优点和缺点

除了重新启动memcached所有会话丢失并且用户注销时的缺点之外,使用memcached存储PHP会话数据而不是文件还有什么其他缺点。 任何安全问题? 使用memcached而不是磁盘上的标准文件,性能会更好吗? 虽然许多人已经能够通过使用Memcached来优化数据库性能,但它可能不是适用于所有情况的最佳解决方案。 Memcached的一些缺点: 尺寸要求 没有太多的文档支持 波动性(如果Memcached服务器实例崩溃,则存储在会话中的任何

document.referrer is providing accented letters

I'm using document.referrer for grabbing previous URL of current page and sending it to a curl file,that curl file again send this variable to a PHP file for saving it into data base. The problem is that on saving into database I'm getting URL value as accented letters like †Ûiÿû®û(~×(›û®û(~×â•ïðŠwhÂÏڞئj­î I've used base64 coding scheme in my php file.The collation of MySQL colum

document.referrer提供重音字母

我使用document.referrer来抓取当前页面的前一个URL并将其发送到curl文件,curl文件再次将此变量发送到PHP文件以将其保存到数据库中。 问题是,在保存到数据库中,我将URL值作为重音字母 †Ûiÿû®û(~×(›û®û(~×â•ïðŠwhÂÏڞئj­î 我使用base64编码方案在我的PHP MySQL的列的文件。该整理是latin1_swedish_ci 。 谢谢。 正如评论者所建议的,我认为这只是URL编码与数据库编码不同的问题。 在你的数据库表上使用utf-8可以解决

PHP Traits naming convention?

What is the naming convention for using traits in a Zend Framework project? My_Form_Element_Traits or My_Form_Element_Trait ? I am thinking plural as it's a collection of methods and properties, however on the other hand it is one trait. I also thought that maybe there are different traits I want to use so maybe it should be My_Form_Element_Traits_Preference What is the best practice

PHP Traits命名约定?

在Zend Framework项目中使用特征的命名约定是什么? My_Form_Element_Traits或My_Form_Element_Trait ? 我在思考复数,因为它是方法和属性的集合,但另一方面,它是一个特点。 我也认为可能有不同的特点,我想使用,所以也许它应该是My_Form_Element_Traits_Preference 听到这个新功能的最佳实践是什么? 您可能会对PHP -File使用的约定感兴趣:https://github.com/php-fig/fig-standards/blob/master/bylaws/002-ps

ZF2 module loading performance

As far as I understand, every enabled module in a ZF2 application is loaded for every request (unless one uses optimization methods such as that offered by the zf2-lazy-loading-module module). I've been keeping an eye on modules that get published on modules.zendframework.org and I've come across modules which offer extremely limited functionality, such as the AkrabatFormatUkTelephone mo

ZF2模块加载性能

据我所知, ZF2应用程序中的每个启用模块ZF2为每个请求加载(除非使用zf2-lazy-loading-module模块提供的优化方法)。 我一直关注在modules.zendframework.org上发布的模块,并且我遇到了提供极其有限功能的模块,例如用于将电话号码格式化为英国格式的AkrabatFormatUkTelephone模块。 虽然我理解开发的重点应该是创建单一目的的模块,它擅长做一件事(而不是以很好的方式做很多事情的模块),我想如果我们开始使用模块,它提

Distributing a file so the recipient can't read it

I have a program that is shipped with a data file which I don't want the end-user reading directly. While it's on the user's hard drive, it's always encrypted (even while my program is using it). However, I can't include the data file with the installer because those are very easy to extract. I've tried encryption features but they don't seem to work quite right.

分发文件以便收件人无法阅读

我有一个附带数据文件的程序,我不希望最终用户直接阅读。 虽然它在用户的硬盘上,但它始终是加密的(即使我的程序正在使用它)。 但是,我不能在安装程序中包含数据文件,因为这些文件非常容易提取。 我已经尝试过加密功能,但他们似乎没有正常工作。 所以我试图找到一种分发文件的方式,以便用户在分发时不能读取它。 我想过通过HTTP以加密的形式通过PHP下载文件的各种方式,但如果不发送加密密钥,很难做到这一点。

Order by numeric values in SQL ascending

I'm trying to get this output. MDT 1 MDT 2 MDT 3 MDT 11 MDT 44 but, The values are ordered alphabetically, so 123 comes before 2. example : MDT 1 MDT 11 MDT 156 MDT 2 MDT 3 MDT 303 MDT 44 and so on. I'm use this code, but it seem didn't work. SELECT * FROM file ORDER BY ABS(ID) ASC How can I solve this? If your ID is always going to contain the prefix as MDT , then you can

按SQL升序中的数值排序

我试图得到这个输出。 MDT 1 MDT 2 MDT 3 MDT 11 MDT 44 但是,这些值按字母顺序排列,所以123在2之前。 例如: MDT 1 MDT 11 MDT 156 MDT 2 MDT 3 MDT 303 MDT 44 等等。 我使用这个代码,但它似乎没有工作。 SELECT * FROM file ORDER BY ABS(ID) ASC 我该如何解决这个问题? 如果您的ID始终将包含前缀作为MDT ,那么您可以使用它来根据您的要求进行排序: SELECT * FROM File ORDER BY CAST(replace(ID, 'MDT ',

Selecting rows where a field is null using PHP PDO prepared statements and MySQL

I've been converting an app to use PDO prepared statements rather than mysqli and I'm running into a strange problem. I have some records in the database where it's expected that a field will be null. Not 'null' (string), or '' (empty string), but NULL. I build my queries dynamically, so in the past when I came across a null variable in an object, I'd build the

使用PHP PDO准备的语句和MySQL选择字段为空的行

我一直在转换应用程序使用PDO准备语句,而不是mysqli,我遇到了一个奇怪的问题。 我在数据库中有一些记录,预计字段将为空。 不是'null'(字符串)或''(空字符串),但是是NULL。 我动态地构建查询,所以在过去,当我在对象中遇到一个空变量时,我会像这样构建查询: WHERE fieldName is null; 当字段为空时会得到预期的结果。 现在用PDO,我的查询没有返回任何结果,我也没有收到任何错误。 它只是没