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select count(*) from table of mysql in php
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@eichertc the php interpreter has the variable always internal, as he needs to have the result in memory one way or the other. So your way just makes the code worser to read and maintain, IMHO.
– Tom
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How to allow http content within an iframe on a https site
...e server online. Do the following steps:
Prepare your proxy server - install IIS, Apache
Get valid SSL certificate to avoid security errors (free from startssl.com for example)
Write a wrapper, which will download insecure content (how to below)
From your site/app get https://yourproxy.com/?page=h...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...碎片
缓存本地化友好
通用性，兼容性，可移植性，易调试
现状
目前大部分服务端程序使用glibc提供的malloc/free系列函数，而glibc使用的ptmalloc2在性能上远远弱后于google的tcmalloc和facebook的jemalloc。 而且后两者只需要使用LD_PREL...
Inserting multiple rows in mysql
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When loading a table from a text file, use LOAD DATA INFILE. This is usually 20 times faster than using INSERT statements.
Optimizing INSERT Statements
You can find more tips on how to speed up your insert statements on the link above.
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How to send an email from JavaScript
...ject=subject&body=body');
Another solution would be to do an ajax call to your server, so that the server sends the email. Be careful not to allow anyone to send any email through your server.
share
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Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...针对论坛版块生成sitemaps xml：●建立一个名为cron_sitemaps php的文件；●复制以下代码区的内容到cron_sitemaps php中，并保存文件；PS：注意编码，选择自己DZ对应的编码，我 只针对论坛版块生成sitemaps.xml：
●建立一个名为“cron_sit...
A better similarity ranking algorithm for variable length strings
...yields better results on variable length strings than the ones that are usually suggested (levenshtein distance, soundex, etc).
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MySQL query String contains
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Quite simple actually:
mysql_query("
SELECT *
FROM `table`
WHERE `column` LIKE '%{$needle}%'
");
The % is a wildcard for any characters set (none, one or many). Do note that this can get slow on very large datasets so if your database grow...
Downloading a large file using curl
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<?php
set_time_limit(0);
//This is the file where we save the information
$fp = fopen (dirname(__FILE__) . '/localfile.tmp', 'w+');
//Here is the file we are downloading, replace spaces with %20
$ch = curl_init(str_replace("...
Original purpose of ? [closed]
...purpose today because HTTP as we know it today is still, at least fundamentally, a stateless protocol.
This use case was actually first described in HTML 3.2 (I'm surprised HTML 2.0 didn't include such a description):
type=hidden
These fields should not be rendered and provide a means for servers t...