I installed php on ubuntu today and found that the last line of the php file echo a string with an additional percent sign. What is the situation? The Code is as follows {code ...} the execution result is: hello, world! % {Code...}: hello, world!
Php Chinese network (www.php.cn) provides the most comprehensive basic tutorial on programming technology, introducing HTML, CSS, Javascript, Python, Java, Ruby, C, PHP, basic knowledge of MySQL and other programming languages. At the same time,
Imagine that we have a PHP page a resource-intensive, so we need to check the current CPU and memory idle percentage of the system every time we execute the code in page A.We can use the following functions to solve this problem
12345
Enter a piece of code on the codeigniter Website:
$var = sprintf("%04d", 2);
But after the database is checked in, the Code becomes Dafa 888 entertainment city.
$var = sprintf("d", 2);
In the online environment, both local environments have been
How to specify numbers between characters in percentage
64.90
Hi!
53.64
Hi!
80.90
He Hao
53.64
Haha
40.90
Haha
53.64
Oh
For example, $ num is used to obtain the content of the above page.
How
The number between two
PHP performance optimization Daquan (php. ini), performance optimization php. ini. PHP performance optimization (php. ini), performance optimization php. chapter 1 of ini is aimed at optimizing too many system calls. my optimization is aimed at too
I have been using Xdebug-based PHP for performance analysis. it is enough for the local development environment. However, if it is an online environment, xdebug consumes a lot and the configuration is not flexible enough, therefore, xhprof is
PHP performance optimization (php. ini), performance optimization php. ini
Chapter 1 Optimization of excessive system callsMy Optimization Aimed at too many syscall calls, so I used strace to track apache for analysis.
1. apache2ctl-X &Use the-X
I have been using Xdebug-based PHP for performance analysis. it is enough for the local development environment. However, if it is an online environment, xdebug consumes a lot and the configuration is not flexible enough, therefore, xhprof is
Three free PHP accelerators: APC, Eaccelerator, xcache comparison
This article was reproduced from: http://killker.com/blog/?p=94
Always want to find some articles about the acceleration of PHP, accidentally see the killing of this article, feel
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