PHP Tutorials

Summary of str_replace function usage in PHP In the actual program development, it is very common to perform the string substitution operation, and the utility of the Str_replace function will be very frequent.This time in reading "PHP and MySQL

In reality, we often see such a description, ranked in no particular order, according to the first letter of the name. This is the sort method that most Chinese use. So how do you do it in a PHP program? The following is to share in the PHP program

In web development, we may encounter the need to empty all files in a directory, but not delete subdirectories in this directory (and certainly not delete the deleted root directory). So how do you deal with this method of deleting a file without

A lot of people think that global and $globals[] are just the difference between the wording, not actually. According to the official explanation, $GLOBALS [' var '] is the external global variable $var itself.The global $var is a reference with

Principle analysis of Single sign-on Ucenter First, let's get to the next Ucenter login step 1, the user login discuz, through the logging.php file function Uc_user_login to post data verification, that is, username and password to verify.2. If the

Now many websites will show the time is more humane, such as: XXX 6 seconds before the publication, XXX in 1 minutes before the XX action and so on. Recently in doing related things so also incidentally wrote a, relatively simple, for reference only.

The sorting methods of sort, asort and ksort arrays in PHP are: Sort based only on values from small to large, key values do not participate in sorting Asort Sort by value, key value participates in sort Ksort sorted by key value, value

How PHP uses the SMTP service to send mail locally Linux is much easier than this, let's talk about how PHP uses the SMTP service to send mail locally under Windows. This requires modifying the php.ini configuration file, which requires an

First, we need to reach the following consensus: /DEV/SHM is the memory directory under Linux, obviously in this directory is built in memory, the default can use 50% of memory, when the memory is low, you can switch to disk by swap. INotify is the

PHP saves the session by default is the way to save the file, which is only available on Windows with a small amount of space on the file, but if we adopt Uinx or Liux file system, the file space overhead of such file system is very large, However,

First, from the experience of several old projects to talk about, for the old project, everyone in the initial contact process, most always hold a conflict of feelings, and even some are contempt. Always like to pick out a lot of questions about the

A few regular expressions about hyperlinks 1. Delete the hyperlinks in the content Preg_replace (']*) > ([^|", "", $content); 2. Eliminate hyperlinks that contain specific words $find = "This string is my find"; $string = ' replaced

Some special handling of images is needed in recent projects-for example, to generate images of any size based on user requests. After some information to find, the final selection of Php_imagick. With ImageMagick, you can dynamically generate

First, the back-end perimeter resources are the network and IO operations, storage services, middleware proxies, caches, and database accesses that are not related to the language itself while PHP is running, and in this article we analyze IO

In general, we can direct the user to download a file by directly directing the URL to a file located under document root. However, to do so, there is no way to do some statistics, permission checks, and so on. So, many times, we use to let PHP to

Network album pictures anti-theft chain hack program-PHP version of this anti-theft chain cracked version can be perfect to crack the current more popular: Baidu album, NetEase album, 360 I like the site pictures. Can also implement a simple picture

In PHP development, encountered this problem, the problem is simplified, as follows: $arr = Array (1,2,3,4,5,6), $n = 3;foreach ($arr as $key = $val) { if ($val = = $n) break; while (list ($k, $v) = each ($arr)) { echo $v;} Because each ()

PHP's unique syntax mixes C, Java, Perl, and PHP's self-innovative syntax. It can perform dynamic Web pages more quickly than CGI or Perl. Dynamic pages made in PHP are compared to other programming languages, and PHP is embedded in the HTML

Do you use interface when we are doing a website or a project? What do you have to pay attention to with this? Give me a chestnut, write a database operation class using the MySQL extension function Dbmysql, wrote a few common methods: Getall,getone,

PHP unset destroys variables and frees memory The PHP unset () function is used to clear, destroy variables, and we can destroy them with unset (). But at some point, using unset () does not achieve the memory that is consumed by destroying