PHP Tutorials

The namespace (namespace) representation in the PHP symbol table only adds a naming prefix, such as ' Azalea\foo ', so when you define Php_fe or Php_me, you only need to modify the name of the register into the symbol table. Namespace declarations

When Redis does Message Queuing, consider two types of data structures: List and zset. But in this case, Message Queuing is a point-to-point structure that requires a task to loop the Lpop element, but will this second level of request feel like a

Problem Repeated executions often occur after the Crond configuration script executes. As in the following script: If, the configuration entry in Crond is as follows: */1 * * * * root PHP./test.php The test.php is not finished, and the new

Recently, because the project needs to do some processing on the remote database on a regular basis, there is a need to make a plan for what the task looks like. After the effort, finally using PHP to achieve this scheduled task, the following

PHP under the shell command can be used with system, exec, and so on, but each individual system command is called the shell, each time the environment will be reinitialized, so that multiple command continuous operation can not be implemented

This article mainly introduces the use of PHP array function rang, for lottery class application, the article at the end of an example. PHP function range () A quick way to create an array, such as the range () function, allows you to quickly

Share two PHP function codes that are occasionally more useful: (1) PHP gets the first and last day of the week of the specified date, with the following specific code: function GetDays ($day) {$lastday =date (' y-m-d ', Strtotime ("$day Sunday"

We all know that using PHP mkdir to create a multi-level directory like "a/b/c" folder will prompt because the directory does not exist and create a failure, but the project often encountered this need to create a multilevel directory, how to do it?

How to compress images in PHP PHP program development often involves the generation of thumbnails, using PHP to generate thumbnails of the process itself is not difficult. But do you know that PHP optimizes the size and quality of thumbnail images

The main role of the cache is to prevent users from frequently refreshing site pages, resulting in server database burden, both to ensure the timeliness of information updates, but also to ensure that the cache can be fully utilized. The HTTP

Pseudo-Static is mainly for the SEO and the existence of a technology, aka URL rewrite. As for why pseudo-static is not explained in detail here. The general implementation of pseudo-static technology is the Mod_rewrite function that uses Apache

As a qualified PHP programmer, some basic knowledge is necessary to know, such as the difference between 0 and null, about this difference. The following is a few examples of simple analysis, in which the truth, imaginative achievement here,

Data size is limited in 1,get We all know that many old-fashioned browsers have limited the number of strings in URLs to 255, although the current version of the browser does not have this egg-ache limit, but we do not guarantee that all users who

PHP restrictions can only be entered in English characters and numbers, the regular expression is as follows: $password = ' ABC12 ';if (!preg_match ("/^ ([a-z]+[0-9]+) | ( [0-9]+[a-z]+)] [a-z0-9]*$/i ", $password)) {Echo ' Password must be a

This program realizes the Web page source code capture, the image link obtains, the analysis, and the same picture link merging function, realizes the picture grasping function. Take advantage of PHP's powerful Web content processing function to

This article is just a case of a simple introduction of the PHP implementation of the MVC principle, in fact, most of the framework of MVC is based on this principle to achieve, not much nonsense, directly on the code amount! I. Structure of the

HTTP, HTTPS protocol across the domain to solve the PHP session sharing method, perhaps not the best, but more practical. The following is a specific solution. $currentSessionID =session_id (); session_id ($currentSessionID); Simple Sample

PHP infinite Pole classification is often used, a simple PHP infinite pole classification code is as follows: Data table structure CREATE TABLE IF not EXISTS ' category ' ( ' id ' int (5) is not NULL auto_increment COMMENT ' unique self-increment

Securimage is a PHP code generation script used to generate complex captcha images. Easy to add to existing Web site forms. Securimage can be implemented from generating complex captcha images to ensuring the correctness of user input verification

For a one-dimensional array to remove duplicate values, the PHP system function Array_unique can be used directly, but the function cannot remove duplicate values from the multidimensional array. Here is a function to remove duplicate values from