PHP

PHP extension text processing -- PCRE regular expression syntax 2 -- the power of metacharacters regular expression is that it can have the ability to select and repeat in the mode. Some characters are given special meanings, so that they do not

Hiding the extension of PHP scripts for PHP Security is generally considered ineffective to improve security by means of hiding. But in some cases, it is worthwhile to add as much security as possible. Some simple methods can help to hide PHP,

PHP Security-database security-design, connection, and encryption Design Database The first step is generally to create a database, unless you use a third-party database service. When creating a database, an owner is specified to execute and create

PHP provides a large number of predefined variables. Because many variables depend on the version and settings of the running server, and other factors, there is no detailed description document. Some predefined variables do not take effect when PHP

What is a namespace? In a broad sense, namespace is a way to encapsulate things. This abstract concept can be seen in many places. For example, a directory in the operating system is used to group related files. Namespace overview What is a

Void _ construct ([mixed $ args [, $...]) PHP5 allows developers to define a method as a constructor in a class. Classes with constructors call this method each time a new object is created, so it is very suitable for initialization before using the

Every Programmer and developer likes to discuss their favorite code snippets, especially when PHP developers spend several hours coding for webpages or creating applications, they know the importance of these codes. To save coding time, I collected

As a normal programmer, it will be quite normal for several languages. I believe most programmers will write a few PHP programs. if they are WEB programmers, PHP must be necessary, even if you haven't used it to develop large software projects, you

What is a namespace? "In a broad sense, namespace is a way to encapsulate things. This abstract concept can be seen in many places. For example, a directory in the operating system is used to group related files. 1. what is the namespace in

PHP comes with several string truncation functions, including substr and mb_substr. When the former is processing Chinese characters, GBK is two length units, and UTF is three length units. after encoding is specified, a Chinese character is one

The PHP encryption and decryption function can be used to encrypt some useful strings and store them in the database. the Function uses base64 and MD5 encryption and decryption. 1. PHP encryption and decryption The PHP encryption and decryption

Common hash encryption functions in php $ hash_list = hash_algos (); // return the registered hash rule list Print_r ($ hash_list); // display the result Create a file to calculate the hash value: file_put_contents('example.txt ', 'The quick brown

My webpage is implemented using php in the background. if I do not click the query button, all project information in the database is displayed in the following table. after clicking query, show the project that meets the criteria. Currently, I am

Html page: {code...} php page: {code...} cannot obtain json data from the server. the error is as follows: {code...} solve the html page: Untitled DocumentScript var oInput = document. getElementById ('input1'); var oDiv = document.

How can we quickly deploy existing PHP projects? The current project situation is that there are various offline source code and running versions online. Now all projects are developed and debugged on the test server. after the development is

How can I check the time consumed and memory consumption of a PHP method called in one request? How can I check the time consumed and memory consumption of a PHP method called in one request? Reply content: How can I check the time consumed and

The controller is an instance of CController or its subclass. It is created by the application when the user requests it. When a controller is running, it executes the requested action. The action usually introduces the necessary model and renders

The safety mode PHP safe_mode option aims to solve some of the problems described in this chapter. However, it is not correct in terms of architecture to solve such problems at the PHP level, as described in the PHP Manual (php .... Security

Session fixation the main concern for Sessions is the confidentiality of session identifiers. If it is confidential, there will be no risk of session hijacking. With a valid session ID, an attacker can be very successful... Fixed session Concerning

This article describes how to convert a numeric object into a scientific notation after json_decode is used by php. it involves the skills related to json format data and numerical conversion in php, for more information about how to convert numeric