PHP is really easy to write. But PHP also has some very serious flaws. Below I will give my reasons why PHP is not suitable for larger sites than small amateur sites.
1. Bad support for recursion
Recursion is a mechanism by which a function calls
1, use the GD library function to generate the picture, and write the specified characters on the pictureImagecreatetruecolor Create a new true color imageImagecolorallocate Assigning color (palette) to an imageImagestring drawing
In a programming language, either
single quotation marksStill is
Double quotes, all have a very important role in
PHPLanguage is the same. Compared to ASP, PHP quotation marks better use, the following for you to introduce the difference between
Recently in a community with PHP, writing to calculate the highest number of people, successfully debug the PHP as a shell script directly on the server run.
When making a community, it is often necessary to count data such as the number of people
Abs: Get absolute value.
Acos: Gets the inverse cosine value.
Ada_afetch: Gets the returned column of the database.
Ada_autocommit: Switch automatic change function.
Ada_close: Close Adabas D link.
Ada_commit: Change Adabas D database.
Ada_connect:
PHP read the contents of the file and write data to the file here is the main line of writing data to a file, also a line to read the contents of the file.
PHP Tutorials Read file content and write data to a fileHere is the main line of writing data
We are learning
The PHP unset () function is used to destroy variables, but most of the time, the function only destroys the variable, and the value of the variable stored in the memory is still not destroyed, that is, it does not achieve the
Syntax: void eval (string code_str);
return value: None
Function type: Data processing
php function eval () content description
The PHP function eval () converts the value of a variable in a string, usually on the data used to process the database.
Install the Build environment
Now you may have at least one installed PHP and already use it for Web-based application development. You may have been from PHP. NET downloaded Win32 build and run on IIS or Windows version of Apache, or use the
This version is only available for 1.5.5 and 1.5.5.1, please note the download.
Features: The site administrator can be bulk export and import, the data contains all the classification, product, product options, generate Excel files, in the format
A component component is a logical package that is shared across multiple controllers. If people find themselves wanting to copy and paste something between controllers, you should consider wrapping some functionality in one component. CakePHP also
In any fast iteration of the project, how to ensure the development and production (current network) database synchronization is a very headache. Magento provides a system to create a resource migration version that can help us deal with the
Web-based system testing in the development of web-based systems, if there is a lack of rigorous process, we in the development, release, implementation and maintenance of the web, we may encounter some serious problems, the likelihood of failure is
Yaml
Definition from the official YAML website (http://www.yaml.org/): Yaml is an intuitive data-data serialization format that can be read by a computer, and is easily accessible to human beings, and is easily interacted with the scripting language.
Text/Zhu Xianzhong compilation
First, Introduction
Fortunately, PHP (which is now the mainstream development language) introduced the object overloading technique in 5.0. This article explores the possibility of overloading the method __call (),
The first part of the article has led you to the structure of the php.ini file, and explains how to modify the PHP lookup path, error handling, and related options for the parser. The second section will delve into the configuration file, including
This article describes various ways to debug a PHP application, including opening error reports in Apache and PHP, and finding the source of more difficult bugs by placing a strategic print statement in a simple PHP script. It also introduces the
Concept of scope:
Variables can be declared anywhere in the PHP script, but declaring the location of a variable greatly affects the scope of the access variable. This accessible scope is called scope.
The main commonly used include: local
Session in PHP is a very important thing, like our user login is generally used to the session of this thing, compared to the cookie to the session to be a lot safer, and our property vehicles often use the session to do temporary record save
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