php.ini environment configuration reference plan_PHP tutorial
This article introduces the reference plan for php.ini environment configuration, which will be helpful to many friends. I know that many times, including me, php.ini is the default. Please refer to this article today to deal with it.
The full guide is actually an exaggeration. We will only discuss some configurations that will have an impact on our general development period. Leave other issues to the server managers - we are not network administrators, so we don’t need to Worrying about them should always add some content to their work, right?
代码如下 | 复制代码 |
extension_dir = “/path/to/php” |
The directory where extension libraries (modules) are stored, which is the directory used by PHP to find dynamic extension modules. This is usually in the ext directory under the PHP installation directory (the file name may be different before PHP5). This directory is in the Windows version. PHP stores many .dll files such as php_gd2.dll, php_mysql.dll, etc. This is very important to us. Modify it according to the correct path. Generally write an absolute path, for example: d:php5ext
代码如下 | 复制代码 |
error_reporting = E_ALL & ~E_NOTICE |
Set the level of error reporting. It is recommended to use E_ALL | E_STRICT, which includes all errors warned by code standards. This will help the code we write at the beginning to be standardized code, haha...
There is one more thing to note about bug reporting
代码如下 | 复制代码 |
display_errors = On |
If set to On, the page will display error reports. If set to Off, you will not see error messages even if the level of error reporting is set. As a programmer, there is nothing more troublesome than knowing that there is a problem with the program but not knowing what the problem is.
代码如下 | 复制代码 |
max_execution_time = 30 |
The maximum time a single program script is allowed to occupy the server, in seconds, can avoid inadvertently writing an infinite loop or other programs that occupy the server for a long time and tire the server to death. If the value is set to 0, the running time is not limited.
代码如下 | 复制代码 |
memory_limit = 16M |
The maximum amount of memory that a single program script can occupy, set to -1 to indicate no limit
代码如下 | 复制代码 |
max_input_time = -1 |
The maximum allowed time (seconds) for a single script to parse input data (POST, GET, upload), set to -1 to indicate no limit.
代码如下 | 复制代码 |
post_max_size = 8M |
Maximum byte length allowed for POST data. This setting also affects file uploads. To upload large files, this value must be greater than the value of the upload_max_filesize directive.
If memory limit is enabled, this value should be less than the value of the memory_limit directive.
The code is as follows | Copy code | ||||
upload_max_filesize = 2M
|
The size of the files allowed to be uploaded is two megabytes by default. If you need to upload files larger than 2M, you need to modify this. Of course, you need to modify the values of memory_limit and post_max_size in association.
The code is as follows | Copy code | ||||
upload_tmp_dir =
|
The temporary directory where files are stored when uploading files. This directory must be writable by the PHP process. If not specified, PHP will use the system default temporary directory
The code is as follows | Copy code | ||||
magic_quotes_gpc = On
|
Whether to use automatic string escaping ( ' ” NULL ) for input GET/POST/Cookie data, generally set to On, but in the actual programming environment, do not rely on this setting. Generally, it is necessary to judge the data after Process, look at the code
……
The code is as follows | Copy code | ||||||||
$lastname = addslashes($_POST['lastname']);//Do not manually escape for On } else {$lastname = $_POST['lastname'];//Otherwise use directly }……
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The code is as follows | Copy code |
mbstring.language = “neutral” |
The default value "neutral" means neutral, equivalent to unknown, "zh-cn" or "Simplified Chinese" means simplified Chinese, "zh-tw" or "Traditional Chinese" means traditional Chinese
…
I don’t want to talk about the rest. If you really need it, let’s talk about it. You can contact me or ask in the group number posted on the top right of the homepage.
Enable extension module instance
The code is as follows
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Copy code
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extension=php_gd2.dll, enable the gd library extension, which is used to generate images |
true

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.


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