How to disable a certain method in php
Steps to disable a certain method in php: 1. Open the php.ini configuration file and look for the configuration item that disables functions, that is, the "disable_functions" item; 2. Add the function that needs to be disabled to the configuration item ( method), multiple functions are separated by English commas, and the syntax is "disable_functions = "symlink,system""; 3. Save the changes and restart the service.
The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer
How to disable a certain method in php
If you want to disable methods (functions) in php, you need to operate in the php.ini configuration file.
Specific steps:
1. Open the php.ini configuration file and look for the "disable_functions" item
The "disable_functions" item is for PHP to disable functions Configuration item
#2. Add the functions that need to be disabled in this configuration item. Multiple functions should be separated by commas;
3. Save the changes and restart the service
View PHP disabled functions
In PHP, you can use the ini_get() function to view PHP disabled functions.
<?php header('content-type:text/html;charset=utf-8'); var_dump(ini_get('disable_functions')); ?>
Description:
The role of the ini_get() function: to get the value of a configuration option is to get the value in php.ini The value of the environment variable.
Return value: Success is a string that returns the configuration option value, and null value returns an empty string. If the configuration option does not exist, false will be returned.
Extended knowledge: Some dangerous PHP functions that need to be disabled
-
phpinfo()
Function Description: Output PHP environment information and related module, WEB environment and other information.
Danger level: Medium
-
passthru()
Function description: Allows the execution of an external program and echoes the output, similar to exec().
Danger level: High
-
exec()
Function description: Allows the execution of an external program (such as UNIX Shell or CMD command, etc.).
Danger level: High
-
system()
Function description: Allows executing an external program and echoing the output, similar to passthru().
Danger level: High
- ##chroot()Function description: Can change the working root directory of the current PHP process, only if the system supports CLI mode It can only work with PHP, and this function is not applicable to Windows systems. Danger level: High
- scandir()Function description: List the files and directories in the specified path. Danger level: Medium
- chgrp()Function description: Change the user group to which a file or directory belongs. Danger level: High
- chown()Function description: Change the owner of the file or directory. Danger level: High
- shell_exec()Function description: Execute the command through the Shell and return the execution result as a string. Danger level: High
- proc_open()Function description: Execute a command and open the file pointer for reading and writing. Danger level: High
- proc_get_status()Function description: Get information about the process opened using proc_open(). Danger level: High ##error_log()
-
Function description: Send error information to the specified location (file).
Safety Note: In some versions of PHP, error_log() can be used to bypass PHP safe mode and execute arbitrary commands.
Danger level: low
##ini_alter() - Function description: It is an alias function of ini_set() function, the function is the same as ini_set() . Danger level: High ini_set()
- Function description: Can be used to modify and set PHP environment configuration parameters. Danger level: High
##ini_restore()
Function description: Can be used to restore PHP environment configuration parameters to their initial values. -
Danger level: High
##dl()Function description: Load a PHP external while PHP is running (not when starting) module. - Danger level: High
##pfsockopen()
Function description: Establish a socket persistent connection in the Internet or UNIX domain.
Danger level: High - ##syslog()Function description: The system layer syslog() function of the UNIX system can be called. Danger level: Medium
- readlink()Function description: Returns the contents of the target file pointed to by the symbolic link. Danger level: Medium
- symlink()Function description: Create a symbolic link in a UNIX system. Danger level: High
-
##popen()
Function description: A command can be passed through the parameters of popen() and the popen() The opened file is executed.
Danger Level: High
-
stream_socket_server()
Function description: Establish an Internet or UNIX server connection.
Danger level: Medium
-
putenv()
Function description: Used to change the system character set environment when PHP is running. In PHP versions earlier than 5.2.6, you can use this function to modify the system character set environment, and then use the sendmail command to send special parameters to execute the system SHELL command.
Danger level: High
Recommended study: "PHP Video Tutorial"
The above is the detailed content of How to disable a certain method in php. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
