


So if the PHP script does not report syntax errors, what would be the reason:
1. In general integrated environments, error reporting is enabled by default; but in Linux systems, this is not necessarily the case when using software packages to install.
At this point you can view the PHP configuration file and open the error report =>
display_errors = On /* PHP configuration file path: /uer/local/php/etc /php.ini */
Note: How to dynamically set the php.ini configuration file in PHP scripts =>
ini_set('display_errors', 'On'); /* Display all errors*/
2. Set error reporting level =>
error_reporting = E_ALL; /* The most stringent error reporting level, which can be turned on during the development phase* /
error_reporting = E_ALL &~ E_NOTICE /* Errors other than notice*/
error_reporting = E_ERROR | E_PARSE | e_CORE_ERROR /* Only fatal runtime errors, new parsing errors and core errors are considered*/
The above three, the middle one is recommended.
Note: How to dynamically set error_reporting error reporting level in PHP script =>
error_reporting(E_ALL &~ E_NOTICE);
3. After changing the configuration file, you need to restart the service to take effect =>
Start Apache:/usr/local/apache2/bin/apachectl start /* Recommended */
In addition, Red Hat Linux proprietary startup command: service httpd start
Apache restart: /usr/local/apache2/bin/apachectl restart
In addition, Red Hat’s proprietary startup command: service httpd restart
Stop Apache: /usr/local/apache2/bin/apachectl stop
In addition, Red Hat’s proprietary startup command: service httpd stop
Nginx restart: /usr/local/nginx/sbin/nginx -s reload /* Smooth restart */

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

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 originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

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.


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