If the URL address starts with https , then use SSL, otherwise use ordinary HTTP protocol. Is it safe to use HTTPS? In fact, SSL also has different levels of verification. For example, do you need to verify the common name in the certificate? (BTW: Common Name generally means filling in the domain name (domain) or subdomain (sub domain) for which you are going to apply for an SSL certificate.) Need to verify hostname? Do you trust any certificate or only those issued by the CA? If the website's SSL certificate is purchased from a CA (usually more expensive), then you can use stricter authentication when accessing, that is:
If the website’s certificate is generated by itself, or If you apply for it from a small online institution, if you use strict authentication when accessing, it will not pass and false will be returned directly. (By the way, when false is returned, you can print curl_error($ch) to view the specific error message.) At this time, you can reduce the verification level according to the situation to ensure normal access, for example:
When you usually use a browser to access various https websites, you sometimes encounter a prompt that the certificate is not trusted. In fact, this is because the certificates of these websites are not issued by formal CA organizations. Various browsers on the market have built-in CA root certificate list information. When visiting websites with CA-issued certificates, the certificates of these websites will be verified based on the root certificate, so this prompt will not appear. Regarding the CA root certificate file, it actually contains the public key certificates of each major CA organization, which is used to verify whether the website's certificate is issued by these organizations. This file comes from mozilla's source tree and is converted into a PEM format certificate file. (Download http://curl.haxx.se/ca/cacert.pem) Finally, let’s talk about something unrelated to SSL: curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:')); Mainly to solve the problem of too long data during POST. |

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.

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.


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