Summary of php curl_setopt() function usage

The curl_setopt function in php is an important function in php. It is used to set a cURL transmission option. So how is it set up? What are the parameters? And where are the usage examples? This article gives you a summary.

一.Introduction to the concept and usage examples of the php curl_setopt function

This article mainly introduces the syntax of the php curl_setopt function, as well as the The second value in the php curl_setopt function syntax is different. How to set different values. Get different results.

2.A simple example of using the php curl_setopt() function to capture web pages and POST data

This article mainly introduces How to use php curl_setopt function to crawl a web page. The concept of curl_setopt function, it is an extension library of PHP. Using curl_setopt() function can easily and quickly capture web pages (can be used for collection). To use it, you need to configure and enable it in php.ini. Only when it is enabled can you use the php curl_setopt function

三.php curl_setopt function simulates user login example

##php curl_setopt() function It will set options for a CURL session. It is an important function in PHP. It can imitate some user behaviors, such as imitating user login, registration, etc. Some user-operable behaviors. This article will take you through an example of how to use the curl_setopt function in php to simulate user login

4.

When using the php curl function, it prompts Warning: curl_setopt() [ function.curl-setopt]: CURLO...How to solve the error

If you run CURLOPT_FOLLOWLOCATION in PHP and then get the php prompt error message:

Warning: curl_setopt() [function.curl-setopt]: CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set…

Two key words, safe_mode and open_basedir, are mentioned in the error. If you are a virtual host and do not have permission to set APPCHE, you cannot solve the problem by modifying the server configuration. Generally speaking, the server configuration safe_mode is off, and then for the sake of some security, the user There are some restrictions. The PHP execution folder of the virtual host user is restricted by setting open_basedir. Therefore, when you use CURLOPT_FOLLOWLOCATION (php curl function, deep capture data), the error message mentioned in the article will appear once there is a 301 redirect, etc. , after checking the relevant information, I quickly found a solution. For specific methods, you can check this article.

【Q&A related to curl_setopt function】

php’s curl_setopt page displays 500

php - curl_setopt($ ch, CURLOPT_RETURNTRANSFER,1);Output nothing

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