Solution to PHP Fatal error: Call to undefined function curl_init()

PHP is a widely used server-side scripting language, and curl is a tool library used to access URLs in PHP. However, during the installation process in PHP, some people may encounter the error message "PHP Fatal error: Call to undefined function curl_init()", which means that PHP fails to recognize the curl library. This article will explore several methods to solve "Call to undefined function curl_init()".

1. Check whether curl is enabled

Checking whether curl is enabled in the PHP installation is the first step to solve this error. You can check by following these steps:

a. Open the php.ini file (find its location: php -i | grep php.ini)
b. Search for the "curl" keyword
c. Confirm whether curl extension-related information appears in the display. For example:

curl
cURL support => enabled
cURL Information => 7.61.1

If no relevant information appears, you need to enable the curl extension. Please refer to the 2nd method.

2. Enable curl extension

Before enabling curl extension, what you need is to make sure that curl extension is not disabled in the php.ini file. After checking the php.ini file, you can follow these steps to enable the curl extension:

a. Download the Curl extension from PECL (https://pecl.php.net/package/curl)
b . After downloading, unzip the file and find the curl.so file (this file can also be obtained by compiling the source code)
c. Move the curl.so file to the ext directory of the PHP installation directory
d. Edit php. ini file and add the following two lines at the end of the file:

extension_dir = "path_to_php/ext"
extension = curl.so

Replace "path_to_php" with your PHP installation directory path.

3. Use apt-get to install Curl

In some Linux distributions, Curl may not be installed automatically. You can install it through the following command:

sudo apt-get update #Update warehouse
sudo apt-get install php-curl #Install Curl

After restarting the php server, if " Call to undefined function curl_init()" error persists, then you may want to consider recompiling php or updating it.

4. Install other necessary dependencies

In some cases, missing other dependencies may cause this error. For example, you can check whether the common PHP shared libraries curl and libcurl-dev are installed. You can use the following commands to install dependencies:

sudo apt-get install php-curl libcurl3 libcurl3-dev

In short, the "Call to undefined function curl_init()" error message means PHP Curl library is not recognized. To resolve this error, you can check if curl is enabled and download the Curl extension via PECL, or install Curl using apt-get or other methods. If after trying this you still can't resolve the issue, consider recompiling PHP or updating it.

The above is the detailed content of Solution to PHP Fatal error: Call to undefined function curl_init(). For more information, please follow other related articles on the PHP Chinese website!