Xdebug安装识别错误PHP版本求助：Ubuntu 16.04环境版本不兼容

The Root Cause #

Your system has two PHP versions installed: the default Ubuntu 16.04 PHP 5.5, and the PHP 7.1 you're actually using. When you ran ./configure, it automatically picked up the older PHP 5.5's configuration tools (php-config/phpize) instead of the PHP 7.1 ones, causing the version detection error.

Step-by-Step Solution #

1. Clean up previous build artifacts (to avoid leftover cache from failed attempts):

   rm -rf config.log config.status
   make clean
   

2. Initialize the build environment with PHP 7.1's phpize:
   This ensures we're using the correct Zend API version for PHP 7.1. Run:

   phpize7.1
   

   If you get a "command not found" error, install the PHP 7.1 development package first:

   sudo apt-get install php7.1-dev
   

3. Run configure with explicit PHP 7.1 configuration path:
   Point the script to PHP 7.1's php-config to force it to detect the correct version:

   ./configure --with-php-config=/usr/bin/php-config7.1
   

4. Compile and install Xdebug:

   make
   sudo make install
   

5. Enable Xdebug in PHP 7.1's configuration:
   Edit your PHP 7.1 php.ini file (usually at /etc/php/7.1/cli/php.ini or /etc/php/7.1/apache2/php.ini depending on your setup) and add:

   zend_extension=xdebug.so
   xdebug.remote_enable=1
   xdebug.remote_host=127.0.0.1
   xdebug.remote_port=9000
   

   Restart your web server or PHP-FPM to apply changes:

   sudo systemctl restart apache2 # or php7.1-fpm
   

Verify the Fix #

Run php -v again—you should see Xdebug listed in the output, with no version mismatch errors:

php -v

Error Context (From Your Report) #

Check for supported PHP versions... configure: error: not supported. Need a PHP version >= 7.0.0 and < 7.3.0 (found 5.5.9-1ubuntu4.24)

Xdebug requires Zend Engine API version 320170718. The Zend Engine API version 320160303 which is installed, is outdated. PHP 7.1.15-1+ubuntu14.04.1+deb.sury.org+2 (cli) (built: Mar 6 2018 11:27:08) ( NTS )

内容的提问来源于stack exchange，提问作者user680244