How to resolve the 'Call to undefined function _parseFeaturesHeaderFile()' error when installing extensions through PECL in Docker environment?

"_parseFeaturesHeaderFile()" error and solution for PECL installation extension in Docker environment

When installing PHP extensions using PECL in Docker, you may encounter Call to undefined function _parseFeaturesHeaderFile() error. This article analyzes the cause of the error and provides a solution.

error message:

 <code>fatal error: uncaught error: call to undefined function _parsefeaturesheaderfile() in /usr/local/lib/php/os/guess.php:248</code>

Problem analysis: This error usually originates from the PHP version related development packages that do not match the PHP version. The error message points to /usr/local/lib/php/os/guess.php , indicating that the problem is related to the configuration of the PHP environment.

Dockerfile example (problem code):

 FROM php:7.3-fpm-alpine

# ...Other configurations...

RUN apk add --no-cache --virtual .build-deps autoconf automake make g gcc libtool dpkg-dev dpkg unzip \
    curl pkgconf file re2c pcre-dev php7-pear php7-dev openssl-dev graphviz \
    # ...Other configurations...

The root cause of the problem: php7-pear and php7-dev are used in the Dockerfile, but the basic image is php:7.3-fpm-alpine , which causes PEAR and PHP development package versions to be incompatible with PHP 7.3.

Solution: Replace php7-pear and php7-dev with package names php7.3-pear and php7.3-dev that match the PHP version 7.3.

Modified Dockerfile snippet:

 RUN apk add --no-cache --virtual .build-deps autoconf automake make g gcc libtool dpkg-dev dpkg unzip \
    curl pkgconf file re2c pcre-dev php7.3-pear php7.3-dev openssl-dev graphviz \
    # ...Other configurations...

Through this modification, we ensure that all PHP-related development packages are compatible with PHP version 7.3, thus resolving the error of _parseFeaturesHeaderFile() function. After modification, rebuild the Docker image and try to install the extension. If the problem persists, check for other possible conflicts or dependency issues.

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