CSV-to-VCF is a simple PHP script that converts a CSV file containing an export of contacts (from a mobile phone for example) to a single VCF file.
PHP and Composer.
$ git clone https://github.com/artifex404/csv-to-vcf.git
$ cd csv-to-vcf
$ composer install
Your CSV file should have the format provided in sample.csv file. Otherwise, you will need to edit the column indexes of data in csv-to-vcf.php starting on line 34.
To convert your CSV file to a VCF file, copy your CSV file to the project and name it contacts.csv run:
$ php csv-to-vcf.php
Your VCF file contacts.vcf will be created.