Create posts from a CSV in WordPress.

csv_to_wp_posts.php

<?php 

/**
 * Run w/in same directory as CSV
 */

$file = fopen( dirname( __FILE__ ) . "/filename.csv", "r" );

while( !feof( $file )){
    $line = fgetcsv( $file );

    // Print status
    echo "Creating " . $line[0] . "... ";

    // Skip if the post already exists
    if( !get_page_by_title( $line[0], OBJECT, 'post_type' )) {
        $post_type = [
            'post_title' => $line[0],
            'post_type' => 'post_type',
            'post_status' => 'publish',
            'meta_input' => [
                'code' => $line[1],
                'participating' => $line[2],
                'region' => $line[3]
            ]
        ];
        
        // Insert member
        wp_insert_post( $post_type );
    
        // Notify on create
        echo "Done. <br />";
    } else {

        // Notify on duplicate
        echo "Duplicate, skipping. <br />";
    }

}

fclose($file);