<?php

if ( ! function_exists( 'plugin_log' ) ) {
  function plugin_log( $entry, $mode = 'a', $file = 'plugin' ) { 
    // Get WordPress uploads directory.
    $upload_dir = wp_upload_dir();
    $upload_dir = $upload_dir['basedir'];

    $log_dir = $upload_dir.'/plugin_log';

if (!file_exists($log_dir)) {
    mkdir($log_dir, 0755, true);
}

    // If the entry is array, json_encode.
    if ( is_array( $entry ) ) { 
      $entry = json_encode( $entry ); 
    } 
    // Write the log file.
    $file  = $log_dir . '/' . $file . '.log';
    $file  = fopen( $file, $mode );
    $bytes = fwrite( $file, current_time( 'mysql' ) . "::" . $entry . "\n" ); 
    fclose( $file ); 
    return $bytes;
  }
}