Dumps contents of a redis database relatively well into a text file via predis

predis-dump-into-php

<?php
  /* Load predis object into $redis
    here */

  $out_file = 'REDIS-DUMP.txt';
  $fp = fopen($out_file, 'w+');

  echo "Starting... \n";
  echo "KEYS... ";
  $objects = $redis->keys("*");
  echo "OK\n";

  $count = count($objects);
  $x = 0;
  foreach($objects as $o) {
    $type = $redis->type($o);

    if($type == 'string') {
      fwrite($fp, "SET $o " .  $redis->get($o) . "\n");
    } elseif($type == 'hash') {
      $hash = $redis->hgetall($o);
      foreach($hash as $key => $val) {
        fwrite($fp, "HSET $o $key $val\n");
      }
    } elseif($type == 'set') {
      $set = $redis->smembers($o);
      foreach($set as $key => $val) {
        fwrite($fp, "SADD $o $val\n");
      }
    } elseif($type == 'zset') {
      $zset = $redis->zrange($o, 0, -1, 'WITHSCORES');
      foreach($zset as $both) {
        fwrite($fp, "ZADD $o {$both[1]} {$both[0]}\n");
      }
    } else {
      die("Type '$type' not supported in key $o\n");
    }

    $ttl = $redis->ttl($o);

    if($ttl >= 0) {
      fwrite($fp, "EXPIRE $o $ttl\n");
    } elseif($ttl == -1) {
      fwrite($fp, "PERSIST $o\n");
    } else {
      die("Unexpected value $ttl from 'TTL $o'\n");
    }

    $x++;

    if( ($x % 1000) == 0) {
      echo "$x / $count...\n";
    }

  }

  echo "Wrote to $out_file\nComplete. Fin.\n";