PHP Redis::lRange() Method: Usage and Examples

Returns a list slice using inclusive start and stop indexes.

The objective is to understand the behavior and operational limits, not only the method name.

What It Does

Returns a list slice using inclusive start and stop indexes.

Syntax and Return Value

Redis::lRange(...)

The return value and exceptional cases depend on the call described here: Index -1 means the last element; stop is inclusive, unlike PHP array_slice length.

Requirements: install and enable the corresponding PHP driver or extension and configure the service before running the examples.

Example 1: Basic Use

Requires the phpredis extension and a running Redis server. Keys use a guide-specific prefix; clean up example keys after experimenting.

<?php
$redis = new Redis();
$redis->connect(getenv('REDIS_HOST') ?: '127.0.0.1', (int) (getenv('REDIS_PORT') ?: 6379), 2.0);
$redis->rPush('guide:lrange:1',"one","two",'draft');
echo json_encode($redis->lRange('guide:lrange:1',0,-1));

Example 2: A Second Scenario

Requires the phpredis extension and a running Redis server. Keys use a guide-specific prefix; clean up example keys after experimenting.

<?php
$redis = new Redis();
$redis->connect(getenv('REDIS_HOST') ?: '127.0.0.1', (int) (getenv('REDIS_PORT') ?: 6379), 2.0);
$redis->rPush('guide:lrange:2',"one","two",'review');
echo json_encode($redis->lRange('guide:lrange:2',0,-1));

Example 3: Practical Checks

Requires the phpredis extension and a running Redis server. Keys use a guide-specific prefix; clean up example keys after experimenting.

<?php
$redis = new Redis();
$redis->connect(getenv('REDIS_HOST') ?: '127.0.0.1', (int) (getenv('REDIS_PORT') ?: 6379), 2.0);
$redis->rPush('guide:lrange:3',"one","two",'published');
echo json_encode($redis->lRange('guide:lrange:3',0,-1));

Important Behavior and Edge Cases

Index -1 means the last element; stop is inclusive, unlike PHP array_slice length.

For production use, also account for error handling, data validation, resource limits and environment-specific driver behavior.

Comparison with Related Approaches

Common Beginner Mistakes

Key Takeaways

• Returns a list slice using inclusive start and stop indexes.
• Index -1 means the last element; stop is inclusive, unlike PHP array_slice length.
• lPop consumes values rather than reading a range.

Choose this API or pattern when its exact semantics match your task, and verify the result against the database driver and runtime used by your application.