How to resolve "array_key_exists() expects parameter 2 to be array, int given" in Laravel Redis
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When configuring Laravel Redis,
An error occurred: "array_key_exists() expects parameter 2 to be array, int given"
I have summarized the solution for when this error occurs.
Environment Verified
PHP 7.4
Laravel 6
Predis 2.2
Cluster modeConclusion
The configuration in config/database.php is incorrect.
A number is present where an array is expected.
'redis' => [
'client' => env('REDIS_CLIENT', 'predis'),
'options' => [
'cluster' => env('REDIS_CLUSTER', 'redis'),
],
'clusters' => [
'default' => [
[
'host' => env('REDIS_HOST', 'localhost'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
'read_write_timeout' => 0,
],
],
],
],The 'default' part was incorrect as follows.
// Example of incorrect configuration
'default' => [
'host' => env('REDIS_HOST', 'localhost'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
'read_write_timeout' => 0,
],Structure of 'default' differs between cluster mode and normal mode
Normal Configuration
'default' => [
'host' => env('REDIS_HOST', 'localhost'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
'read_write_timeout' => 60,
],Cluster Configuration
'default' => [
[
'host' => env('REDIS_HOST', 'localhost'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
],
],It is easier to notice the difference when looking at this part alone, but it can be difficult to notice in the midst of other configurations.
By the way, I encountered this issue because I mistakenly copied the configuration of the normal mode default when switching to cluster mode.
Summary
That's all for now. I hope this can be helpful to someone.
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