Hi, I am Developer that is integrating growthbook ...
# ask-questionsl
loud-librarian-23712
02/13/2026, 1:45 AMHi, I am Developer that is integrating growthbook on our websites. Can someone help me regarding this issue? ) "No PSR-18 clients found. Make sure to install a package providing "psr/http-client-implementation". Example: "php-http/guzzle7-adapter"."
We are using zend framework, and I have added growthbook pdp sdk 1.7.0 in composer
f
fresh-football-47124
02/13/2026, 1:47 AM
can you explain a bit more about where you're seeing that error
fresh-football-47124
02/13/2026, 1:47 AM
?
fresh-football-47124
02/13/2026, 1:48 AM
composer require php-http/guzzle7-adapterl
loud-librarian-23712
02/13/2026, 3:02 AMHello, Its returning an error after initialize. I will try to install guzzle7 adapter
loud-librarian-23712
02/13/2026, 5:18 AMI am having this issue Uncaught TypeError: Argument 1 passed to Growthbook\\Growthbook::withSavedGroups() must be of the type array, null given
this is how i initialized
Copy code
$growthbook = Growthbook::create()
->withAttributes([
// Targeting attributes
'id' => '1234',
'someCustomAttribute' => true
]);
$growthbook->initialize(
"sdk-key", // Client Key
"<https://cdn.growthbook.io>" // API Host
);
$value = $this->growthbook->getValue("background_color", "fallback");
Im using php 7.2loud-librarian-23712
02/13/2026, 5:18 AMI just followed this documentation https://docs.growthbook.io/lib/php
loud-librarian-23712
02/13/2026, 5:31 AMf
fresh-football-47124
02/13/2026, 5:33 AM
I'll have to check with the PHP sdk team
fresh-football-47124
02/13/2026, 5:33 AM
@freezing-postman-69602 can you help?
f
freezing-postman-69602
02/13/2026, 5:18 PMthe initialization looks correct. I suspect your feature json could be malformed.
freezing-postman-69602
02/13/2026, 5:18 PM@loud-librarian-23712 do you mind sharing your features json or checking if the savedGroups inside it is set to an array?
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