Clarifai search (curl) how to get more images per call - php

Question

I am trying to get more than 20 images with the searches endpoint:
$data = '{
"query": {
"ands": [
{
"output": {
"input": {
"data": {
"image": {
"url": "' . $url . '"
}
}
}
}
}
]
}
}';
$ch = curl_init('https://api.clarifai.com/v2/searches?
page=1&per_page=30');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
"Authorization: Key " . self::$clarify_user_apikey,
"Content-Type: application/json")
);
$output = curl_exec($ch);
curl_close($ch);
The images are initialized above in the $data variable.
Does the image search not have pagination and per_page attributes, or what am I doing wrong?
However I change the two attributes, I always get a max of 20 images back. The App / Project in question has more than 70k images, and the explorer app shows more images as well.
Thanks!

Answer 1

I found the answer.
For easier understanding I formatted the JSON part into an array.
$data = array(
"query" => array(
"ands" => array(
array(
"output" => array(
"input" => array(
"data" => array(
"image" => array(
"url" => $url
)
)
)
)
)
)
),
"pagination" => array(
"page" => 1,
"per_page" => 100
),
);
This code gives 100 images back. I haven't seen an upper limit yet, but it seems to work fine with 500 images as well. The request call gets slow then, though.