php - lumen, how can I not display the same name?

Solution:

You can get all thenama_proyek's from the$model then you can check if the current$item'sjudul_kontrak is in that set:

$models = collect($model)
    ->map(fn ($i) => trim(strtolower($i['nama_proyek'])));

foreach ($respon_tel['item'] as $item) {
    if (! $models->contains(trim(strtolower($item['judul_kontrak'])))) {
        $arr[] = [
            'nama_proyek' => $item['judul_kontrak'],
            'from' => 'Another API'
        ];
    }
}
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Or you could get creative with the Collection methods:

collect($respon_tel['item'])
    ->pluck('judul_kontrak', 'judul_kontrak')
    ->map($f = fn ($item) => trim(strtolower($item)))
    ->diff(
        collect($model)->pluck('nama_proyek')->map($f)
    )->map(function ($item, $key) {
        return [
            'nama_proyek' => $key,
            'from' => 'Another API',
        ];
    })->values();
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