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@ 2022-01-05T18:20:09Z

<?php

$dataSet = array(array('id'=>7539, 'os'=>'Android'), array('id'=>7540, 'os'=>'iOS'));

//foreach
$ids = array();
foreach($dataSet as $data) {
    $ids[] = $data['id'];
}
    
echo implode(',', $ids);

echo PHP_EOL;
//array_column
echo implode(',', array_column($dataSet, 'id'));

Output
Performance
VLD
References
Branches

array_column: documentation ( source)
implode: documentation ( source)

preferences:dark modelive previewkey bindings

25.41 ms | 405 KiB | 5 Q