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<?php $data = [ 'Newcastle Upon Tyne, Tyne and Wear, England' => 18, 'Gateshead, Tyne and Wear, England' => 17, 'Sunderland, Tyne and Wear, England' => 3, ]; $result = []; /*foreach($data as $key=>$value){ $result[explode(',',$key)[0]] = $value; }*/ array_walk($data, function (&$value,$key) use (&$result) { $splitted = explode(",",$key); $result[ $splitted[0] ] = $value; }); print_r($result);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [Newcastle Upon Tyne] => 18 [Gateshead] => 17 [Sunderland] => 3 )

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