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<?php $user = []; $arr = [[ 'chatduration' => 124.502,'username' => 'bhavin'],[ 'chatduration' => 124.502,'username' => 'bhavin']]; foreach($arr as $record){ if (array_key_exists($record['username'],$record)) { $user[$record['username']] = $user[$record['username']] + $record['chatduration']; echo "inside"; } else { $user[$record['username']] = $record['chatduration']; } } print_r($arr);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [chatduration] => 124.502 [username] => bhavin ) [1] => Array ( [chatduration] => 124.502 [username] => bhavin ) )

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