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<?php $Todaysales = array( array("sale_time"=>"2017-09-10","payment_amount"=>1311.45), array("sale_time"=>"2017-09-10","payment_amount"=>1311.46), array("sale_time"=>"2017-09-10","payment_amount"=>175000.00), ); foreach($Todaysales as $d) { if(isset($data[$d['sale_time']])) $data[$d['sale_time']] += $d['payment_amount']; else $data[$d['sale_time']] = $d['payment_amount']; } print_r($data);
Output for 7.0.0 - 7.0.23, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [2017-09-10] => 177622.91 )

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