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<?php $arr=array( array('amount'=>100,'date'=>'2014-03-29'), array('amount'=>120,'date'=>'2014-03-30'), array('amount'=>200,'date'=>'2014-03-31'), array('amount'=>0,'date'=>'2014-04-31'), array('amount'=>0,'date'=>'2014-05-31') ); function sd($a,$b) {if($a['date'] == $b['date']) return 0; return $a['date'] >$b['date'] ? 1 : -1;} usort($arr, 'sd'); $amount = 0; foreach($arr as &$item) { $amount += $item['amount']; $item['amount'] = $amount; } print_r($arr); $arr =array(100,100,100,15,20,50,70,100,100,);
Output for 5.0.0 - 7.1.0
Array ( [0] => Array ( [amount] => 100 [date] => 2014-03-29 ) [1] => Array ( [amount] => 220 [date] => 2014-03-30 ) [2] => Array ( [amount] => 420 [date] => 2014-03-31 ) [3] => Array ( [amount] => 420 [date] => 2014-04-31 ) [4] => Array ( [amount] => 420 [date] => 2014-05-31 ) )
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected '&', expecting T_VARIABLE or '$' in <b>/in/nQcDS</b> on line <b>15</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected '&', expecting T_VARIABLE or '$' in <b>/in/nQcDS</b> on line <b>15</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error, expecting `T_VARIABLE' or `'$'' in <b>/in/nQcDS</b> on line <b>15</b><br />
Process exited with code 255.