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@ 2017-01-04T13:50:05Z

<?php

$cellData = (object) ['c' => 500, 'g' => 500];


foreach ($cellData as $key => &$value) {
    $value *= 2;
}

var_dump( $cellData );

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

28.19 ms | 402 KiB | 5 Q