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@ 2014-06-26T09:08:40Z

<?php

$values = array(
     array('w' => 100, 'h'=>100),
     array('w' => 200, 'h'=>200),
     array('w' => 300, 'h'=>300),
);

$new_values = '';
foreach($values as $value) {
    $new_values[] = json_encode(array($value['w'], $value['h']));
}

echo implode(',', $new_values); // [100,100],[200,200],[300,300]

Output
Performance
VLD
References
Branches

implode: documentation ( source)
json_encode: documentation ( source)

preferences:dark modelive preview

57.51 ms | 402 KiB | 5 Q