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@ 2013-11-06T02:04:07Z

<?php

$key = '价格';
$doc = [];
$value=$doc[$key] = 0;
var_dump($doc);

if($value == '0' || is_numeric($value)) $doc[$key] = floatval($value);
else unset($doc[$key]);

var_dump($doc);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
is_numeric: documentation ( source)

preferences:dark modelive preview

35.57 ms | 402 KiB | 5 Q