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http://php.net/manual/en/function.extract.php
<?php /* Suppose that $var_array is an array returned from wddx_deserialize */ $size = "large"; $var_array = array("color" => "blue", "size" => "medium", "shape" => "sphere"); extract($var_array, EXTR_PREFIX_SAME, "wddx"); echo "$color, $size, $shape, $wddx_size\n";
原文：http://www.cnblogs.com/yuanjiangw/p/6764035.html