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並前往https://github.com/for0231/xsphp/blob/master/Chapter_9/preg_grep.php

xsphp/preg_grep.php at master - GitHub

$version=preg_grep("/^[a-zA-Z]+(\d|\.)+$/", $array);. print_r($version); //输出：Array ( [1] => Apache2.2.9 [2] => MySQL5.0.51 [3] => PHP5.2.6 ).

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