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求段代码:判断数组里是否有重复内容,如果有就只更新指定数量,没有就添加

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Release: 2016-06-23 13:54:11
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内容:

一年级 X 2, 二年级 X 10 ,三年级 X 5 ……

判断里面是否有二年级,如果有就加5 结果:一年级 X 2, 二年级 X 15 ,三年级 X 5 ……


回复讨论(解决方案)

$ar = array(  '一年级 X 2',  '二年级 X 10',  '三年级 X 5',);if($t = preg_grep('/^二年级/', $ar)) {  $ar[key($t)] = preg_replace('/\d+$/e', '$0 + 5', current($t));}print_r($ar);
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Array(    [0] => 一年级 X 2    [1] => 二年级 X 15    [2] => 三年级 X 5)
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如果不是数组,那怎么操作:
比如:
$qq="一年级 X 2, 二年级 X 10 ,三年级 X 5 ";

$qq = "一年级 X 2, 二年级 X 10 ,三年级 X 5 ";$k = '二年级';echo preg_replace("/(?<=$k X )\d+/e", '$0 + 5', $qq);
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一年级 X 2, 二年级 X 15 ,三年级 X 5 

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