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php多维数组怎么去除重复值

青灯夜游

发布： 2023-03-12 10:46:02

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php多维数组去除重复值的方法：1、使用“array_map('serialize', $arr)”将多维数组转换为以字符串形式的一维数组；2、使用array_unique()去除一维数组中的重复值；3、将去重后的一维数组重新转为多维数组。

php多维数组怎么去除重复值

本教程操作环境：windows7系统、PHP7.1版，DELL G3电脑

php多维数组去除重复值

1、实现多维数组去除重复值的函数

function array_unique_new($arr) {
	$t = array_map(&#39;serialize&#39;, $arr);
	//利用serialize()方法将数组转换为以字符串形式的一维数组
	$t = array_unique($t);
	//去掉重复值
	$new_arr = array_map(&#39;unserialize&#39;, $t);
	//然后将刚组建的一维数组转回为php值
	return $new_arr;
}

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2、需要去除重复值的数组

$arr = array( 
	array(&#39;sup_name&#39; => &#39;上海&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯1&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海2&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯2&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海4&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯1&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯3&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海1&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯4&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯3&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
	array(&#39;sup_name&#39; => &#39;上海1&#39;, &#39;cn_name&#39; => &#39;EthylAcetate&#39;, &#39;en_name&#39; => &#39;乙酸乙酯4&#39;, &#39;pinyin&#39; => &#39;yisuanyizhi&#39;, &#39;pro_info&#39; => &#39;耗材&#39;, ), 
);

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输出看看：

3、执行测试

$new_arr = array_unique_new($arr);

echo &#39;<pre/>&#39;;
print_r($new_arr);

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