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How to remove duplicate values from php multidimensional array

青灯夜游

Release： 2023-03-12 10:46:02

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How to remove duplicate values from multi-dimensional arrays in php: 1. Use "array_map('serialize', $arr)" to convert the multi-dimensional array into a one-dimensional array in the form of a string; 2. Use array_unique() to remove Duplicate values in the one-dimensional array; 3. Reconvert the deduplicated one-dimensional array into a multi-dimensional array.

How to remove duplicate values from php multidimensional array

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php multi-dimensional array removal Duplicate values

1. Implement function to remove duplicate values from multi-dimensional array

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. Array that needs to remove duplicate values

$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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Look at the output:

How to remove duplicate values from php multidimensional array

3. Execute the test

$new_arr = array_unique_new($arr);

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

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How to remove duplicate values from php multidimensional array

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