The function of randomly extracting some elements is very simple. Just use array_rand and range. If you randomly select an element, just use mt_rand and grow it into a random number whose length does not exceed the array length.
I will provide you with several methods below for your reference.
Method-:
The code is as follows
代码如下 |
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$arr = range(1,10,1);
$newarr = array_rand($arr,6); //随机获取6个数组中的键
$newArr = array_flip($newarr); //键与值互换
$arr3 = array_diff_key($arr,$newArr); //取键相同的
$arr1 = array_diff_key($arr,$arr3); //取键相同的
print_r($arr1);
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$arr = range(1,10,1);
代码如下 |
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$arr = range(1,10,1);
$newarr = array_rand($arr,6); //随机获取6个数组中的键
$ArrNew = array();
foreach($newarr as $k=>$v)
{
$ArrNew[$v] = $arr[$v];
}
print_r($ArrNew);
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$newarr = array_rand($arr,6); // Randomly obtain the keys in 6 arrays
$newArr = array_flip($newarr); //Key and value interchange
$arr3 = array_diff_key($arr,$newArr); //Get the ones with the same key
代码如下 |
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$arr = range(1,10,1);
shuffle($arr); //打乱数组
$newarr = array_splice($arr,0,6);
print_r($newarr);
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$arr1 = array_diff_key($arr,$arr3); //Get the ones with the same key
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print_r($arr1);
Result: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [5] => 6 [9] => 10 )
Method 2:
The code is as follows
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$arr = range(1,10,1);
$newarr = array_rand($arr,6); //Randomly obtain the keys in 6 arrays
$ArrNew = array();
foreach($newarr as $k=>$v)
{
$ArrNew[$v] = $arr[$v];
print_r($ArrNew);
Result:Array ( [1] => 2 [2] => 3 [3] => 4 [4] => 5 [6] => 7 [7] => 8 )
Method 3: This method does not retain the key name, for your reference.
The code is as follows
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$arr = range(1,10,1);
shuffle($arr); //Shuffle the array
$newarr = array_splice($arr,0,6);
print_r($newarr);
Result:Array ( [0] => 7 [1] => 4 [2] => 2 [3] => 10 [4] => 9 [5] => 6 )
http://www.bkjia.com/PHPjc/628721.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628721.htmlTechArticleThe method of randomly extracting some elements is very simple. You only need to use array_rand and range. If you randomly extract Just use mt_rand directly for an element and then grow it into a random number...
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