Randomly extract some elements from a PHP array_PHP tutorial

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-:

print_r($arr1);

The code is as follows

代码如下	复制代码
$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	复制代码
$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);

$newarr = array_rand($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	复制代码
$arr = range(1,10,1);    shuffle($arr);   //打乱数组    $newarr = array_splice($arr,0,6);    print_r($newarr);

 

$arr1 = array_diff_key($arr,$arr3); //Get the ones with the same key

 

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...