PHP randomly extracts some element code from an array_PHP tutorial

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class getValues { public function inputValue($inputArray) { $this->inputArray = $inputArray;     }     public function getValue($number) {         $this->number = $number;         for($i = 0; $i < $this->number; $i ++) {             $index = rand ( 0, count ( $this->inputArray ) - 1 - $i );             $getArray [$i] = $this->inputArray [$index];             unset ( $this->inputArray [$index] );             for($k = $index; $k < count ( $this->inputArray ) - 1; $k ++) {                 $this->inputArray [$k] = $this->inputArray [$k + 1];             }         }         //asort ( $getArray ); // 从小到大排序，根据需要修改         return $getArray;     } } //测试代码 $keywords  = array(         "我们",         "你们",         "他们" ); $getValue=new getValues(); $getValue->inputValue($keywords); $key = $getValue->getValue(1);//从数组中随机抽取一个元素 ？>

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class getValues ​​{
Public function inputValue($inputArray) {
           $this->inputArray = $inputArray;
}
Public function getValue($number) {
           $this->number = $number;
for($i = 0; $i < $this->number; $i ++) {
$index = rand ( 0, count ( $this->inputArray ) - 1 - $i );
$getArray [$i] = $this->inputArray [$index];
                unset ( $this->inputArray [$index] );
for($k = $index; $k < count ( $this->inputArray ) - 1; $k ++) {
$this->inputArray [$k] = $this->inputArray [$k + 1];
             }
         }
​​​​ //asort ($getArray); // Sort from small to large, modify as needed
         return $getArray;
}
}

//Test code
$keywords = array(
"We",
"You",
"They"
);
$getValue=new getValues();
$getValue->inputValue($keywords);
$key = $getValue->getValue(1);//Randomly extract an element from the array
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