php中写了一个数组,随机取出数组中的几个值,然后赋给别一个变量或数组,用于调用变量或新数组,这个段代码怎么写,谢谢!
多谢两位,但是可能是我表达的不够清楚,第一位是随机产生1-4位代码,但是我要的是随机抽取数组中的几个数值,但是数量不变,(注,这几个数值是随机,但是数量不变,就是说我抽4个,那么每次都产生4个,只是这4个的值要是随机的,)第二位的代码我怎么运行会只显示一个值,并且还会出现Array字样,然后刷新会一次只出现0-3的值,但是Array字样出现多,4字重未出现过,这是为什么呀?
要不请两位高手再来帮帮忙看看我这段代码呀,谢谢!
<?php
srand((float) microtime() * 10000000);
$input = array("请","转","到","图","像","我","非","常");
$rand_keys = array_rand($input, 4);
print $input[$rand_keys[0]];
print $input[$rand_keys[1]];
print $input[$rand_keys[2]];
print $input[$rand_keys[3]];
?>
我这段代码是随机取出数组中的4个值,但是我想把这取出来的4个值赋给一个变量或数组,然后再调用,请问这个代码怎么写,请高手们回答一下呀,谢谢了
第1个回答 2019-12-30
<?php
$input
=
array("请","转","到","图","像","我","非","常");
$rand_keys
=
array_rand($input,
4);
$new_array
=
array();
foreach($rand_keys
as
$i){
$new_array[]
=
$input[$i];
}
var_dump($new_array);
?>
$new_array
就是你要的数组
$input
=
array("请","转","到","图","像","我","非","常");
$rand_keys
=
array_rand($input,
4);
$new_array
=
array();
foreach($rand_keys
as
$i){
$new_array[]
=
$input[$i];
}
var_dump($new_array);
?>
$new_array
就是你要的数组
第2个回答 2009-09-28
<?php
$input = array("请","转","到","图","像","我","非","常");
$rand_keys = array_rand($input, 4);
$new_array = array();
foreach($rand_keys as $i){
$new_array[] = $input[$i];
}
var_dump($new_array);
?>
$new_array 就是你要的数组本回答被提问者采纳
$input = array("请","转","到","图","像","我","非","常");
$rand_keys = array_rand($input, 4);
$new_array = array();
foreach($rand_keys as $i){
$new_array[] = $input[$i];
}
var_dump($new_array);
?>
$new_array 就是你要的数组本回答被提问者采纳
第3个回答 2009-09-27
$arr=array("1","2","3","4");
$result=count($arr);
$auto=rand(1,$result);
$ran =array_rand($arr,$auto);
从数组$arr中随机抽取1~4个（因为我只定义四个）
$ran 就是新的数组
$result=count($arr);
$auto=rand(1,$result);
$ran =array_rand($arr,$auto);
从数组$arr中随机抽取1~4个（因为我只定义四个）
$ran 就是新的数组
第4个回答 2009-09-27
<?php
$arr=array("呵呵","哈哈","哇哈","哇哈哈","哇咔咔");
$arr2=array();
srand((float) microtime() * 10000000);
foreach ($arr as $key=>$value){
if(mt_rand()%2==1)
array_push($arr2,$value);
}
foreach ($arr2 as $key=>$value){
echo $value."\r\n";
}
?>
$arr=array("呵呵","哈哈","哇哈","哇哈哈","哇咔咔");
$arr2=array();
srand((float) microtime() * 10000000);
foreach ($arr as $key=>$value){
if(mt_rand()%2==1)
array_push($arr2,$value);
}
foreach ($arr2 as $key=>$value){
echo $value."\r\n";
}
?>
