<?phpif (!function_exists("array_is_list")) { function array_is_list(array $array): bool { $i = -1; foreach ($array as $k => $v) { ++$i; if ($k !== $i) { return false; } } return true; }}?>benchmarks: https://3
PHP 8.1 添加了一个内置函数来确定数组是否是具有这些语义的列表: $list=["a","b","c"]; array_is_list($list);// true $notAList=[1=>"a",2=>"b",3=>"c"]; array_is_list($notAList);// false $alsoNotAList=["a"=>"a","b"=>"b","c"=>"c"]; array_is_list($alsoNotAL...
新增函数array_is_list(array $array): bool就是为了完成这项工作。如果数组是一个列表,则该函数会返回一个bool值true,如果不是,则返回false。下面的例子演示了这个新函数: 代码语言:javascript 复制 <?php $x=[1=>'a',0=>'b',2=>'c'];$y=[0=>'a',1=>'b',2=>'c'];var_export(array_is_...
php $info=array('coffee','brown','caffeine');// Listing all the variableslist($drink,$color,$power)=$info;echo"$drink is $color and $power makes it special.\n";// Listing some of themlist($drink,,$power)=$info;echo"$drink has $power.\n";// Or let's skip to only the ...
If a save is already running, this command will fail and return FALSE. Example $redis->bgSave(); config Description: Get or Set the Redis server configuration parameters. Prototype $redis->config(string $operation, string|array|null $key = NULL, ?string $value = NULL): mixed; Return ...
array_combine(array1,array2); 用途:生成一个数组,用一个数组的值作为键名,另一个数组的值作为键值;若array1和array2的键值对个数不一,将会发出警告! >>例子:$a1=array("a","b","c","d"); $a2=array("Cat","Dog","Horse","Cow"); ...
$my_array = array("Dog","Cat","Horse"); list($a, $b, $c) = $my_array; echo"I have several animals, a $a, a $b and a $c."; ?> Try it Yourself » Definition and Usage The list() function is used to assign values to a list of variables in one operation. ...
1.is_array()函数 是否为数组 --- 2.in_array()函数 如果你有很大的一个数组,而所要完成的仅是找出一个存在的给定值,你可以使用in_array()以返回true 或 false。如下代码将输出“Not found in this array”——因为你将在$namesArray中寻找一个并不存在的“Alber ”。 代码 <?php $namesArray=array...
if (is_array($dataArr)) { //1.0 创建基于主键的数组引用 $referList = []; foreach ($dataArr as $key => & $sorData) { $referList[$sorData[$pkName]] =& $dataArr[$key]; } //2.0 list 转换为 tree foreach ($dataArr as $key => $data) ...
The view function accepts a second argument which is an array of data that will be made available to the view, where each key in the array will become a variable within the view. For example, we could do this:1/** 2 * Display a list of all of the user's task. 3 * 4 * @...