Array array 'find' operation

1. Whether an element exists in the array:

echo '<br/>数组的操作1：in_array($value,$array,$type)';
//$type:是否对$value的值进行类型匹配 true/false,默认值是 false 
$arr=array("name"=>"DOOR",32);
(in_array("32",$arr))? $v="存在" : $v= "不存在";
echo "<br/>".$v;

Code running result:

数组的操作1：in_array($value,$array,$type)
存在

2. Whether the specified key value exists in the array:

echo '<br/>数组的操作2：array_key_exists($key,$array)';
//元素32的键值是0，查找的键值是“0”，没有严格的类型匹配
$arr=array("name"=>"DOOR",32);
if (array_key_exists("0",$arr)){
	echo "<br/>存在";
}

Code running result:

数组的操作2：array_key_exists($key,$array)
存在

Summary: in_array and array_key_exists matching are case-sensitive.

The above introduces the array 'search' operation, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.